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Tag: New Publications

Dairy cattle eats processed maize stover in India. (Photo: P.H. Zaidi/CIMMYT)

New publications: Scientists find genomic regions associated with better quality stover traits in maize for animal feed

Written by Alison Doody on . Posted in Publications.

Researchers from the International Maize and Wheat Improvement Center (CIMMYT) and the International Livestock Research Institute (ILRI) have identified new genomic regions associated with maize stover quality, an important by-product of maize which can be used in animal feed.

The results of the study, published this month in Nature Scientific Reports, will allow maize breeders to select for stover quality traits more quickly and cost-effectively, and to develop new dual purpose maize varieties without sacrificing grain yield.

The researchers screened diverse Asia-adapted CIMMYT maize lines from breeders’ working germplasm for animal feed quality traits. They then used these as a reference set to predict the breeding values of over a thousand doubled haploid lines derived from abiotic stress breeding programs based on genetic information. Based on these breeding values, the scientists further selected 100 of these double haploid lines and validated the performance of stover quality traits through field-based phenotyping.

The results demonstrate the feasibility of incorporating genomic prediction as a tool to improve stover traits, circumventing the need for field or lab-based phenotyping. The findings significantly reduce the need for additional testing resources — a major hindrance in breeding dual-purpose maize varieties.

Interestingly, the researchers found that increased animal feed quality in maize stover had no impact on grain yield, a concern raised by scientists in the past.

“The main purpose of this study and overall purpose of this CIMMYT and ILRI collaboration was to optimize the potential of maize crops for farm families, increase income, improve livelihoods and sustainably manage the crop livestock system, within limited resources,” said P.H. Zaidi, a maize physiologist at CIMMYT and co-author of the study.

“More than 70% of the farmers in the tropics are smallholders so they don’t have a lot of land to grow crops for grain purposes and separate stover for animal feed, so this is a very sustainable model if they grow dual purpose maize.”

By growing maize simultaneously for both human consumption and animal feed, farmers can get the most out of their crops and conserve natural resources like land and water.

A farmer works in a maize field close to the Pusa site of the Borlaug Institute for South Asia (BISA), in the Indian state of Bihar. (Photo: M. DeFreese/CIMMYT)
A farmer works in a maize field close to the Pusa site of the Borlaug Institute for South Asia (BISA), in the Indian state of Bihar. (Photo: M. DeFreese/CIMMYT)

Fodder for thought

The findings from this study also validate the use of genomic prediction as an important breeding tool to accelerate the development and improvement of dual-purpose maize varieties, according to CIMMYT Maize Breeder and first author of the study, M.T. Vinayan.

With the demand for animal feed increasing around the world, crop scientists and breeders have been exploring more efficient ways to improve animal feed quality in cereals without compromising grain yields for human consumption.

“Not all maize varieties have good stover quality, which is what we realized when we started working on this project. However, we discovered that there are a few which offer just as good quality as sorghum stover — a major source of livestock fodder particularly in countries such as India,” said Zaidi.

The publication of the study is a fitting tribute to the late Michael Blummel, who was a principal scientist and deputy program leader in the feed and forage development program at ILRI and co-author of this study.

“A couple of years back Dr Blummel relocated from the Hyderabad office at ILRI to its headquarters at Addis Ababa, but he used to frequently visit Hyderabad, and without fail met with us on each visit to discuss updates, especially about dual-purpose maize work. He was very passionate about dual-purpose maize research with a strong belief that the additional income from maize stover at no additional cost will significantly improve the income of maize farmers,” Zaidi said. “Michael was following this publication very closely because it was the first of its kind in terms of molecular breeding for dual purpose maize. He would have been very excited to see this published.”

Read the full article:
Genome wide association study and genomic prediction for stover quality traits in tropical maize (Zea mays L.)

Cover photo: Dairy cattle eats processed maize stover in India. (Photo: P.H. Zaidi/CIMMYT)

A rice farmer in central Bangladesh tends to his crop. (Photo: Scott Wallace/World Bank)

New publications: COVID-19 induced economic loss and ensuring food security for vulnerable groups

Written by Emma Orchardson on . Posted in Publications.

At present, nearly half of the world’s population is under some form of government restriction to curb the spread of COVID-19. In Bangladesh, in the wake of five deaths and 48 infections early in the year, the government imposed a nationwide lockdown between March 24 and May 30, 2020. Until April 17, 38 of the country’s 64 districts were under complete lockdown.

“While this lockdown restricted the spread of the disease, in the absence of effective support, it can generate severe food and nutrition insecurity for daily wage-based workers,” says Khondoker Mottaleb, an agricultural economist based at the International Maize and Wheat Improvement Center (CIMMYT).

Of the 61 million people who make up Bangladesh’s employed labor force, nearly 35% are paid daily. In a new study published in PLOS ONE, Mottaleb examines the food security and welfare impacts of the lockdowns on these daily-wage workers — in both farm and non-farm sectors — who are comparatively more resource-poor in terms of land ownership and education, and therefore likely to be hit hardest by a loss in earnings.

Using information from 50,000 economically active workers in Bangladesh, collected by the Bangladesh Bureau of Statistics (BBS), the study quantifies the economic losses from the COVID-19 lockdowns based on daily-wage workers’ lost earnings and estimates the minimum compensation packages needed to ensure their minimum food security during the lockdown period.

Using the estimated daily wage earnings, the authors estimate that a one-day, complete lockdown generates an economic loss equivalent to $64.2 million. After assessing the daily per capita food expenditure for farm and non-farm households, the study estimates the need for a minimum compensation package of around $1 per day per household to ensure minimum food security for the daily wage-based worker households.

In May 2020, the Government of Bangladesh announced the provision of approximately $24 per month to two million households, half of whom will receive additional food provision. While this amount is in line with Mottaleb’s findings, he stresses than this minimum support package is only suitable for the short-term, and that in the event of a prolonged lockdown period it will be necessary to consider additional support for other household costs such as clothing, medicine and education.

“Without effective support programs, the implementation of a strict lockdown for a long time may be very difficult, if poor households are forced to come out to search for work, money and food,” explains Mottaleb. “In the event of a very strict lockdown scenario, the government should consider issuing movement passes to persons and carriers of agricultural input and output to support smallholder agriculture, wage workers and agricultural value chains.”

Read the full article:
COVID-19 induced economic loss and ensuring food security for vulnerable groups: Policy implications for Bangladesh

Read more recent publications from CIMMYT researchers:

  1. Potential of climate-smart agriculture in reducing women farmers’ drudgery in high climatic risk areas. 2020. Khatri-Chhetri, A., Punya Prasad Regmi, Nitya Chanana, Aggarwal, P.K. In: Climatic Change v. 158, pg. 29-42.
  2. Crop–livestock integration in smallholder farming systems of Goromonzi and Murehwa, Zimbabwe. 2020. Mkuhlani, S., Mupangwa, W., MacLeod, N., Lovemore Gwiriri, Nyagumbo, I., Manyawu, G., Ngavaite Chigede. In: Renewable Agriculture and Food Systems v. 35, no. 3, pg. 249-260.
  3. Effects of maize residue and mineral nitrogen applications on maize yield in conservation-agriculture-based cropping systems of Southern Africa. 2020. Mupangwa, W., Thierfelder, C., Cheesman, S., Nyagumbo, I., Muoni, T., Mhlanga, B., Mwila, M., Sida T.S., Ngwira, A. In: Renewable Agriculture and Food Systems v. 35, no. 2, pg. 322-335.
  4. From interest to implementation: exploring farmer progression of conservation agriculture in Eastern and Southern Africa. 2020. Brown, B., Nuberg, I., Llewellyn, R. In: Environment, Development and Sustainability v. 22, pg. 3159-3177.
  5. Spatial variability of soil physicochemical properties in agricultural fields cultivated with sugarcane (Saccharum officinarum L.) in southeastern Mexico. 2020. Salgado-Velázquez, S., Salgado-García, S., Rincón-Ramírez, J.A., Rodrigues, F., Palma-López, D.J., Córdova-Sánchez, S., López-Castañeda, A. In: Sugar Tech v. 22, pg. 65-75.
  6. Apparent gains, hidden costs: examining adoption drivers, yield, and profitability outcomes of rotavator tillage in wheat systems in Nepal. 2020. Paudel, G.P., Krishna, V.V., McDonald, A. In: Journal of Agricultural Economics v. 71, no. 1, pg. 199-218.
  7. Multi‐site bundling of drought tolerant maize varieties and index insurance. 2020. Awondo, S.N., Kostandini, G., Setimela, P.S., Erenstein, O. In: Journal of Agricultural Economics v. 71, no.1, pg. 239-259.
  8. Leaving no one behind: how women seize control of wheat–maize technologies in Bangladesh. 2020. Farnworth, C.R., Jafry, T., Rahman, S., Badstue, L.B. In: Canadian Journal of Development Studies v. 41, no. 1, pg. 20-39.
  9. Learning adaptation to climate change from past climate extremes: evidence from recent climate extremes in Haryana, India. 2020. Aryal, J.P., Jat, M.L., Sapkota, T.B., Rahut, D.B., Rai, M., Jat, H.S., Sharma, P.C., Stirling, C. In: International Journal of Climate Change Strategies and Management v. 12. No. 1, pg. 128-146.
  10. Climate change mitigation options among farmers in South Asia. 2020. Aryal, J.P., Rahut, D.B., Sapkota, T.B., Khurana, R., Khatri-Chhetri, A. In: Environment, Development and Sustainability v. 22, pg. 3267-3289.
  11. Does climate-smart village approach influence gender equality in farming households? A case of two contrasting ecologies in India. 2020. Hariharan, V.K., Mittal, S., Rai, M., Agarwal, T., Kalvaniya, K.C., Stirling, C., Jat, M.L. In: Climatic Change v. 158, pg. 77-90.
  12. First Report of TTRTF race of wheat stem rust, Puccinia graminis f. sp. tritici, in Ethiopia. 2020. Tesfaye, T., Chala, A., Shikur, E., Hodson, D.P., Szabo, L.J. In: Plant Disease v. 104, no. 1, 293-293.
  13. Multi-level socioecological drivers of agrarian change: longitudinal evidence from mixed rice-livestock-aquaculture farming systems of Bangladesh. 2020. Aravindakshan, S., Krupnik, T.J., Groot, J.C.J., Speelman, E. N., Amjath Babu, T.S, Tittonell, P. In: Agricultural Systems v. 177, art. 102695.
  14. Carbon sequestration potential through conservation agriculture in Africa has been largely overestimated: comment on: “Meta-analysis on carbon sequestration through conservation agriculture in Africa”. 2020. Corbeels, M., Cardinael, R., Powlson, D.S., Chikowo, R., Gerard, B. In: Soil and Tillage Research v. 196, art. 104300.
  15. Operationalizing the concept of robustness of nitrogen networks in mixed smallholder systems: a pilot study in the mid-hills and lowlands of Nepal. 2020. Alomia-Hinojosa, V., Groot, J.C.J., Speelman, E. N., Bettinelli, C., McDonald, A., Alvarez, S., Tittonell, P. In: Ecological Indicators v. 110, art. 105883.
  16. The spread of smaller engines and markets in machinery services in rural areas of South Asia. 2020. Justice, S., Biggs, S. In: Journal of Rural Studies v. 73, pg. 10-20.
  17. Functional farm household typologies through archetypal responses to disturbances. 2020. Tittonell, P., Bruzzone, O., Solano-Hernández, A., Lopez-Ridaura, S., Easdale, M.H. In: Agricultural Systems v. 178, art. 102714.
  18. Data on a genome-wide association study of type 2 diabetes in a Maya population. 2020. Totomoch-Serra, A., Domínguez-Cruz, M.G., Muñoz, M. de L., García-Escalante, M.G., Burgueño, J., Diaz-Badillo, A., Valadez-González, N., Pinto-Escalantes, D. In: Data in Brief v. 28, art. 104866.
  19. On-farm performance and farmers’ participatory assessment of new stress-tolerant maize hybrids in Eastern Africa. 2020. Regasa, M.W., De Groote, H., Munyua, B., Makumbi, D., Owino, F., Crossa, J., Beyene, Y., Mugo, S.N., Jumbo, M.B., Asea, G., Mutinda, C.J.M., Kwemoi, D.B., Woyengo, V., Olsen, M., Prasanna, B.M. In: Field Crops Research v. 246, art. 107693.
  20. Different uncertainty distribution between high and low latitudes in modelling warming impacts on wheat. 2020. Wei Xiong, Asseng, S., Hoogenboom, G., Hernandez-Ochoa, I.M., Robertson, R., Sonder, K., Pequeno, D.N.L., Reynolds, M.P., Gerard, B. In. Nature Food v. 1, pg. 63-69.
  21. Gender relations along the maize value chain in Mozambique. 2020. Adam, R.I., Quinhentos, M., Muindi, P., Osanya, J. In: Outlook on Agriculture v. 49, no. 2, pg. 133–144.
  22. Genetic dissection of zinc, iron, copper, manganese and phosphorus in wheat (Triticum aestivum L.) grain and rachis at two developmental stages. 2020. Cu, S.T., Guild, G., Nicolson, A., Velu, G., Singh, R.P., Stangoulis, J. In: Plant Science v. 291, art. 110338.
  23. Indigenous knowledge of traditional foods and food literacy among youth: insights from rural Nepal. 2020. Gartaula, H., Patel, K., Shukla, S., Devkota, R. In: Journal of Rural Studies v. 73, pg. 77-86.
  24. Analysis of household access to drinking water, sanitation, and waste disposal services in urban areas of Nepal. 2020. Behera, B., Rahut, D.B., Sethi, N. In: Utilities Policy v. 62, art. 100996.
  25. Mapping of QTL for partial resistance to powdery mildew in two Chinese common wheat cultivars. 2020. Xiaoting Xu, Zhanwang Zhu, Aolin Jia, Fengju Wang, Jinping Wang, Yelun Zhang, Chao Fu, Luping Fu, Guihua Bai, Xianchun Xia, Yuanfeng Hao, He Zhonghu In: Euphytica v. 216, no. 1, art. 3.
  26. Enabling smallholder farmers to sustainably improve their food, energy and water nexus while achieving environmental and economic benefits. 2020. Gathala, M.K., Laing, A.M., Tiwari, T.P., Timsina, J., Islam, Md.S., Chowdhury, A.K., Chattopadhyay, C., Singh, A.K., Bhatt, B. P., Shrestha, R., Barma, N.C.D., Dharamvir Singh Rana, Jackson, T., Gerard, B. In: Renewable and Sustainable Energy Reviews v. 120, art. 109645.
  27. Harnessing wheat Fhb1 for Fusarium resistance. 2020. Yuanfeng Hao, Rasheed, A., Zhanwang Zhu, Wulff, B.B.H., He Zhonghu In: Trends in Plant Science v. 25, no. 1, pg. 1-3.
  28. Energy-efficient, sustainable crop production practices benefit smallholder farmers and the environment across three countries in the Eastern Gangetic Plains, South Asia. 2020. Gathala, M.K., Laing, A.M., Tiwari, T.P., Timsina, J., Saiful Islam, Bhattacharya, P.M., Dhar, T., Ghosh, A., Sinha, A.K., Chowdhury, A.K., Hossain, S., Hossain, M.I., Molla, M.S.H., Rashid, M., Kumar, S., Kumar, R., Dutta, S.K., Srivastwa, P.K., Chaudhary, B., Jha, S.K., Ghimire, P., Bastola, B., Chaubey, R.K., Kumar, U., Gerard, B. In: Journal of Cleaner Production v. 246, art. 118982.

Feature image: A rice farmer in central Bangladesh tends to his crop. (Photo: Scott Wallace/World Bank).

Women harvest wheat in India. (Photo: J. Cumes/CIMMYT)

New publications: From working in the fields to taking control

Written by Alison Doody on . Posted in Publications. 1 Comment on New publications: From working in the fields to taking control

Using data from 12 communities across four Indian states, an international team of researchers has shed new light on how women are gradually innovating and influencing decision-making in wheat-based systems.

The study, published this month in The European Journal of Development Research, challenges stereotypes of men being the sole decision-makers in wheat-based systems and performing all the work. The authors, which include researchers from the CGIAR Research Program on Wheat (WHEAT)-funded GENNOVATE initiative, show that women adopt specific strategies to further their interests in the context of wheat-based livelihoods.

In parts of India, agriculture has become increasingly feminized in response to rising migration of men from rural areas to cities. An increasing proportion of women, relative to men, are working in the fields. However, little is known about whether these women are actually taking key decisions.

The authors distinguish between high gender gap communities — identified as economically vibrant and highly male-dominant — and low gender gap communities, which are also economically vibrant but where women have a stronger say and more room to maneuver.

The study highlights six strategies women adopt to participate actively in decision-making. These range from less openly challenging strategies that the authors term acquiescence, murmuring, and quiet co-performance (typical of high gender gap communities), to more assertive ones like active consultation, women managing, and finally, women deciding (low gender gap communities).

In acquiescence, for example, women are fully conscious that men do not expect them to take part in agricultural decision-making, but do not articulate any overt forms of resistance.

In quiet co-performance, some middle-income women in high gender gap communities begin to quietly support men’s ability to innovate, for example by helping to finance the innovation, and through carefully nuanced ‘suggestions’ or ‘advice.’ They don’t openly question that men take decisions in wheat production. Rather, they appear to use male agency to support their personal and household level goals.

In the final strategy, women take all decisions in relation to farming and innovation. Their husbands recognize this process is happening and support it.

A wheat farmer in India. (Photo: J. Cumes/CIMMYT)
A wheat farmer in India. (Photo: J. Cumes/CIMMYT)

“One important factor in stronger women’s decision-making capacity is male outmigration. This is a reality in several of the low gender gap villages studied—and it is a reality in many other communities in India. Another is education—many women and their daughters talked about how empowering this is,” said gender researcher and lead-author Cathy Farnworth.

In some communities, the study shows, women and men are adapting by promoting women’s “managerial” decision-making. However, the study also shows that in most locations the extension services have failed to recognize the new reality of male absence and women decision-makers. This seriously hampers women, and is restricting agricultural progress.

Progressive village heads are critical to progress, too. In some communities, they are inclusive of women but in others, they marginalize women. Input suppliers — including machinery providers — also have a vested interest in supporting women farm managers. Unsurprisingly, without the support of extension services, village heads, and other important local actors, women’s ability to take effective decisions is reduced.

“The co-authors, partners at Glasgow Caledonian University and in India, were very important to both obtaining the fieldwork data, and the development of the typology” said Lone Badstue, researcher at the International Maize and Wheat Improvement Center (CIMMYT) and another co-author of the paper.

The new typology will allow researchers and development partners to better understand empowerment dynamics and women’s agency in agriculture. The authors argue that development partners should support these strategies but must ultimately leave them in the hands of women themselves to manage.

“It’s an exciting study because the typology can be used by anyone to distinguish between the ways women (and men) express their ideas and get to where they want”, concluded Farnworth.

Read the full article in The European Journal of Development Research:
From Working in the Fields to Taking Control. Towards a Typology of Women’s Decision-Making in Wheat in India

Women harvest wheat in India. (Photo: J. Cumes/CIMMYT)
Women harvest wheat in India. (Photo: J. Cumes/CIMMYT)

See more recent publications from CIMMYT researchers:

  1. isqg: A Binary Framework for in Silico Quantitative Genetics. 2019. Toledo, F.H., Perez-Rodriguez, P., Crossa, J., Burgueño, J. In: G3: Genes, Genomes, Genetics v. 9, no. 8, pag. 2425-2428
  2. Short-term impacts of conservation agriculture on soil physical properties and productivity in the midhills of Nepal. 2019. Laborde, J.P., Wortmann, C.S., Blanco-Canqui, H., McDonald, A., Baigorria, G.A., Lindquist, J.L. In: Agronomy Journal v.111, no. 4, pag. 2128-2139.
  3. Meloidogyne arenaria attacking eggplant in Souss region, Morocco. 2019. Mokrini, F., El Aimani, A., Abdellah Houari, Bouharroud, R., Ahmed Wifaya, Dababat, A.A. In: Australasian Plant Disease Notes v. 14, no. 1, art. 30.
  4. Differences in women’s and men’s conservation of cacao agroforests in coastal Ecuador. 2019. Blare, T., Useche, P. In: Environmental Conservation v. 46, no. 4, pag. 302-309.
  5. Assessment of the individual and combined effects of Rht8 and Ppd-D1a on plant height, time to heading and yield traits in common wheat. 2019. Kunpu Zhang, Junjun Wang, Huanju Qin, Zhiying Wei, Libo Hang, Pengwei Zhang, Reynolds, M.P., Daowen Wang In: The Crop Journal v. 7, no. 6, pag. 845-856.
  6. Quantifying carbon for agricultural soil management: from the current status toward a global soil information system. 2019. Paustian, K., Collier, S., Baldock, J., Burgess, R., Creque, J., DeLonge, M., Dungait, J., Ellert, B., Frank, S., Goddard, T., Govaerts, B., Grundy, M., Henning, M., Izaurralde, R.C., Madaras, M., McConkey, B., Porzig, E., Rice, C., Searle, R., Seavy, N., Skalsky, R., Mulhern, W., Jahn, M. In: Carbon Management v. 10, no. 6, pag. 567-587.
  7. Factors contributing to maize and bean yield gaps in Central America vary with site and agroecological conditions. 2019. Eash, L., Fonte, S.J., Sonder, K., Honsdorf, N., Schmidt, A., Govaerts, B., Verhulst, N. In: Journal of Agricultural Science v. 157, no. 4, pag. 300-317.
  8. Genome editing, gene drives, and synthetic biology: will they contribute to disease-resistance crops, and who will benefit?. 2019. Pixley, K.V., Falck-Zepeda, J.B., Giller, K.E., Glenna, L.L., Gould, F., Mallory-Smith, C., Stelly, D.M., Stewart Jr, C.N. In: Annual Review of Phytopathology v. 57, pag. 165-188.
  9. Rice mealybug (Brevennia rehi): a potential threat to rice in a long-term rice-based conservation agriculture system in the middle Indo-Gangetic Plain. 2019. Mishra, J. S., Poonia, S. P., Choudhary, J.S., Kumar, R., Monobrullah, M., Verma, M., Malik, R.K., Bhatt, B. P. In: Current Science v. 117, no. 4, 566-568.
  10. Trends in key soil parameters under conservation agriculture-based sustainable intensification farming practices in the Eastern Ganga Alluvial Plains. 2019. Sinha, A.K., Ghosh, A., Dhar, T., Bhattacharya, P.M., Mitra, B., Rakesh, S., Paneru, P., Shrestha, R., Manandhar, S., Beura, K., Dutta, S.K., Pradhan, A.K., Rao, K.K., Hossain, A., Siddquie, N., Molla, M.S.H., Chaki, A.K., Gathala, M.K., Saiful Islam., Dalal, R.C., Gaydon, D.S., Laing, A.M., Menzies, N.W. In: Soil Research v. 57, no. 8, Pag. 883-893.
  11. Genetic contribution of synthetic hexaploid wheat to CIMMYT’s spring bread wheat breeding germplasm. 2019. Rosyara, U., Kishii, M., Payne, T.S., Sansaloni, C.P., Singh, R.P., Braun, HJ., Dreisigacker, S. In: Nature Scientific Reports v. 9, no. 1, art. 12355.
  12. Joint use of genome, pedigree, and their interaction with environment for predicting the performance of wheat lines in new environments. 2019. Howard, R., Gianola, D., Montesinos-Lopez, O.A., Juliana, P., Singh, R.P., Poland, J.A., Shrestha, S., Perez-Rodriguez, P., Crossa, J., Jarquín, D. In: G3: Genes, Genomes, Genetics v. 9, no. 9 pag. 2925-2934.
  13. Deep kernel for genomic and near infrared predictions in multi-environment breeding trials. 2019. Cuevas, J., Montesinos-Lopez, O.A., Juliana, P., Guzman, C., Perez-Rodriguez, P., González-Bucio, J., Burgueño, J., Montesinos-Lopez, A., Crossa, J. In: G3: Genes, Genomes, Genetics v. 9. No. 9, pag. 2913-2924.
  14. Multi-environment QTL analysis using an updated genetic map of a widely distributed Seri × Babax spring wheat population. 2019. Caiyun Liu, Khodaee, M., Lopes, M.S., Sansaloni, C.P., Dreisigacker, S., Sukumaran, S., Reynolds, M.P. In: Molecular Breeding v. 39, no. 9, art. 134.
  15. Characterization of Ethiopian wheat germplasm for resistance to four Puccinia graminis f. sp. tritici races facilitated by single-race nurseries. 2019. Hundie, B., Girma, B., Tadesse, Z., Edae, E., Olivera, P., Hailu, E., Worku Denbel Bulbula, Abeyo Bekele Geleta, Badebo, A., Cisar, G., Brown-Guedira, G., Gale, S., Yue Jin, Rouse, M.N. In: Plant Disease v. 103, no. 9, pag. 2359-2366.
  16. Marker assisted transfer of stripe rust and stem rust resistance genes into four wheat cultivars. 2019. Randhawa, M.S., Bains, N., Sohu, V.S., Chhuneja Parveen, Trethowan, R.M., Bariana, H.S., Bansal, U. In: Agronomy v. 9, no. 9, art. 497.
  17. Design and experiment of anti-vibrating and anti-wrapping rotary components for subsoiler cum rotary tiller. 2019. Kan Zheng, McHugh, A., Hongwen Li, Qingjie Wang, Caiyun Lu, Hongnan Hu, Wenzheng Liu, Zhiqiang Zhang, Peng Liu, Jin He In: International Journal of Agricultural and Biological Engineering v. 14, no. 4, pag. 47-55.
  18. Hydrogen peroxide prompted lignification affects pathogenicity of hemi-bio-trophic pathogen Bipolaris sorokiniana to wheat. 2019. Poudel, A., Sudhir Navathe, Chand, R., Vinod Kumar Mishra, Singh, P.K., Joshi, A.K. In: Plant Pathology Journal v. 35, no. 4, pag. 287-300.
  19. Population-dependent reproducible deviation from natural bread wheat genome in synthetic hexaploid wheat. 2019. Jighly, A., Joukhadar, R., Sehgal, D., Sukhwinder-Singh, Ogbonnaya, F.C., Daetwyler, H.D. In: Plant Journal v. 100, no, 4. Pag. 801-812.
  20. How do informal farmland rental markets affect smallholders’ well-being? Evidence from a matched tenant–landlord survey in Malawi. 2019. Ricker-Gilbert, J., Chamberlin, J., Kanyamuka, J., Jumbe, C.B.L., Lunduka, R., Kaiyatsa, S. In: Agricultural Economics v. 50, no. 5, pag. 595-613.
  21. Distribution and diversity of cyst nematode (Nematoda: Heteroderidae) populations in the Republic of Azerbaijan, and their molecular characterization using ITS-rDNA analysis. 2019. Dababat, A.A., Muminjanov, H., Erginbas-Orakci, G., Ahmadova Fakhraddin, G., Waeyenberge, L., Senol Yildiz, Duman, N., Imren, M. In: Nematropica v. 49, no. 1, pag. 18-30.
  22. Response of IITA maize inbred lines bred for Striga hermonthica resistance to Striga asiatica and associated resistance mechanisms in southern Africa. 2019. Gasura, E., Setimela, P.S., Mabasa, S., Rwafa, R., Kageler, S., Nyakurwa, C. S. In: Euphytica v. 215, no. 10, art. 151.
  23. QTL mapping and transcriptome analysis to identify differentially expressed genes induced by Septoria tritici blotch disease of wheat. 2019. Odilbekov, F., Xinyao He, Armoniené, R., Saripella, G.V., Henriksson, T., Singh, P.K., Chawade, A. In: Agronomy v. 9, no. 9, art. 510.
  24. Molecular diversity and selective sweeps in maize inbred lines adapted to African highlands. 2019. Dagne Wegary Gissa, Chere, A.T., Prasanna, B.M., Berhanu Tadesse Ertiro, Alachiotis, N., Negera, D., Awas, G., Abakemal, D., Ogugo, V., Gowda, M., Fentaye Kassa Semagn In: Nature Scientific Reports v. 9, art. 13490.
  25. The impact of salinity on paddy production and possible varietal portfolio transition: a Vietnamese case study. 2019. Dam, T.H.T., Amjath Babu, T.S., Bellingrath-Kimura, S., Zander, P. In: Paddy and Water Environment In: 17. No. 4, pag. 771-782.

New publications: Optimum nitrogen fertilizer rates for rice and wheat in the Indo-Gangetic Plains of India

Written by Alison Doody on . Posted in Publications. 1 Comment on New publications: Optimum nitrogen fertilizer rates for rice and wheat in the Indo-Gangetic Plains of India

 

Wheat spikes against the sky. (Photo: H. Hernandez Lira/CIMMYT)

New research by an international team of scientists, including International Maize and Wheat Improvement Center (CIMMYT) agricultural systems and climate change scientist Tek Sapkota, has identified the optimum rates of nitrogen fertilizer application for rice and wheat crops in the Indo-Gangetic Plains of India.

By measuring crop yield and nitrous oxide (N2O) fluxes over two years, Sapkota and his colleagues reported that the optimum rate of N fertilizer for rice is between 120 and 200 kg per hectare, and between 50 and 185 kg per hectare for wheat. The results of the study have the potential to save farmer’s money and minimize dangerous greenhouse gas emissions while maintaining crop productivity.

Nitrous oxide, one of the most important greenhouse gases in the earth’s atmosphere, is responsible for ozone depletion and global climate change, and has a global warming potential 265 times that of carbon dioxide (CO2).

Research has shown that agricultural soils account for around 60% of global nitrous oxide emissions. These emissions are directly related to the application of nitrogen fertilizers to croplands. While these fertilizers help crop yields, studies show that only about one third of the applied nitrogen is actually used by crops. The rest is released as nitrous oxide or seeps into waterways, causing harmful algal blooms.

In India, the total consumption of nitrogen fertilizer is about 17 million tons — expected to rise to 24 million tons by 2030 to feed a growing population. Nitrous oxide emissions will rise along with it if farmers do not minimize their fertilizer use and manage application more efficiently. What’s more, farmers receive a higher subsidy for nitrogen fertilizer — a policy that leads farmers to apply more fertilizer than the recommended dose.

Measured methods

The study, led by Sapkota, estimated the rate of nitrogen fertilizer application with the most economically optimum yield and minimum environmental footprint. Applying more fertilizer than this would be a waste of farmer’s money and cause unnecessary harm to the environment.

Researchers measured crop yield and nitrous oxide fluxes for two wheat seasons and one rice season from 2014 to 2016.  The scientists found that nitrogen fertilization rate clearly influenced daily and cumulative soil nitrous oxide emissions in wheat and rice for both years. Nitrous oxide emissions were higher in both wheat and rice in the nitrogen-fertilized plots than in the control plots.

Using statistical methods, the researchers were able to measure the relationship between crop productivity, nitrogen rate and emissions intensity, in both rice and wheat. This gave them the optimum rate of nitrogen fertilizer application.

This work was carried out by International Maize and Wheat Improvement Center (CIMMYT) and implemented as part of the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS), with support from the CGIAR Trust Fund and through bilateral funding agreements.

Read the full study:
Identifying optimum rates of fertilizer nitrogen application to maximize economic return and minimize nitrous oxide emission from rice–wheat systems in the Indo-Gangetic Plains of India

See more recent publications by CIMMYT researchers: 

  1. Landscape composition overrides field level management effects on maize stemborer control in Ethiopia. 2019. Kebede, Y., Bianchi, F., Baudron, F., Tittonell, P. In: Agriculture, Ecosystems and Environment v. 279, p. 65-73.
  2. From plot to scale: ex-ante assessment of conservation agriculture in Zambia. 2019. Komarek, A.M.| Hoyoung Kwon, Haile, B., Thierfelder, C., Mutenje, M., Azzarri, C. In: Agricultural Systems v. 173, p. 504-518.
  3. Importance of considering technology growth in impact assessments of climate change on agriculture. 2019. Aggarwal, P.K., Vyas, S., Thornton, P., Campbell, B.M., Kropff, M. In. Global Food Security v. 23, p. 41-48.
  4. Evaluating maize genotype performance under low nitrogen conditions using RGB UAV phenotyping techniques. 2019. Buchaillot, M.L., Gracia-Romero, A., Vergara, O., Zaman-Allah, M., Amsal Tesfaye Tarekegne, Cairns, J.E., Prasanna, B.M., Araus, J.L., Kefauver, S.C. In: Sensors v. 19. No. 8, art. 1815.
  5. Understanding tropical maize (Zea mays L.): the major monocot in modernization and sustainability of agriculture in sub-Saharan Africa. 2019. Awata, L.A.O., Tongoona, P., Danquah, E., Ifie, B.E., Mahabaleswara, S.L., Jumbo, M.B., Marchelo-D’ragga, P.W., Sitonik, C. In: International Journal of Advance Agricultural Research v. 7, no. 2, p. 32-77.
  6. Genome-wide genetic diversity and population structure of tunisian durum wheat landraces based on DArTseq technology. 2019. Robbana, C., Kehel, Z., Ben Naceur, M., Sansaloni, C.P., Bassi, F., Amri, A. In: International Journal of Molecular Sciences v. 20, no. 6, art. 1352.
  7. High-throughput phenotyping for crop improvement in the genomics era. 2019. Mir, R., Reynolds, M.P., Pinto Espinosa, F., Khan, M.A., Bhat, M. In: Plant Science     v. 282, p. 60-72.
  8. Conservation agriculture based sustainable intensification: increasing yields and water productivity for smallholders of the Eastern Gangetic Plains. 2019. Islam, S., Gathala, M.K., Tiwari, T.P., Timsina, J., Laing, A.M., Maharjan, S., Chowdhury, A.K., Bhattacharya, P.M., Dhar, T., Mitra, B.,Kumar, S., Srivastwa, P.K., Dutta, S.K., Shrestha, R, Manandhar, S, Sherestha, S.R, Paneru, P, Siddquie, N, Hossain, A, Islam, R,Ghosh, A.K., Rahman, M.A., Kumar, U., Rao, K. K., Gerard, B. In: Field Crops Research v. 238, p. 1-17.
  9. Application of remote sensing for phenotyping tar spot complex resistance in maize. 2019. Loladze, A., Rodrigues, F., Toledo, F.H., San Vicente, F.M., Gerard, B., Prasanna, B.M. In: Frontiers in Plant Science v. 10, art. 552.
  10. 10. Investigation and genome-wide association study for Fusarium crown rot resistance in Chinese common wheat. 2019. Xia Yang, X., Yubo Pan, Singh, P.K., Xinyao He, Yan Ren, Lei Zhao, Ning Zhang, Cheng Shun-He, Feng Chen In: BMC Plant Biology v. 19, art. 153.
  11. Is labour a major determinant of yield gaps in sub-Saharan Africa?: a study of cereal-based production systems in Southern Ethiopia. 2019. Silva, J.V., Baudron, F., Reidsma, P., Giller, K.E. In: Agricultural Systems v. 174, p. 39-51.
  12. Stakeholders prioritization of climate-smart agriculture interventions: evaluation of a framework. 2019. Khatri-Chhetri, A., Pant, A., Aggarwal, P.K., Vasireddy, V.V., Yadav, A. In: Agricultural Systems v. 174, p. 23-31.
  13. Effect of crop management practices on crop growth, productivity and profitability of rice-wheat system in western Indo-gangetic plains. 2019. Sharma, P.C., Datta, A., Yadav, A.K., Choudhary, M., Jat, H.S., McDonald, A. In: Proceedings of the National Academy of Sciences India Section B – Biological Sciences v. 89, no. 2, p. 715-727.
  14. Economic benefits of blast-resistant biofortified wheat in Bangladesh: the case of BARI Gom 33. 2019. Mottaleb, K.A., Velu, G., Singh, P.K., Sonder, K., Xinyao He, Singh, R.P., Joshi, A.K., Barma, N.C.D., Kruseman, G., Erenstein, O. In: Crop Protection v. 123, p. 45-58.
  15. Genetic architecture of maize chlorotic mottle virus and maize lethal necrosis through GWAS, linkage analysis and genomic prediction in tropical maize germplasm. 2019. Sitonik, C., Mahabaleswara, S.L., Beyene, Y., Olsen, M., Makumbi, D., Kiplagat, O., Das, B., Jumbo, M.B., Mugo, S.N., Crossa, J., Amsal Tesfaye Tarekegne, Prasanna, B.M., Gowda, M. In: Theoretical and Applied Genetics v. 132, no. 8, p. 2381-2399.
  16. Sub-Saharan african maize-based foods: processing practices, challenges and opportunities. 2019. Ekpa, O., Palacios-Rojas, N., Kruseman, G., Fogliano, V., Linnemann, A. In: Food Reviews International v. 35, no. 7, p. 609-639.
  17. Provitamin A carotenoids in grain reduce aflatoxin contamination of maize while combating vitamin A deficiency. 2019. Suwarno, W.B., Hannok, P., Palacios-Rojas, N., Windham, G., Crossa, J., Pixley, K.V. In: Frontiers in Plant Science v. 10, art. 30.
  18. The 4th International Plant Phenotyping Symposium. 2019. Reynolds, M.P., Schurr, U. In: Plant Science v. 282, P. 1.
  19. Soil hydraulic response to conservation agriculture under irrigated intensive cereal-based cropping systems in a semiarid climate. 2019. Patra, S., Julich, S., Feger, K., Jat, M.L., Jat, H.S., Sharma, P.C., Schwärzel, K. In: Soil and Tillage Research v. 192, p. 151-163.
  20. Effects of crop residue retention on soil carbon pools after 6 years of rice-wheat cropping system. 2019. Sharma, S., Thind, H.S., Singh, Y., Sidhu, H.S., Jat, M.L., Parihar, C.M. In: Environmental Earth Sciences v. 78, no. 10, art. 296.
  21. 21. How to increase the productivity and profitability of smallholder rainfed wheat in the Eastern African highlands?: Northern Rwanda as a case study. 2019. Baudron, F., Ndoli, A., Habarurema, I., Silva, J.V. In: Field Crops Research v. 236, P. 121-131.
  22. Agro-ecological options for fall armyworm (Spodoptera frugiperda JE Smith) management: providing low-cost, smallholder friendly solutions to an invasive pest. 2019. Harrison, R., Thierfelder, C., Baudron, F., Chinwada, P., Midega, C., Schaffner, U., van den Berg, J. In: Journal of Environmental Management v. 236, p. 121-131.
  23. Preliminary characterization for grain quality traits and high and low molecular weight glutenins subunits composition of durum wheat landraces from Iran and Mexico. 2019. Hernandez Espinosa, N., Payne, T.S., Huerta-Espino, J., Cervantes, F., González-Santoyo, H., Ammar, K., Guzman, C. In: Journal of Cereal Science v. 88, p. 47-56.
  24. Tissue and nitrogen-linked expression profiles of ammonium and nitrate transporters in maize. 2019. Dechorgnat, J., Francis, K.L., Dhugga, K., Rafalski, A., Tyerman, S.D., Kaiser, B.N. In: BMC Plant Biology v. 19, art. 206.
  25. CGIAR Operations under the Plant Treaty Framework. 2019. Lopez-Noriega, I., Halewood, M., Abberton, M., Amri, A., Angarawai, I.I., Anglin, N., Blummel, M., Bouman, B., Campos, H., Costich, D.E., Ellis, D., Pooran M. Gaur., Guarino, L., Hanson, J., Kommerell, V., Kumar, P.L., Lusty, C., Ndjiondjop, M.N., Payne, T.S., Peters, M., Popova, E.,Prakash, G., Sackville-Hamilton, R., Tabo, R., Upadhyaya, H., Yazbek, M., Wenzl, P.  In: Crop Science v. 59, no. 3, p. 819-832.
CIMMYT's multi-crop, multi-use zero-tillage seeder at work on a long-term conservation agriculture trial plot at the center's global headquarters in Mexico. Maize crop residues are visible in the foreground. (Photo: CIMMYT)

New publications: Durum wheat selection under zero tillage increases early vigor and is neutral to yield

Written by Alison Doody on . Posted in Publications.

CIMMYT's multi-crop, multi-use zero-tillage seeder at work on a long-term conservation agriculture trial plot at the center's global headquarters in Mexico. Maize crop residues are visible in the foreground. (Photo: CIMMYT)
CIMMYT’s multi-crop, multi-use zero-tillage seeder at work on a long-term conservation agriculture trial plot at the center’s global headquarters in Mexico. Maize crop residues are visible in the foreground. (Photo: CIMMYT)

New research published in Field Crops Research by scientists at the International Maize and Wheat Improvement Center (CIMMYT) responds to the question of whether wheat varieties need to be adapted to zero tillage conditions.

With 33% of global soils already degraded, agricultural techniques like zero tillage — growing crops without disturbing the soil with activities like plowing — in combination with crop residue retention, are being considered to help protect soils and prevent further degradation. Research has shown that zero tillage with crop residue retention can reduce soil erosion and improve soil structure and water retention, leading to increased water use efficiency of the system. Zero tillage has also been shown to be the most environmentally friendly among different tillage techniques.

While CIMMYT promotes conservation agriculture, of which zero tillage is a component, many farmers who use CIMMYT wheat varieties still use some form of tillage. As farmers adopt conservation agriculture principles in their production systems, we need to be sure that the improved varieties breeders develop and release to farmers can perform equally well in zero tillage as in conventional tillage environments.

The aim of the study was to find out whether breeding wheat lines in a conservation agriculture environment had an effect on their adaptability to one tillage system or another, and whether separate breading streams would be required for each tillage system.

The scientists conducted parallel early generation selection in sixteen populations from the breeding program. The best plants were selected in parallel under conventional and zero-till conditions, until 234 and 250 fixed lines were obtained. They then grew all 484 wheat lines over the course of three seasons near Ciudad Obregon, Sonora, Mexico, under three different environments — zero tillage, conventional tillage, and conventional tillage with reduced irrigation — and tested them for yield and growth traits.

The authors found that yields were better under zero tillage than conventional tillage for all wheat lines, regardless of how they had been bred and selected, as this condition provided longer water availability between irrigations and mitigated inter-irrigation water stress.

The main result was that selection environment, zero-till versus conventional till, did not produce lines with specific adaptation to either conditions, nor did it negatively impact the results of the breeding program for traits such as plant height, tolerance to lodging and earliness.

One trait which was slightly affected by selection under zero-till was early vigor — the speed at which crops grow during the earliest stage of growth. Early vigor is a useful adaptive trait in conservation agriculture because it allows the crop to cope with high crop residue loads — materials left on the ground such as leaves, stems and seed pods — and can improve yield through rapid development of maximum leaf area in dry environments. Results showed that varieties selected under zero tillage showed slightly increased early vigor which means that selection under zero tillage may drive a breeding program towards the generalization of this useful attribute.

The findings demonstrate that CIMMYT’s durum wheat lines, traditionally bred for wide adaptation, can be grown, bred, and selected under either tillage conditions without negatively affecting yield performance. This is yet another clear demonstration that breeding for wide adaptation, a decades-long tradition within CIMMYT’s wheat improvement effort, is a suitable strategy to produce varieties that are competitive in a wide range of production systems. The findings represent a major result for wheat breeders at CIMMYT and beyond, with the authors concluding that it is not necessary to have separate breeding programs to address the varietal needs of either tillage systems.

This work was implemented by CIMMYT as part of the CGIAR Research Program on Wheat (WHEAT).

Read the full study:
Durum wheat selection under zero tillage increases early vigor and is neutral to yield.

Wheat rust expert Bob McIntosh, of the Plant Breeding Institute, University of Sydney, Australia, examining rust symptoms on a wheat line in Kenya. (Photo: Petr Kosina/CIMMYT)

New publications: Special collection on wheat genetics and breeding

Written by Emma Orchardson on . Posted in Publications. 2 Comments on New publications: Special collection on wheat genetics and breeding

Global wheat production is currently facing great challenges, from increasing climate variation to occurrence of various pests and diseases. These factors continue to limit wheat production in a number of countries, including China, where in 2018 unseasonably cold temperatures resulted in yield reduction of more than 10% in major wheat growing regions. Around the same time, Fusarium head blight spread from the Yangtze region to the Yellow and Huai Valleys, and northern China experienced a shortage of irrigated water.

In light of these ongoing challenges, international collaboration, as well as the development of new technologies and their integration with existing ones, has a key role to play in supporting sustainable wheat improvement, especially in developing countries. The International Maize and Wheat Improvement Center (CIMMYT) has been collaborating with China on wheat improvement for over 40 years, driving significant progress in a number of areas.

Notably, a standardized protocol for testing Chinese noodle quality has been established, as has a methodology for breeding adult-plant resistance to yellow rust, leaf rust and powdery mildew. More than 330 cultivars derived from CIMMYT germplasm have been released in the country and are currently grown over 9% of the Chinese wheat production area, while physiological approaches have been used to characterize yield potential and develop high-efficiency phenotyping platforms. The development of climate-resilient cultivars using new technology will be a priority area for future collaboration.

In a special issue of Frontiers of Agricultural Science and Engineering focused on wheat genetics and breeding, CIMMYT researchers present highlights from global progress in wheat genomics, breeding for disease resistance, as well as quality improvement, in a collection of nine review articles and one research article. They emphasize the significance of using new technology for genotyping and phenotyping when developing new cultivars, as well as the importance of global collaboration in responding to ongoing challenges.

In a paper on wheat stem rust, CIMMYT scientists Sridhar Bhavani, David Hodson, Julio Huerta-Espino, Mandeep Randawa and Ravi Singh discuss progress in breeding for resistance to Ug99 and other races of stem rust fungus, complex virulence combinations of which continue to pose a significant threat to global wheat production. The authors detail how effective gene stewardship and new generation breeding materials, complemented by active surveillance and monitoring, have helped to limit major epidemics and increase grain yield potential in key target environments.

In the same issue, an article by Caiyun Lui et al. discusses the application of spectral reflectance indices (SRIs) as proxies to screen for yield potential and heat stress, which is emerging in crop breeding programs. The results of a recent study, which evaluated 287 elite lines, highlight the utility of SRIs as proxies for grain yield. High heritability estimates and the identification of marker-trait associations indicate that SRIs are useful tools for understanding the genetic basis of agronomic and physiological traits.

Other papers by CIMMYT researchers discuss the history, activities and impact of the International Winter Wheat Improvement Program, as well as the ongoing work on the genetic improvement of wheat grain quality at CIMMYT.

Find the full collection of articles in Frontiers of Agricultural Science and Engineering, Volume 6, Issue 3, September 2019.

See more recent publications by CIMMYT researchers:

  1. Genetic diversity among tropical provitamin A maize inbred lines and implications for a biofortification program. 2019. Julius Pyton Sserumaga, Makumbi, D., Warburton, M.L., Opiyo, S.O., Asea, G., Muwonge, A., Kasozi, C.L. In: Cereal Research Communications v. 47, no. 1, p. 134-144.
  2. Diversity and conservation priorities of crop wild relatives in Mexico. 2019. Contreras-Toledo, A. R., Cortes-Cruz, M. A., Costich, D.E., Rico-Arce, M. de L., Magos Brehm, J., Maxted, N. In: Plant Genetic Resources: Characterisation and Utilisation v. 17, no. 2, p. 140-150.
  3. Global wheat production with 1.5 and 2.0°C above pre-industrial warming. 2019. Bing Liu, Martre, P., Ewert, F., Porter, J.R., Challinor, A.J., Muller, C., Ruane, A.C., Waha, K., Thorburn, P.J., Aggarwal, P.K., Mukhtar Ahmed, Balkovic, J., Basso, B., Biernath, C., Bindi, M., Cammarano, D., De Sanctis, G., Dumont, B., Espadafor, M., Eyshi Rezaei, E., Ferrise, R., Garcia-Vila, M., Gayler, S., Yujing Gao, Horan, H., Hoogenboom, G., Izaurralde, R.C., Jones, C.D., Kassie, B.T., Kersebaum, K.C., Klein, C., Koehler, A.K., Maiorano, A., Minoli, S., Montesino San Martin, M., Soora Naresh Kumar, Nendel, C., O’Leary, G.J., Palosuo, T., Priesack, E., Ripoche, D.,Rotter, R., Semenov, M.A., Stockle, C., Streck, T., Supit, I., Fulu Tao, Van der Velde, M., Wallach, D., Wang, E. |Webber, H., Wolf, J., Liujun Xiao, Zhao Zhang, Zhigan Zhao, Yan Zhu, Asseng, S. In: Global Change Biology v. 25, no. 4, p. 1428-1444.
  4. Marker Assisted Breeding to Develop Multiple Stress Tolerant Varieties for Flood and Drought Prone Areas. 2019. Sandhu, N., Dixit, S., Mallikarjuna Swamy, B.P., Raman, A.K., Kumar, S., Singh, S.P., Yadaw, R.B., Singh, O.N., Reddy, J.N., Anandan, A., Yadav, S., Venkataeshwarllu, C., Henry, A., Verulkar, S., Mandal, N.P., Ram, T., Badri, J., Vikram, P., Arvind Kumar In: Rice v. 12, no. 1, art. 8.
  5. Modeling Genotype × Environment Interaction Using a Factor Analytic Model of On-Farm Wheat Trials in the Yaqui Valley of Mexico. 2019. Vargas-Hernández, M., Ortiz-Monasterio, I., Perez-Rodriguez, P., Montesinos-Lopez, O.A., Montesinos-Lopez, A., Burgueño, J., Crossa, J. In: Agronomy Journal v. 111, no. 1, p. 1-11.
  6. Does Size Matter? A Critical Review of Meta-analysis in Agronomy. 2019. Krupnik, T.J., Andersson, J.A., Rusinamhodzi, L., Corbeels, M., Shennan, C., Gerard, B. In: Experimental Agriculture v. 55 no. Special issue 2, p. 200-229.
  7. Effects of tillage, crop establishment and diversification on soil organic carbon, aggregation, aggregate associated carbon and productivity in cereal systems of semi-arid Northwest India. 2019. Jat, H.S., Datta, A., Choudhary, M., Yadav, A.K., Choudhary, V., Sharma, P.C., Gathala, M.K., Jat, M.L., McDonald, A. In: Soil and Tillage Research v. 190, p. 128-138.
  8. Transgenic solutions to increase yield and stability in wheat: shining hope or flash in the pan? 2019. Araus, J.L., Serret, M.D., Lopes, M.S. In: Journal of Experimental Botany v. 70, no. 5, p. 1419-1424.
  9. Model-Driven Multidisciplinary Global Research to Meet Future Needs: The Case for “Improving Radiation Use Efficiency to Increase Yield.” 2019. Asseng, S., Martre, P., Ewert, F., Dreccer, M.F., Beres, B.L., Reynolds, M.P., Braun, H.J., Langridge, P., Gouis, J. Le., Salse, J., Baenziger, P.S. In: Crop Science v. 59, p. 1-7.
  10. Proteome analysis of biofilm produced by a Fusarium falciforme keratitis infectious agent. 2019. Calvillo-Medina, R.P., Reyes‐Grajeda, J.P., Barba‐Escoto, L., Bautista-Hernandez, L.A., Campos‐Guillen, J., Jones, G.H., Bautista‐de Lucio, V.M. In: Microbial Pathogenesis v. 130, p. 232-241.
A customer chooses bread in a small shop in Dinajpur, Bangladesh. (Photo: S. Mojumder/Drik/CIMMYT)

New publications: Do market shocks generate gender-differentiated impacts?

Written by Emma Orchardson on . Posted in Publications.

Female-headed households are likely to experience higher welfare losses due to commodity price hikes than their male-headed counterparts, as they tend to spend a larger percentage of their income on food items. However, the full extent of this impact of market has not been widely examined in the empirical literature.

Applying the difference-in-difference estimation procedure to data collected from more than 22,000 households in Bangladesh in 2005 and 2010, researchers at the International Maize and Wheat Improvement Center (CIMMYT) set out to examine the gender-differentiated impacts of the commodity price hikes during the food price crisis of 2008 on food and non-food consumption behavior based on the sex of the household head.

They found that, in general, the commodity price hikes had more adversely affected female-headed households, which reduced their expenditure on food and non-food items such as cereals and education at a greater rate than their male-headed counterparts did.

However, their study also reveals that the welfare impacts on these households varied greatly depending on socio-economic conditions. Results showed that households headed by women who were relatively better educated, who owned larger pieces of land and received remittances were buffered to a certain extent and their expenditure was affected less.

Understanding these buffering factors, the authors argue, is crucial when designing policy interventions in developing countries. The study provides a number of recommendations for government and international donor agencies to help female-headed households better cope with market shocks. For example, they could improve the reach of general education, increase women’s access to land and agricultural assets and remove barriers to the in-flow of remittances for female-headed households. Extending the reach of social protection and microcredit programs could further complement market shock buffering capacity, as could providing targeted capital.

Read more results and recommendations in the study, “Do market shocks generate gender-differentiated impacts? Policy implications from a quasi-natural experiment in Bangladesh” in Women’s Studies International Forum, Volume 76, September–October 2019.

This study was made possible through the support provided by the United States Agency for International Development (USAID) to the Cereal Systems Initiative for South Asia – Mechanization and Irrigation (CSISA-MI) project, and the Bill & Melinda Gates Foundation to the CSISA Phase II project.

See more recent publications by CIMMYT researchers:

  1. Elucidating the genetic basis of biomass accumulation and radiation use efficiency in spring wheat and its role in yield potential. 2019. Molero, G., Joynson, R. , Piñera Chavez, F.J. , Gardiner, L.J. , Rivera Amado, A.C. , Hall, A.J.W. , Reynolds, M.P. In: Plant Biotechnology Journal v. 17, no. 7, p. 1276-1288.
  2. Identification of recombinants carrying stripe rust resistance gene Yr57 and adult plant stem rust resistance gene Sr2 through marker‐assisted selection. 2019. Lodhi, S., Bariana, H.S., Randhawa, M.S., Gul Kazi, A., Peter John., Bansal, U. In: Plant Breeding v. 138, no. 2, p. 148-152.
  3. Effect of different tillage and residue management practices on crop and water productivity and economics in maize (Zea mays) based rotations. 2019. Parihar M.D., Parihar, C.M., Nanwal, R.K., Singh, A.K., Jat, S.L., Hari S. Nayak, Prakash Chand Ghasal, Jewlia, H.R., Choudhary, M. , Jat, M.L. In: Indian Journal of Agricultural Sciences v. 89, no. 2.
  4. A multi-scale and multi-model gridded framework for forecasting crop production, risk analysis, and climate change impact studies. 2019. Shelia, V., Hansen, J., Sharda, V., Porter, C., Aggarwal, P.K., Wilkerson, C.J., Hoogenboom, G. In: Environmental Modelling and Software v. 115, no. 144-154.
  5. Averting wheat blast by implementing a ‘wheat holiday’: in search of alternative crops in West Bengal, India. 2019. Mottaleb, K.A., Singh, P.K., Sonder, K., Kruseman, G., Erenstein, O. In: PLoS One v. 114, no. 2, art. E0211410.
  6. Estimating soil evaporation in dry seeded rice and wheat crops after wetting events. 2019. Gupta, N., Eberbach, P.L., Humphreys, E., Singh, B., Sudhir-Yadav, Kukal, S.S. In: Agricultural Water Management v. 217, p. 98-106.
  7. Dependence of temperature sensitivity of soil organic carbon decomposition on nutrient management options under conservation agriculture in a sub-tropical Inceptisol. 2019. Parihar, C.M., Singh, A.K., Jat, S.L., Ghosh, A., Dey, A., Hari S. Nayak, Parihar M.D., Mahala, D.M., Yadav, R.K., Rai, V., Satayanaryana, T., Jat, M.L. In: Soil and Tillage Research v. 190, p. 50-60.
  8. Biogas adoption and elucidating its impacts in India: implications for policy. 2019. Mottaleb, K.A., Rahut, D.B. In: Biomass and Bioenergy v. 123, p. 166-174.
  9. Reaction of Australian durum, common wheat and triticale genotypes to Karnal bunt (Tilletia indica) infection under artificial inoculation in the field. 2019. Emebiri, L. C., Singh, P.K. , Tan, M. K. , Fuentes Dávila, G., Xinyao He, Singh, R.P. In: Crop and Pasture Science v. 70, no. 2, p. 107-112.
  10. A farm-level assessment of labor and mechanization in Eastern and Southern Africa. 2019. Baudron, F., Misiko, M.T., Getnet, B., Nazare, R., Sariah, J., Kaumbutho, P. In: Agronomy for Sustainable Development v. 39, no. 2, art. 17.
Local irrigation service providers in southern Bangladesh demonstrate the use of a two-wheeled tractor to power an axial flow pump to provide fuel-efficient surface water irrigation. (Photo: Tim Krupnik/CIMMYT)

New publications: A study of water markets in Bangladesh

Written by Emma Orchardson on . Posted in Publications. 3 Comments on New publications: A study of water markets in Bangladesh

Domestic rice and wheat production in Bangladesh has more than doubled in the last 30 years, despite declining per capita arable land. The fact that the country is now almost self-sufficient in staple food production is due in large part to successful and rapid adoption of modern, high-yielding crop varieties. This has been widely documented, but less attention has been paid to the contribution of small-scale irrigation systems, whose proliferation has enabled double rice cropping and a competitive market system in which farmers can purchase irrigation services from private pump owners at affordable rates.

However, excess groundwater abstraction in areas of high shallow tube-well density and increased fuel costs for pumping have called into question the sustainability of Bangladesh’s groundwater irrigation economy. Cost-saving agronomic methods are called for, alongside aligned policies, markets, and farmers’ incentives.

A recent study by researchers at the International Maize and Wheat Improvement Center (CIMMYT) examines the different institutions and water-pricing methods for irrigation services that have emerged in Bangladesh, each of which varies in their incentive structure for water conservation, and the level of economic risk involved for farmers and service providers.

Using primary data collected from 139 irrigation service providers and 556 client-farmers, the authors assessed the structure of irrigation service types as well as the associated market and institutional dimensions. They found that competition between pump owners, social capital, and social relationship between of pump owners and client farmers, significantly influence the structure of irrigation services and irrigation water pricing methods. Greater competition between pump owners, for instance, increases the likelihood of pay-per-hour services while reducing that of crop sharing arrangements.

Based on these and other findings, authors made policy recommendations for enhancing irrigation services and sustainability in Bangladesh. As Bangladesh is already highly successful in terms of the conventional irrigation system, the authors urge taking it to the next level for sustainability and efficiency.

Currently Bangladesh’s irrigation system is based on centrifugal pumps and diesel engines. The authors suggest scaling out the energy efficient axial flow pump, and the alternate wetting and drying system for water conservation and irrigation efficiency. They also recommend further investment in rural electrification to facilitate the use of electric motors, which can reduce air pollution by curbing dependency on diesel engines.

Read the full article:
“Understanding clients, providers and the institutional dimensions of irrigation services in developing countries: A study of water markets in Bangladesh” in Agricultural Water Management, Volume 222, 1 August 2019, pages 242-253.

This study was made possible through the support provided by the United States Agency for International Development (USAID) and the Bill & Melinda Gates Foundation to the Cereal Systems Initiative for South Asia (CSISA). Additional support was provided by the CGIAR Research Programs on Maize (MAIZE) and Wheat (WHEAT).

Local irrigation service providers in southern Bangladesh demonstrate the use of a two-wheeled tractor to power an axial flow pump to provide fuel-efficient surface water irrigation. (Photo: Tim Krupnik/CIMMYT)
Local irrigation service providers in southern Bangladesh demonstrate the use of a two-wheeled tractor to power an axial flow pump to provide fuel-efficient surface water irrigation. (Photo: Tim Krupnik/CIMMYT)

Read more recent publications by CIMMYT researchers:

  1. A spatial framework for ex-ante impact assessment of agricultural technologies. 2019. Andrade, J.F., Rattalino Edreira, J.I., Farrow, A., Loon, M.P. van., Craufurd, P., Rurinda, J., Shamie Zingore, Chamberlin, J., Claessens, L., Adewopo, J., Ittersum, M.K. van, Cassman, K.G., Grassini, P. In: Global Food Security v. 20, p. 72-81.
  2. Assessing genetic diversity to breed competitive biofortified wheat with enhanced grain ZN and FE concentrations. 2019. Velu, G., Crespo-Herrera, L.A., Guzman, C., Huerta-Espino, J., Payne, T.S., Singh, R.P. In: Frontiers in Plant Science v. 9, art. 1971.
  3. Genome-wide association mapping and genomic prediction analyses reveal the genetic architecture of grain yield and flowering time under drought and heat stress conditions in maize. 2019. Yibing Yuan, Cairns, J.E., Babu, R., Gowda, M., Makumbi, D., Magorokosho, C., Ao Zhang, Yubo Liu, Nan Wang, Zhuanfang Hao, San Vicente, F.M., Olsen, M., Prasanna, B.M., Yanli Lu, Zhang, X. In: Plant Breeding v. 9, art. 1919.
  4. Diversifying conservation agriculture and conventional tillage cropping systems to improve the wellbeing of smallholder farmers in Malawi. 2019. TerAvest, D., Wandschneider, P.R., Thierfelder, C., Reganold, J.P. In: Agricultural Systems v. 171, p. 23-35.
  5. Biofortified maize can improve quality protein intakes among young children in southern Ethiopia. 2019. Gunaratna, N.S., Moges, D., De Groote, H. Nutrients v. 11, no. 1, art. 192.
Intercropping options for mitigating fall armyworm damage. (Photo: C. Thierfelder/CIMMYT)

New publications: Agro-ecological options for fall armyworm management

Written by Emma Orchardson on . Posted in Publications. 1 Comment on New publications: Agro-ecological options for fall armyworm management

Fall armyworm, a voracious pest now present in both Africa and Asia, has been predicted to cause up to $13 billion per year in crop losses in sub-Saharan Africa, threatening the livelihoods of millions of farmers throughout the region.

“In their haste to limit the damage caused by the pest, governments in affected regions may promote indiscriminate use of chemical pesticides,” say the authors of a recent study on fall armyworm management. “Aside from human health and environmental risks,” they explain, “these could undermine smallholder pest management strategies that depend largely on natural enemies.”

Agro-ecological approaches offer culturally appropriate, low-cost pest control strategies that can be easily integrated into existing efforts to improve smallholder incomes and resilience through sustainable intensification. Researchers suggest these should be promoted as a core component of integrated pest management programs in combination with crop breeding for pest resistance, classical biological control and selective use of safe pesticides.

However, the suitability of agro-ecological measures for reducing fall armyworm densities and impact must be carefully assessed across varied environmental and socioeconomic conditions before they can be proposed for wide-scale implementation.

To support this process, researchers at the International Maize and Wheat Improvement Center (CIMMYT) reviewed evidence for the efficacy of potential agro-ecological measures for controlling fall armyworm and other pests, consider the associated risks and draw attention to critical knowledge gaps. Findings from the Africa-wide study indicate that several measures can be adopted immediately, such as sustainable soil management, intercropping with appropriately selected companion plants and the diversification of farm environments through management of habitats at multiple spatial scales.

Read the full article “Agro-ecological options for fall armyworm (Spodoptera frugiperda JE Smith) management: Providing low-cost, smallholder friendly solutions to an invasive pest” in the Journal of Environmental Management, Volume 243, 1 August 2019, pages 318-330.

Intercropping options for mitigating fall armyworm damage. (Photo: C. Thierfelder/CIMMYT)
Intercropping options for mitigating fall armyworm damage. (Photo: C. Thierfelder/CIMMYT)

Read more recent publications by CIMMYT researchers:

  1. Impact of conservation tillage in rice–based cropping systems on soil aggregation, carbon pools and nutrients. 2019. Rajiv Nandan, Vikram Singh, Sati Shankar Singh, Kumar, V., Kali Krishna Hazra, Chaitanya Prasad Nath, Poonia, S. P., Malik, R.K., Ranjan Bhattacharyya, McDonald, A. In: Geoderma v. 340, p. 104-114.
  2. Integrating genomic-enabled prediction and high-throughput phenotyping in breeding for climate-resilient bread wheat. 2019. Juliana, P., Montesinos-Lopez, O.A., Crossa, J., Mondal, S., Gonzalez-Perez, L., Poland, J., Huerta-Espino, J., Crespo-Herrera, L.A., Velu, G., Dreisigacker, S., Shrestha, S., Perez-Rodriguez, P., Pinto Espinosa, F., Singh, R.P. In: Theoretical and Applied Genetics v. 132, no. 1, p. 177-194.
  3. Modeling copy number variation in the genomic prediction of maize hybrids. 2019. Hottis Lyra, D., Galli, G., Couto Alves, F., Granato, I.S.C., Vidotti, M.S., Bandeira e Sousa, M., Morosini, J.S., Crossa, J., Fritsche-Neto, R. In: Theoretical and Applied Genetics v. 132, no. 1, p. 273-288.
  4. Soil dwelling beetle community response to tillage, fertilizer and weeding intensity in a sub-humid environment in Zimbabwe. 2019. Mashavakure, N., Mashingaidze, A.B., Musundire, R., Nhamo, N., Gandiwa, E., Thierfelder, C., Muposhi, V.K. In: Applied Soil Ecology v. 135, p. 120-128.
  5. Two main stripe rust resistance genes identified in synthetic-derived wheat line soru#1. 2019. Ruiqi Zhang, Singh, R.P., Lillemo, M., Xinyao He., Randhawa, M.S., Huerta-Espino, J., Singh, P.K., Zhikang Li, Caixia Lan. In: Phytopathology v. 109, no. 1, p. 120-126.

Book launch: Lead farmers in eastern and southern Africa

Written by Carolyn Cowan on . Posted in News. 1 Comment on Book launch: Lead farmers in eastern and southern Africa

Tackling the challenges of climate change and increasing scarcity of resources like arable land and water requires that farming and food systems around the world undergo fundamental shifts in thinking and practices. A new book draws on experiences of men and women farmers across eastern and southern Africa who have been associated with the Sustainable Intensification of Maize-Legume Systems for Food Security in Eastern and Southern Africa (SIMLESA) project. The inspiring and moving accounts tell the story of how these farmers have bravely embraced change to improve their farming methods and consequently the lives and livelihoods of their families.

The maize-growing regions of southern and eastern Africa face many challenges, including lower than average yields, crop susceptibility to pests and diseases, and abiotic stresses such as droughts that can be frequent and severe. There is also widespread lack of access to high-yielding stress resilient improved seed and other farming innovations, presenting a need for scalable technologies, adapted to farmers’ growing conditions.

Maize is the most important staple crop in the region, feeding more than 200-300 million people across Africa and providing food and income security to millions of smallholder farmers. Prioritization of cost reducing, yield enhancing and resource conserving farming methods is vital to catalyze a shift towards sustainable and resilient maize agri-food systems. Conservation agriculture (CA) is one promising approach.

Launched in 2010, SIMLESA is led by the International Maize and Wheat Improvement Center (CIMMYT) and funded by the Australian Center for International Agricultural Research (ACIAR). The project supports farmers and partner organizations to achieve increased food production while minimizing pressure on the environment by using smallholder farmers’ resources more efficiently through CA approaches. SIMLESA is implemented by national agricultural research systems, agribusinesses and farmers in partner countries including, Ethiopia, Kenya, Malawi, Mozambique, Rwanda, Tanzania and Uganda.

The farmers’ words in this book drive home the core philosophy of SIMLESA: that critical paradigm shifts in smallholder farming are possible and can lead to positive and potentially lasting impacts.

The candid accounts of the benefits yielded from adopting new practices like CA are a testimony to this idea:  “Now we have seen with our own eyes these new methods are beneficial, and we want to continue what we are doing….my field is a school where others can learn,” said Maria Gorete, a farmer in Mozambique.

Policy makers and scientists from eastern and southern Africa met in Uganda at a regional forum convened by the Association for Strengthening Agricultural Research in Eastern and Central Africa (ASARECA), on 3-4 May 2019. The forum discussed ways to scale up the learnings of SIMLESA and a joint communique recommending policy actions was signed by the Ministers of Agriculture of the Republic of Burundi, the Republic of the Congo, the Democratic Republic of Congo, the State of Eritrea, the Federal Democratic Republic of Ethiopia, the Republic of Kenya, the Republic of Madagascar,  the Republic of Rwanda, the Republic of South Sudan, the Republic of the Sudan, the United Republic of Tanzania, the Republic of Uganda, the Republic of Malawi and the Republic of Mozambique of the high level Ministerial Panel on Sustainable Intensification of Maize-Legume Cropping Systems for Food Security in Eastern and Southern Africa (SIMLESA).

Farmers in Bangladesh practice traditional puddling of the soil before transplanting rice. (Photo: P. Wall/CIMMYT)

New publications: Small businesses, potentially large impacts

Written by Emma Orchardson on . Posted in Publications.

A recent study by socioeconomists at the International Maize and Wheat Improvement Center (CIMMYT) in Bangladesh examined the role of fertilizer traders in influencing farmer decision-making on which fertilizer to apply and at what rate.

In developing countries, the emerging private sector is gradually filling the gap between supply and demand of agricultural extension services. In Bangladesh, most farmers still rely on either their own experience or that of their peers, but increasingly seek suggestions from traders when deciding on the amount and dose of fertilizer to be applied, due to the constraints associated with public agricultural extension services. These private fertilizer traders are increasingly prominent as information sources in the more accessible, intensive and commercially-oriented boro rice production systems.

Using primary data collected from 556 randomly selected farm households in Bangladesh, the study examined farmers’ chemical fertilizer use and the associated rice production efficiency based on different information sources that farmers rely on, such as fertilizer traders, government extension agents, and personal experience.

The research show that farmers who relied on traders statistically had a higher production efficiency than those who did not. These results suggest that fertilizer traders are in fact supplementing government agricultural extension activities by providing useful information which supports resource-poor farmers to mitigate market failures and achieve higher production efficiency.

Read the full article “Small businesses, potentially large impacts: the role of fertilizer traders as agricultural extension agents in Bangladesh” in the Journal of Agribusiness in Developing and Emerging Economies.

This study was supported by USAID through the Cereal Systems Initiative for South Asia – Mechanization and Irrigation (CSISA-MI) project, as well as USAID and Bill & Melinda Gates Foundation through the second phase of the CSISA project.

Farmers in Bangladesh practice traditional puddling of the soil before transplanting rice. (Photo: P. Wall/CIMMYT)
Farmers in Bangladesh practice traditional puddling of the soil before transplanting rice. (Photo: P. Wall/CIMMYT)

Read more recent publications by CIMMYT researchers:

  1. Ten years of conservation agriculture in a rice–maize rotation of Eastern Gangetic Plains of India: yield trends, water productivity and economic profitability. 2019. Jat, R.K., Ravi Gopal Singh, Kumar, M., Jat, M.L., Parihar, C.M., Bijarniya, D., Sutaliya, J.M., Jat, M.K., Parihar M.D., Kakraliya Suresh Kumar, Gupta, R.K. In: Field Crops Research v. 232, p. 1-10.
  2. Exploiting genotype x environment x management interactions to enhance maize productivity in Ethiopia. 2019. Seyoum, S., Rachaputi, R., Fekybelu, S., Chauhan, Y., Prasanna, B.M. In: European Journal of Agronomy v. 103, p. 165-174.
  3. Yield response to plant density, row spacing and raised beds in low latitude spring wheat with ample soil resources: an update. 2019. Fischer, R.A., Moreno Ramos, O.H., Ortiz-Monasterio, I., Sayre, K.D. In: Field Crops Research v. 232, p. 95-105.
Maize infected with the fungus Aspergillus flavus, causing ear rot and producing aflatoxins. (Photo: George Mahuku/CIMMYT)

New publications: Biofortification of maize with provitamin A can reduce aflatoxin load

Written by Carolyn Cowan on . Posted in Publications.

Maize infected with the fungus Aspergillus flavus, causing ear rot and producing aflatoxins. (Photo: George Mahuku/CIMMYT)
Maize infected with the fungus Aspergillus flavus, causing ear rot and producing aflatoxins. (Photo: George Mahuku/CIMMYT)

New research evidence could have significant implications for breeding approaches to combat harmful aflatoxin contamination in maize while simultaneously contributing to alleviate vitamin A deficiency. The study “Provitamin A Carotenoids in Grain Reduce Aflatoxin Contamination of Maize While Combating Vitamin A Deficiency” is the first published report to document how biofortification with provitamin A can contribute to reduce aflatoxin contamination in maize.

Aflatoxins are harmful compounds that are produced by the fungus Aspergillus flavus, which can be found in the soil, plants and grain of a variety of legumes and cereals including maize. Toxic to humans and animals, aflatoxins are associated with liver and other types of cancer, as well as with weakened immune systems that result in increased burden of disease, micronutrient deficiencies, and stunting or underweight development in children.

Efforts to breed maize varieties with resistance to aflatoxin contamination have proven difficult and elusive. Contamination of maize grain and products with aflatoxin is especially prevalent in low- and middle-income countries where monitoring and safety standards are inconsistently implemented.

Biofortification also serves to address “hidden hunger,” or micronutrient deficiency. Over two billion people are affected globally — they consume a sufficient amount of calories but lack essential micronutrients such as vitamins and minerals. Vitamin A deficiency specifically compromises the health of millions of maize consumers around the world, including large parts of sub-Saharan Africa.

Provitamin A-enriched maize is developed by increasing the concentration of carotenoids — the precursors of vitamin A — and powerful antioxidants that play important roles in reducing the production of aflatoxin by the fungus Aspergillus flavus. The relative ease of breeding for increased concentrations of carotenoids as compared to breeding for aflatoxin resistance in maize make this finding especially significant as part of a solution to aflatoxin contamination problems.

Breeding of provitamin A-enriched maize varieties is ongoing at the International Maize and Wheat Improvement Center (CIMMYT) and the International Institute of Tropical Agriculture (IITA), with the support of HarvestPlus. Several varieties trialed in sub-Saharan Africa have demonstrated their potential to benefit vitamin-deficient maize consumers.

The researchers highlight the potential in breeding maize with enhanced levels of carotenoids to yield the dual health benefits of reduced aflatoxin concentration in maize and reduced rates of vitamin A deficiency. This result is especially significant for countries where the health burdens of exposure to aflatoxin and prevalence of vitamin A deficiency converge with high rates of maize consumption.

Read the full study here: https://www.frontiersin.org/articles/10.3389/fpls.2019.00030/full

Financial support for this study was partially provided by HarvestPlus, a global alliance of agriculture and nutrition research institutions working to increase the micronutrient density of staple food crops through biofortification. The views expressed do not necessarily reflect those of HarvestPlus. The CGIAR Research Program on Maize (MAIZE) also supported this research.

This research builds on the Ph.D. dissertation of Dr. Pattama Hannok at University of Wisconsin, Madison, WI, United States (Hannok, 2015).

New publications: Identifying common genetic bases for yield, biomass and radiation use efficiency in spring wheat

Written by Courtney Brantley on . Posted in Publications.

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For plant scientists, increasing wheat yield potential is one of the most prevalent challenges of their work. One key strategy for increasing yield is to improve the plant’s ability to produce biomass through optimizing the conversion of solar radiation into plant structures and grain, called radiation use efficiency (RUE). Currently, the process is 30-50% less efficient in wheat than in maize.

International Maize and Wheat Improvement Center (CIMMYT) wheat physiologist Gemma Molero, in collaboration with Ryan Joynson and Anthony Hall of the Earlham Institute, has been studying the association of RUE related traits with molecular markers to identify specific genes associated with this trait.

In December 2018, her team published their results in the article “Elucidating the genetic basis of biomass accumulation and radiation use efficiency in spring wheat and its role in yield potential,” shedding light on some of the genetic bases of biomass accumulation and RUE in a specially designed panel of lines that included material with diverse expression of RUE over the wheat crop cycle.

Over the course of two years, Molero and fellow researchers evaluated a panel of 150 elite spring wheat genotypes for 31 traits, looking for marker traits associated with yield and other “sink”-related traits, such as, grain number, grain weight and harvest index, along with ‘’source’’-related traits, such as RUE and biomass at various growth stages.  Many of the elite wheat lines that were tested encompass “exotic” material in their pedigree such as ancient wheat landraces and wheat wild relatives.

The scientists found that increases in both net rate of photosynthesis and RUE have the potential to make a large impact on wheat biomass, demonstrating that the use of exotic material is a valuable resource to help increase yield potential. This is the first time that a panel of elite wheat lines has been assembled using different sources of yield potential traits, and an important output from a large global endeavor to increase wheat yield, the International Wheat Yield Partnership (IWYP).

“We identified common genetic bases for yield, biomass and RUE for the first time. This has important implications for wheat researchers, breeders, geneticists, plant scientists and biologists,” says Molero.

The identification of molecular markers associated with the studied traits is a valuable tool for wheat improvement. Broadly speaking, the study opens the door for a series of important biological questions about the role of RUE in yield potential and in the ability to increase grain biomass.

In order to accommodate worldwide population increases and shifts in diet, wheat yield needs to double by 2050 — and genetic gains in wheat, specifically, must increase at a rate of 2.4 percent annually. Increasing biomass through the optimization of RUE along the wheat crop cycle can be an important piece in the puzzle to help meet this demand.

Read the full study here.

Check out other recent publications by CIMMYT researchers below:

  1. A loop-mediated isothermal amplification (LAMP) assay for the rapid detection of toxigenic Fusarium temperatum in maize stalks and kernels. 2019. Liuying Shan, Hafiz Abdul Haseeb, Jun Zhang, Dandan Zhang, Jeffers, D.P., Xiaofeng Dai, Wei Guo. In: International Journal of Food Microbiology v. 291, p. 72-78.
  2. Adoption of drought tolerant maize varieties under rainfall stress in Malawi. 2019. Katengeza, S.P., Holden, S.T., Lunduka, R. In: Journal of Agricultural Economics v. 70, no. 1, p. 198-214.
  3. Alternative use of wheat land to implement a potential wheat holiday as wheat blast control : in search of feasible crops in Bangladesh. 2019. Mottaleb, K.A., Singh, P.K., Xinyao He, Akbar Hossain, Kruseman, G., Erenstein, O. In: Land Use Policy v. 82, p. 1-12.
  4. Business models of SMEs as a mechanism for scaling climate smart technologies : the case of Punjab, India. 2019. Groot, A.E., Bolt, J.S., Jat, H.S., Jat, M.L., Kumar, M., Agarwal, T., Blok, V. In: Journal of Cleaner Production v. 210, p. 1109-1119.
  5. Climate change impact and adaptation for wheat protein. 2019. Asseng, S., Martre, P., Maiorano, A., Rotter, R., O’Leary, G.J., Fitzgerald, G., Girousse, C., Motzo, R., Giunta, F., M. Ali Babar, Reynolds, M.P., Kheir, A.M.S., Thorburn, P.J., Waha, K., Ruane, A.C., Aggarwal, P.K., Mukhtar Ahmed, Balkovic, J., Basso, B., Biernath, C., Bindi, M., Cammarano, D., Challinor, A.J., De Sanctis, G., Dumont, B., Eyshi Rezaei, E., Fereres, E., Ferrise, R., Garcia-Vila, M., Gayler, S., Yujing Gao, Horan, H., Hoogenboom, G., Izaurralde, R.C., Jabloun, M., Jones, C.D., Kassie, B.T., Kersebaum, K.C., Klein, C., Koehler, A.K., Bing Liu, Minoli, S., Montesino San Martin, M., Muller, C., Soora Naresh Kumar, Nendel, C., Olesen, J.E., Palosuo, T., Porter, J.R., Priesack, E., Ripoche, D., Semenov, M.A., Stockle, C., Stratonovitch, P., Streck, T., Supit, I., Fulu Tao, Van der Velde, M., Wallach, D., Wang, E., Webber, H., Wolf, J., Liujun Xiao, Zhao Zhang, Zhigan Zhao, Yan Zhu, Ewert, F. In: Global Change Biology v. 25, no. 1, p. 155-173.
  6. Corrigendum to “greenhouse gas emissions from agricultural food production to supply Indian diets : implications for climate change mitigation” [agric. ecosyst. environ. 237 (2017) 234–241]. 2019. Vetter, S.H., Sapkota, T.B., Hillier, J., Stirling, C., Macdiarmid, J.I., Aleksandrowicz, L., Green, R., Joy, E.J.M., Dangour, A.D., Smith, P. In: Agriculture, Ecosystems and Environment v. 272, p. 83-85.
  7. Cost-effective opportunities for climate change mitigation in Indian agriculture. 2019. Sapkota, T.B., Vetter, S.H., Jat, M.L., Smita P.S. Sirohi, Shirsath, P.B., Singh, R., Jat, H.S., Smith, P., Hillier, J., Stirling, C. In: Science of the Total Environment v. 655, p. 1342-1354.
  8. Crop season planning tool : adjusting sowing decisions to reduce the risk of extreme weather events. 2019. Perondi, D., Fraisse, C.W., Staub, C.G., Cerbaro, V.A., Barreto, D.D., Pequeño, D.N.L., Mulvaney, M.J., Troy, P., Pavan, W.O. In: Computers and Electronics in Agriculture v. 156, p. 62-70.
  9. Microsatellite analysis and urediniospore dispersal simulations support the movement of Puccinia graminis f. sp. tritici from Southern Africa to Australia. 2019. Visser, B., Meyer, M., Park, R.F., Gilligan, C.A., Burgin, L., Hort, M.C., Hodson, D.P., Pretorius, Z.A. In: Phytopathology v. 109, no. 1, p. 133-144.
  10. Opportunities for wheat cultivars with superior straw quality traits targeting the semi-arid tropics. 2019. Joshi, A.K., Barma, N.C.D., Abdul Hakim, M., Kalappanavar, I.K., Vaishali Rudra Naik, Suma S. Biradar., Prasad, S.V.S., Singh, R.P., Blummel, M. Field Crops Research v. 231, p. 51-56.
  11. Spider community shift in response to farming practices in a sub-humid agroecosystem of southern Africa. 2019. Mashavakure, N., Mashingaidze, A.B., Musundire, R., Nhamo, N., Gandiwa, E., Thierfelder, C., Muposhi, V.K. In: Agriculture, Ecosystems and Environment v. 272, p. 237-245.
Dinke Abebe shows a handful of wheat at a traditional seed storage house in Boru Lencha village, Hetosa district, Arsi highlands, Ethiopia. (Photo: Peter Lowe/CIMMYT)

New publications: Gender and agricultural innovation in Oromia region, Ethiopia

Written by Emma Orchardson on . Posted in Publications.

Despite formal decentralization, agricultural services in Ethiopia are generally “top-down,” claim the authors of a recently published paper on gender and agricultural innovation. “Extension services,” they explain, “are supply-driven, with off-the-shelf technologies transferred to farmers without expectation of further adaptation.”

Drawing on GENNOVATE case studies from two wheat-growing communities in Ethiopia’s Oromia region, the authors examine how a small sample of women and men smallholders attempt to innovate with improved wheat seed, row planting, and the broad bed maker, introduced through the Ethiopian agricultural extension system. They also introduce the concept of tempered radicals, an analytic lens used to understand how individuals try to initiate change processes, and assess whether this can have validity in rural settings.

Dinke Abebe shows a handful of wheat at a traditional seed storage house in Boru Lencha village, Hetosa district, Arsi highlands, Ethiopia. (Photo: Peter Lowe/CIMMYT)
Dinke Abebe shows a handful of wheat at a traditional seed storage house in Boru Lencha village, Hetosa district, Arsi highlands, Ethiopia. (Photo: Peter Lowe/CIMMYT)

As the authors demonstrate through their literature review on cultural norms in the region, there are powerful institutional gender constraints to change processes, which can be punitive for women.

Ethiopian women smallholders are particularly disadvantaged because they have limited access to productive assets such as irrigation water, credit and extension services. Therefore, they find it harder to implement innovations. The study asserts that strategies to support innovators, and women innovators in particular, must be context-specific as well as gender-sensitive.

Read the full article “Gender and agricultural innovation in Oromia region, Ethiopia: from innovator to tempered radical” in Gender, Technology and Development.

Development of research methodology and data collection was supported by the CGIAR Gender and Agricultural Research Network, the World Bank, the Government of Mexico, the Government of Germany, and the CGIAR Research Programs on Maize and Wheat. Data analysis was supported by the Bill & Melinda Gates Foundation.

Check out other recent publications by CIMMYT researchers below:

  1. Alternative use of wheat land to implement a potential wheat holiday as wheat blast control: in search of feasible crops in Bangladesh. 2019. Mottaleb, K.A., Singh, P.K., Xinyao He, Akbar Hossain, Kruseman, G., Erenstein, O. In: Land Use Policy v. 82, p. 1-12.
  2. Applications of machine learning methods to genomic selection in breeding wheat for rust resistance. 2019. González-Camacho, J.M., Ornella, L., Perez-Rodriguez, P., Gianola, D., Dreisigacker, S., Crossa, J. In: Plant Genome v. 11, no. 2, art. 170104.
  3. Genetic diversity and population structure of synthetic hexaploid-derived wheat (Triticum aestivum L.) accessions. 2019. Gordon, E., Kaviani, M., Kagale, S., Payne, T.S., Navabi, A. In: Genetic Resources and Crop Evolution v. 66, no. 2, p. 335-348.
  4. Genomic-enabled prediction accuracies increased by modeling genotype × environment interaction in durum wheat. 2019. Sukumaran, S., Jarquín, D., Crossa, J., Reynolds, M.P. In: Plant Genome v. 11, no. 2, art. 170112.
  5. Improved water-management practices and their impact on food security and poverty: empirical evidence from rural Pakistan. 2019. Ali, A., Rahut, D.B., Mottaleb, K.A. En: Official Journal of the World Water Council Water Policy v. 20, no. 4, p. 692-711.
  6. Integrating genomic-enabled prediction and high-throughput phenotyping in breeding for climate-resilient bread wheat. 2019. Juliana, P., Montesinos-Lopez, O.A., Crossa, J., Mondal, S., Gonzalez-Perez, L., Poland, J., Huerta-Espino, J., Crespo-Herrera, L.A., Velu, G., Dreisigacker, S., Shrestha, S., Perez-Rodriguez, P., Pinto Espinosa, F., Singh, R.P. In: Theoretical and Applied Genetics v. 132, no. 1, p. 177-194.
  7. Pre-harvest management is a critical practice for minimizing aflatoxin contamination of maize. 2019. Mahuku, G., Nzioki, H., Mutegi, C., Kanampiu, F., Narrod, C., Makumbi, D. In: Food Control v. 96, p. 219-226.
  8. Root-lesion nematodes in cereal fields: importance, distribution, identification, and management strategies. 2019. Mokrini, F., Viaene, N., Waeyenberge, L., Dababat, A.A., Moens, M. In: Journal of Plant Diseases and Protection v. 126, no. 1, p. 1-11.
  9. Spider community shift in response to farming practices in a sub-humid agroecosystem of southern Africa. 2019. Mashavakure, N., Mashingaidze, A.B., Musundire, R., Nhamo, N., Gandiwa, E., Thierfelder, C., Muposhi, V.K. In: Agriculture, Ecosystems and Environment v. 272, p. 237-245.
  10. Threats of tar spot complex disease of maize in the United States of America and its global consequences. 2019. Mottaleb, K.A., Loladze, A., Sonder, K., Kruseman, G., San Vicente, F.M. In: Mitigation and Adaptation Strategies for Global Change v. 24, no. 2, p. 281–300.

New publications: Role of Modelling in International Crop Research

Written by Emma Orchardson on . Posted in Publications.

“Crop modelling has the potential to significantly contribute to global food and nutrition security,” claim the authors of a recently published paper on the role of modelling in international crop research.  “Millions of farmers, and the societies that depend on their production, are relying on us to step up to the plate.”

Among other uses, crop modelling allows for foresight analysis of agricultural systems under global change scenarios and the prediction of potential consequences of food system shocks. New technologies and conceptual breakthroughs have also allowed modelling to contribute to a better understanding of crop performance and yield gaps, improved predictions of pest outbreaks, more efficient irrigation systems and the optimization of planting dates.

While renewed interest in the topic has led in recent years to the development of collaborative initiatives such as the Agricultural Model Intercomparison and Improvement Project (AgMIP) and the CGIAR Platform for Big Data in Agriculture, further investment is needed in order to improve the collection of open access, easy-to-use data available for crop modelling purposes. Strong impact on a global scale will require a wide range of stakeholders – from academia to the private sector – to contribute to the development of large, multi-location datasets.

Resource-poor farmers worldwide stand to gain from developments in the field of crop modelling. Photo: H. De Groote/CIMMYT.
Resource-poor farmers worldwide stand to gain from developments in the field of crop modelling. (Photo: H. De Groote/CIMMYT)

In “Role of Modelling in International Crop Research: Overview and Some Case Studies,” CGIAR researchers outline the history and basic principles of crop modelling, and describe major theoretical advances and their practical applications by international crop research centers. They also highlight the importance of agri-food systems, which they view as key to meeting global development challenges. “The renewed focus on the systems-level has created significant opportunities for modelers to participant in enhancing the impact of science on developments. However, a coherent approach based on principles of transparency, cooperation and innovation is essential to achieving this.”

The authors call for closer interdisciplinary collaboration to better serve the crop research and development communities through the provision of model-based recommendations which could range from government-level policy development to direct crop management support for resource-poor farmers.

Read the full article in Agronomy 2018, Volume 8 (12).

Check out other recent publications by CIMMYT researchers below:

  1. A framework for priority-setting in climate smart agriculture research. 2018. Thornton, P.K., Whitbread, A., Baedeker, T., Cairns, J.E., Claessens, L., Baethgen, W., Bunn, C., Friedmann, M., Giller, K.E., Herrero, M., Howden, M., Kilcline, K., Nangia, V., Ramirez Villegas, J., Shalander Kumar, West, P.C., Keating, B. In: Agricultural Systems v. 167, p. 161-175.
  2. Cereal consumption and marketing responses by rural smallholders under rising cereal prices. 2018. Mottaleb, K.A., Rahut, D.B. In: Journal of Agribusiness in Developing and Emerging Economies v. 8, no. 3, p. 461-479.
  3. Community typology framed by normative climate for agricultural innovation, empowerment, and poverty reduction. 2018. Petesch, P., Feldman, S., Elias, M., Badstue, L.B., Dina Najjar, Rietveld, A., Bullock, R., Kawarazuka, N., Luis, J. In: Journal of Gender, Agriculture and Food Security v. 3, no. 1, p. 131-157.
  4. Fit for purpose? A review of guides for gender-equitable value chain development. 2018. Stoian, D., Donovan, J.A., Elias, M., Blare, T. In: Development in Practice v. 28, no. 4, p. 494-509.
  5. Gendered aspirations and occupations among rural youth, in agriculture and beyond: a cross-regional perspective. 2018. Elias, M., Netsayi Mudege, Lopez, D.E., Dina Najjar, Kandiwa, V., Luis, J., Jummai Yila, Amare Tegbaru, Gaya Ibrahim, Badstue, L.B., Njuguna-Mungai, E., Abderahim Bentaibi. In: Journal of Gender, Agriculture and Food Security v. 3, no. 1, p. 82-107.
  6. Genome-wide association study reveals novel genomic regions for grain yield and yield-related traits in drought-stressed synthetic hexaploid wheat. 2018. Bhatta, M.R., Morgounov, A.I., Belamkar, V., Baenziger, P.S. In: International Journal of Molecular Sciences v. 19, no. 10, art. 3011.
  7. Identificacion de areas potenciales en Mexico para la intervencion con maiz biofortificado con zinc = Identification of potential areas in Mexico for intervention with biofortified high-zinc maize. 2018. Ramirez-Jaspeado, R., Palacios-Rojas, N., Salomon, P., Donnet, M.L. In: Revista Fitotecnia Mexicana v. 4, no. 3, p. 327 – 337.
  8. Impact of climate-change risk-coping strategies on livestock productivity and household welfare: empirical evidence from Pakistan. 2018. Rahut, D.B., Ali, A. In: Heliyon v. 4, no. 10, art. e00797.
  9. Impact of conservation agriculture on soil physical properties in rice-wheat system of eastern indo-gangetic plains. 2018. Kumar, V., Kumar, M., Singh, S.K., Jat, R.K. In: Journal of Animal and Plant Sciences v. 28, no. 5, p. 1432-1440.
  10. Impact of ridge-furrow planting in Pakistan: empirical evidence from the farmer’s field. 2018. Hussain, I., Ali, A., Ansaar Ahmed, Hafiz Nasrullah, Badar ud Din Khokhar, Shahid Iqbal, Azhar Mahmood Aulakh, Atta ullah Khan, Jamil Akhter, Gulzar Ahmed. In: International Journal of Agronomy v. 2018, art. 3798037.
  11. Introduction to special issue: smallholder value chains as complex adaptive systems. 2018. Orr, A., Donovan, J.A. In: Journal of Agribusiness in Developing and Emerging Economies v. 8, no. 1, p. 2-13.
  12. Local dynamics of native maize value chains in a peri-urban zone in Mexico: the case of San Juan Atzacualoya in the state of Mexico. 2018. Boue, C., Lopez-Ridaura, S., Rodriguez Sanchez, L.M., Hellin, J. J., Fuentes Ponce, M. In: Journal of Rural Studies v. 64, p. 28-38.
  13. Local normative climate shaping agency and agricultural livelihoods in sub-Saharan Africa. 2018. Petesch, P., Bullock, R., Feldman, S., Badstue, L.B., Rietveld, A., Bauchspies, W., Kamanzi, A., Amare Tegbaru, Jummai Yila. In: Journal of Gender, Agriculture and Food Security v. 3, no. 1, p. 108-130.
  14. Maize seed systems in different agro-ecosystems; what works and what does not work for smallholder farmers. 2018. Hoogendoorn, C., Audet-Bélanger, G., Boeber, C., Donnet, M.L., Lweya, K.B., Malik, R., Gildemacher, P. In: Food security v. 10, no. 4, p. 1089–1103.
  15. Mapping adult plant stem rust resistance in barley accessions Hietpas-5 and GAW-79. 2018. Case, A.J., Bhavani, S., Macharia, G., Pretorius, Z.A., Coetzee, V., Kloppers, F.J., Tyagi, P., Brown-Guedira, G., Steffenson, B.J. In: Theoretical and Applied Genetics v. 131, no. 10, p. 2245–2266.
  16. Potential for re-emergence of wheat stem rust in the United Kingdom. 2018. Lewis, C.M., Persoons, A., Bebber, D.P., Kigathi, R.N., Maintz, J., Findlay, K., Bueno-Sancho, V., Corredor-Moreno, P., Harrington, S.A., Ngonidzashe Kangara, Berlin, A., Garcia, R., German, S.E., Hanzalova, A., Hodson, D.P., Hovmoller, M.S., Huerta-Espino, J., Imtiaz, M., Mirza, J.I., Justesen, A.F., Niks, R.E., Ali Omrani., Patpour, M., Pretorius, Z.A., Ramin Roohparvar, Hanan Sela, Singh, R.P., Steffenson, B.J., Visser, B., Fenwick, P., Thomas, J., Wulff, B.B.H.,  Saunders, D.G.O. In: Communications Biology v. 1, art. 13.
  17. Qualitative, comparative, and collaborative research at large scale: an introduction to GENNOVATE. 2018. Badstue, L.B., Petesch, P., Feldman, S., Prain, G., Elias, M., Kantor, P. In: Journal of Gender, Agriculture and Food Security v. 3, no. 1, p. 1-27.
  18. Qualitative, comparative, and collaborative research at large scale: the GENNOVATE field methodology. 2018. Petesch, P., Badstue, L.B., Camfield, L., Feldman, S., Prain, G., Kantor, P. In: Journal of Gender, Agriculture and Food Security v. 3, no. 1, p. 28-53.
  19. Transaction costs, land rental markets, and their impact on youth access to agriculture in Tanzania. 2018. Ricker-Gilbert, J., Chamberlin, J. In: Land Economics v. 94, no. 4, p. 541-555.
  20. What drives capacity to innovate? Insights from women and men small-scale farmers in Africa, Asia, and Latin America. 2018. Badstue, L.B., Lopez, D.E., Umantseva, A., Williams, G.J., Elias, M., Farnworth, C.R., Rietveld, A., Njuguna-Mungai, E., Luis, J., Dina Najjar., Kandiwa, V. In: Journal of Gender, Agriculture and Food Security v. 3, no. 1, p. 54-81.