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Farmers evaluate traits of wheat varieties, Ethiopia. (Photo: Jeske van de Gevel/Bioversity International)

Reaching women with improved maize and wheat

Written by Marcia MacNeil on September 8, 2020. Posted in Features.

By 2050, global demand for wheat is predicted to increase by 50 percent from today’s levels and demand for maize is expected to double. Meanwhile, these profoundly important and loved crops bear incredible risks from emerging pests and diseases, diminishing water resources, limited available land and unstable weather conditions – with climate change as a constant pressure exacerbating all these stresses.

Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG) is a new 5-year project led by the International Maize and Wheat Improvement Center (CIMMYT) that brings together partners in the global science community and in national agricultural research and extension systems to accelerate the development of higher-yielding varieties of maize and wheat.

Funded by the Bill & Melinda Gates Foundation, the UK Foreign, Commonwealth & Development Office, the U.S. Agency for International Development (USAID) and the Foundation for Food and Agriculture Research (FFAR), AGG fuses innovative methods to sustainably and inclusively improve breeding efficiency and precision to produce seed varieties that are climate-resilient, pest- and disease-resistant, highly nutritious, and targeted to farmers’ specific needs.

AGG seeks to respond to the intersection of the climate emergency and gender through gender-intentional product profiles for its improved seed varieties and gender-intentional seed delivery pathways.

AGG will take into account the needs and preferences of female farmers when developing the product profiles for improved varieties of wheat and maize. This will be informed by gender-disaggregated data collection on current varieties and preferred characteristics and traits, systematic on-farm testing in target regions, and training of scientists and technicians.

Farmer Agnes Sendeza harvests maize cobs in Malawi. (Photo: Peter Lowe/CIMMYT)

To encourage female farmers to take up climate-resilient improved seeds, AGG will seek to understand the pathways by which women receive information and improved seed and the external dynamics that affect this access and will use this information to create gender-intentional solutions for increasing varietal adoption and turnover.

“Until recently, investments in seed improvement work have not actively looked in this area,” said Olaf Erenstein, Director of CIMMYT’s Socioeconomics Program at a virtual inception meeting for the project in late August 2020. Now, “it has been built in as a primary objective of AGG to focus on […] strengthening gender-intentional seed delivery systems so that we ensure a faster varietal turnover and higher adoption levels in the respective target areas.”

In the first year of the initiative, the researchers will take a deep dive into the national- and state-level frameworks and policies that might enable or influence the delivery of these new varieties to both female and male farmers. They will analyze this delivery system by mapping the seed delivery paths and studying the diverse factors that impact seed demand. By understanding their respective roles, practices, and of course, the strengths and weaknesses of the system, the researchers can diagnose issues in the delivery chain and respond accordingly.

Once this important scoping step is complete, the team will design a research plan for the following years to understand and influence the seed information networks and seed acquisition. It will be critical in this step to identify some of the challenges and opportunities on a broad scale, while also accounting for the related intra-household decision-making dynamics that could affect access to and uptake of these improved seed varieties.

“It is a primary objective of AGG to ensure gender intentionality,” said Kevin Pixley, Director of CIMMYT’s Genetic Resources Program and AGG project leader. “Often women do not have access to not only inputs but also information, and in the AGG project we are seeking to help close those gaps.”

Cover photo: Farmers evaluate traits of wheat varieties, Ethiopia. (Photo: Jeske van de Gevel/Bioversity International)

Excellence in Agronomy 2030 initiative to launch at African Green Revolution Forum

Written by Mary Donovan on September 4, 2020. Posted in Press releases.

Nine CGIAR centers, supported by the Big Data Platform, will launch the Excellence in Agronomy 2030 initiative on September 7, 2020, during this year’s African Green Revolution Forum (AGRF) online summit.

The Excellence in Agronomy 2030 (EiA 2030) initiative will assist millions of smallholder farmers to intensify their production systems while preserving key ecosystem services under the threat of climate change. This initiative, co-created with various scaling partners, represents the collective resolve of CGIAR’s agronomy programs to transform the world’s food systems through demand- and data-driven agronomy research for development.

EiA 2030 will combine big data analytics, new sensing technologies, geospatial decision tools and farming systems research to improve spatially explicit agronomic recommendations in response to demand from scaling partners. Our science will integrate the principles of Sustainable Intensification and be informed by climate change considerations, behavioral economics, and scaling pathways at the national and regional levels.

A two-year Incubation Phase of EiA 2030 is funded by the Bill & Melinda Gates Foundation. The project will demonstrate the added value of demand-driven R&D, supported by novel data and analytics and increased cooperation among centers, in support of a One CGIAR agronomy initiative aiming at the sustainable intensification of farming systems.

Speaking on the upcoming launch, the IITA R4D Director for Natural Resource Management, Bernard Vanlauwe, who facilitates the implementation of the Incubation Phase, said that “EiA 2030 is premised on demand-driven agronomic solutions to develop recommendations that match the needs and objectives of the end users.”

Christian Witt, Senior Program Officer from the Bill & Melinda Gates Foundation, lauded the initiative as a cornerstone for One CGIAR. “It is ingenious to have a platform like EiA 2030 that looks at solutions that have worked in different settings on other crops and whether they can be applied in a different setting and on different crops,” Witt said.

Martin Kropff, Director General of the International Maize and Wheat Improvement Center (CIMMYT), spoke about the initiative’s goals of becoming the leading platform for next-generation agronomy in the Global South, not only responding to the demand of the public and private sectors, but also increasing efficiencies in the development and delivery of solutions through increased collaboration, cooperation and cross-learning between CGIAR centers and within the broader agronomy R&D ecosystem, including agroecological approaches.

At the EiA 2030 launch, representatives from partner organizations and CGIAR centers will give presentations on different aspects of the project.

CGIAR centers that are involved in EiA include AfricaRice, the International Center for Tropical Agriculture (CIAT), the International Maize and Wheat Improvement Center (CIMMYT), the International Potato Center (CIP), the International Center for Agricultural Research in the Dry Areas (ICARDA), World Agroforestry Center (ICRAF), the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), the International Institute of Tropical Agriculture (IITA), and the International Rice Research Institute (IRRI).

Launch details:

Date: September 7, 2020
Venue: Virtual; online
Time: 3 pm, Central Africa Time (CAT)
Link: To be provided before the event.

For more information contact Bernard Vanlauwe, b.vanlauwe@cgiar.org, or David Ngome, d.ngome@cgiar.org

Follow EiA on Facebook, Twitter and LinkedIn for updates and information.

Building resistance in wheat: International collaboration fights Septoria tritici blotch disease

Written by Alison Doody on September 1, 2020. Posted in News.

Phenotypic selection of resistant lines (Ms. H. Kouki Field technician and consultant A. Yahyaoui) at the Septoria Precision Phenotyping Platform at Kodia/INGC. (Photo: Septoria Precision Phenotyping Platform)

Tunisia has been a major durum wheat producer and consumer since Roman times, a crop used now for couscous, bread and pasta dishes throughout North Africa and the Mediterranean Basin.

However, a persistent disease known as Septoria tritici blotch (STB) has been threatening durum wheat harvests across the country thanks to its increasing resistance to fungicides and adaptability to harsher climatic conditions. The disease, which is caused by the fungus Zymoseptoria tritici, thrives under humid conditions and can cause up to 60% yield loss in farmers’ fields.

To help fight this disease, the International Maize and Wheat Improvement Center (CIMMYT) established the Septoria Precision Phenotyping Platform in collaboration with the Institution of Agricultural Research and Higher Education of Tunisia (IRESA) and the International Center for Agricultural Research in the Dry Areas (ICARDA) in Tunisia in 2015.

The platform aims to accelerate the transfer of STB resistance genes into elite durum wheat lines from national and international breeding programs, particularly CIMMYT and ICARDA breeding programs. Researchers at the platform have tested an impressive diversity of durum wheat lines for resistance to the disease from research institutes across Tunisia, Morocco, Algeria, Mexico, France, Italy, the UK, USA and Canada.

STB field reactions showing typical necrotic symptoms containing pycnidia on an infected adult plant leaf of wheat. (Photo: Septoria Precision Phenotyping Platform)

“New and more virulent strains of the pathogen are constantly emerging, which results in previously resistant wheat varieties becoming more susceptible,” said Sarrah Ben M’Barek, head of the laboratory at the Septoria Precision Phenotyping platform.

Field phenotyping – the use of field-testing to identify desired plant traits — is the heart of the platform. Scientists can test as many as 30,000 plots each year for STB resistance.

Evaluations are conducted at two main field research stations managed by the Regional Field Crop Center (CRRGC) and the National Institute of Field Crops (INGC), based at two major hotspots for the disease in Beja and Kodia. This work is complemented by laboratory research at the National Agronomic Institute of Tunisia (INAT) at Tunis.

“The platform plays a critical role in identifying STB resistant wheat germplasm and characterizing the resistance genes they possess. These resistant sources be can further utilized in hybridization schemes by durum wheat breeders worldwide to develop durable resistant varieties,” explained CIMMYT consultant and platform coordinator Amor Yahyaoui.

With the help of data from the platform, breeders hope to combine multiple resistance genes in an individual variety to create a genetically complex “lock” whose combination the fungus will not easily break.

According to Ben M’Barek, the huge genetic diversity in wheat and its ancestors has helped breeders to develop new varieties for almost a century. However, the adoption of new varieties has typically been slow.

Farmers in Tunisia traditionally rely on fungicides to manage the disease. However, with the pathogen recently becoming more resistant to fungicides and more adaptive to harsher climatic conditions, interest in STB resistant varieties is increasing.

Field disease reactions of a susceptible wheat cultivar. (Photo: Septoria Precision Phenotyping Platform)

A hub for training and collaboration

The platform is also a hub for training and capacity development for national and international scientists, field research and lab. assistants, students and farmers. It brings together research staff and technicians from different institutions within Tunisia including the CRRGC, INGC, the National Institute of Agricultural Research of Tunisia (INRAT), INAT and the University of Jendouba.

Farmer’s organizations and regional extension services, as well as private organizations such as Comptoir Multiservices Agricoles (CMA), seed and chemical companies also collaborate with the platform. The result is a team effort that has generated a tremendous wealth of data, made only possible through the dedication of Yahyaoui, said Ben M’Barek.

“Spending a few days at the platform each year is a like a crash course on STB resistance. All subjects are covered and great experts around the world come together to discuss all details of this host-pathogen interaction,” said Filippo Bassi, senior durum wheat breeder at ICARDA.

“Sending young scientists to spend some time at the platform ensures that they learn all about the mechanisms of resistance and take them back to their home country to deploy them in their own breeding programs. It is like a true university for STB.”

Yet, the platform still has a lot of work to do, according to Ben M’Barek. Scientists at the platform are now working on raising awareness on crop and pest management such as integrated management approaches amongst farming communities, setting up on-farm field trials and developing disease early warning surveillance.

Next year the platform will provide a unique podium for students, academics and researchers to exchange ideas and research findings on cereal leaf blight diseases. The International Symposium on Cereal Leaf Blights will take place on May 19-21, 2021 in Tunisia. Details can be found here.

The Septoria Precision Phenotyping Platform is led by the International Maize and Wheat Improvement Center (CIMMYT), in collaboration with the Institution of Agricultural Research and Higher Education of Tunisia (IRESA) and the International Center for Agricultural Research in the Dry Areas (ICARDA) and is supported by the CGIAR Research Program in Wheat (WHEAT).

Septoria Precision Phenotyping Platform at Oued Béja (CRRGC). (Photo: Gert Kema/Wageningen University)

Maize and other food crops on sale at Ijaye market, Oyo State, Nigeria. (Photo: Adebayo O./IITA)

New publications: Power, agency and benefits among women and men maize farmers

Written by Emma Orchardson on August 27, 2020. Posted in Publications.

For smallholder farmers in sub-Saharan Africa, new agricultural technologies such as improved maize varieties offer numerous benefits — increased incomes, lower workloads and better food security, among others. However, when new technologies are introduced, they can denaturalize and expose gender norms and power relations because their adoption inevitably requires women and men to renegotiate the rules of the game. The adoption of new varieties will often be accompanied by a number of related decisions on the allocation of farm labor, the purchase and use of inorganic fertilizers, switching crops between women- and men-managed plots, and the types of benefit household members expect to secure may change.

In an article published this month in Gender, Technology and Development, researchers from the International Maize and Wheat Improvement Center (CIMMYT) explore how women in Nigeria negotiate these new power dynamics to access and secure the benefits of improved maize varieties and, more broadly, to expand their decision-making space.

Using focus group and interview data collected as part of the GENNOVATE project, the authors draw on case studies from four villages — two in the northern states of Kaduna and Plateau; two in the southwestern state of Oyo — to develop an understanding of the relationship between gender norms, women’s ability and willingness to express their agency, and the uptake of agricultural technologies. “This is an important step toward improving the capacity of agricultural research for development to design and scale innovations,” say the authors. “Achieving this ambition is highly relevant to maize.”

The results were similar across all four sites. The authors found that women in each area were constrained by powerful gender norms which privilege male agency and largely frown upon women’s empowerment, thus limiting their ability to maximize the benefits from improved varieties or realize their agency in other domains.

All women respondents remarked that improved maize varieties were easy to adopt, have higher yields and mature quickly, which meant that income flows started earlier and helped them meet household expenditures on time. They prioritized the contribution of improved maize to securing household food security, which helped them meet their ascribed gender roles as food providers.

“At the same time though, women felt they could not maximize their benefits from improved maize varieties due to men’s dominance in decision-making,” the authors explain. “This was particularly the case for married women.”

“Men are meant to travel far – not women”

Woman selling white maize at Bodija market in Ibadan, Nigeria. (Photo: Adebayo O./IITA)

Embedded gender norms – particularly those relating to mobility – infuse the wider environment and mean that women’s access to opportunities is considerably more restricted than it is for men.

The findings demonstrate that both women and men farmers secure benefits from improved maize varieties. However, men accrue more benefits and benefit directly, as they have unfettered mobility and opportunity. They can access markets that are further away, and the maize they sell is unprocessed and requires no transformation. Additionally, men do not question their right to devote profits from maize primarily to their own concerns, nor their right to secure a high level of control over the money women make.

On the other hand, women respondents — regardless of age and income cohort — repeatedly stated that while it is hard to earn significant money from local sales of the processed maize products they make, it is also very difficult for them to enter large markets selling unprocessed, improved maize.

The difficulties women face in trying to grow maize businesses may be partly related to a lack of business acumen and experience, but a primary reason is limited personal mobility in all four communities. For example, in Sabon Birni village, Kaduna, women lamented that though the local market is not large enough to accommodate their maize processing and other agri-business ventures, they are not permitted travel to markets further afield where ‘there are always people ready to buy’.

“Women’s benefits relate to the fact that improved maize varieties increase the absolute size of the ‘maize cake’,” say the authors. “They expect to get a larger slice as a consequence. However, the absolute potential of improved varieties for boosting women’s incomes and other options of importance to women is hampered by gender norms that significantly restrict their agency.”

The implications for maize research and development are that an improved understanding of the complex relational nature of empowerment is essential when introducing new agricultural technologies.

Read the full paper:
Unequal partners: associations between power, agency and benefits among women and men maize farmers in Nigeria

Other recent publications from GENNOVATE:

Continuity and Change: Performing Gender in Rural Tanzania

Engaging men in gender-equitable practices in maize systems of sub-Saharan Africa

Cover photo: Maize and other food crops on sale at Ijaye market, Oyo State, Nigeria. (Photo: Adebayo O./IITA)

Read more recent publications by CIMMYT researchers:

Phenotypic characterization of Canadian barley advanced breeding lines for multiple disease resistance. 2019. Osman, M., Xinyao He, Capettini, F., Helm, J., Singh, P.K. In: Cereal Research Communications v. 47, no. 3, pg. 484-495.
Tillage and crop rotations enhance populations of earthworms, termites, dung beetles and centipedes: evidence from a long-term trial in Zambia. 2019. Muoni, T., Mhlanga, B., Forkman, J., Sitali, M., Thierfelder, C. In: Journal of Agricultural Science v. 157, no. 6, pg. 504-514.
Genética de la resistencia a roya amarilla causada por Puccinia striiiformis f. sp. tritici W. en tres genotipos de trigo (Triticum aestivum L.) = Genetics of the resistance to yellow rust caused by Puccinia striiformis f. sp. tritici W. in three genotypes of wheat (Tritcum aestivum L.). 2019. Rodriguez-Garcia, M.F., Rojas Martínez, R.I., Huerta-Espino, J., Villaseñor Mir, H.E., Zavaleta Mejía, E., Sandoval-Islas, S., Crossa, J. In: Revista Fitotecnia Mexicana v. 42, no. 1, pg. 31-38.
Mapping of maize storage losses due to insect pests in central Mexico. 2019. García-Lara, S., García-Jaimes, E., Bergvinson, D.J. In: Journal of Stored Products Research v. 84, art. 101529.
Analysis of distribution systems for supply of synthetic grain protectants to maize smallholder farmers in Zimbabwe: implications for hermetic grain storage bag distribution. 2019. Govereh, J., Muchetu, R.G., Mvumi, B.M., Chuma, T. In: Journal of Stored Products Research v. 84, art. 101520.
Agronomic performance and susceptibility of seven Ghanaian improved sweet potato varieties to the sweet potato weevil, Cylas spp. (Coleoptera: Brentidae) in Coastal Savanna zone of Ghana. 2019. Adom, M., Fening, K.O., Wilson, D.D., Adofo, K., Bruce, A.Y. In: African Entomology v. 27, no. 2, pg. 312-321.
Validation of candidate gene-based markers and identification of novel loci for thousand-grain weight in spring bread wheat. 2019. Sehgal, D., Mondal, S., Guzman, C., Garcia Barrios, G., Franco, C., Singh, R.P., Dreisigacker, S. In: Frontiers in Plant Science v. 19, art. 1189.
Genomic prediction and genome-wide association studies of flour yield and alveograph quality traits using advanced winter wheat breeding material. 2019. Kristensen, P.S., Jensen, J., Andersen, J.P., Guzman, C., Orabi, J., Jahoor, A. In: Genes v. 10, no. 9, art. 669.
Identification of superior doubled haploid maize (Zea mays) inbred lines derived from high oil content subtropical populations. 2019. Silva-Venancio, S., Preciado-Ortiz, R.E., Covarrubias-Prieto, J., Ortíz-Islas, S., Serna-Saldivar, S.O., García-Lara, S., Terron Ibarra, A., Palacios-Rojas, N. In: Maydica v. 64, no. 1, pg. 1-11.
Tillage and residue-management effects on productivity, profitability and soil properties in a rice-maize-mungbean system in the Eastern Gangetic Plains. 2019. Rashid, M.H., Timsina, J., Islam, N., Saiful Islam. In: Journal of Crop Improvement v. 33, no. 5, pg. 683-710.
Mapping of genetic loci conferring resistance to leaf rust from three globally resistant durum wheat sources. 2019. Kthiri, D., Loladze, A., N’Diaye, A., Nilsen, K., Walkowiak, S., Dreisigacker, S., Ammar, K., Pozniak, C.J. In: Frontiers in Plant Science v. 10, art. 1247.
Compost amended with N enhances maize productivity and soil properties in semi-arid agriculture. 2019. Shahid Iqbal, Arif, M., Khan, H.Z., Yasmeen, T., Thierfelder, C., Tang Li, Khan, S., Nadir, S., Jianchu Xu In: Agronomy Journal v. 111 no. 5, pg. 2536-2544.
Simulation-based maize–wheat cropping system optimization in the midhills of Nepal. 2019. Laborde, J.P., Wortmann, C.S., Blanco-Canqui, H., McDonald, A., Lindquist, J.L. In: Agronomy Journal v. 111, no. 5, pg. 2569-2581.
Affordability linked with subsidy: impact of fertilizers subsidy on household welfare in Pakistan. 2019. Ali, A., Rahut, D.B., Imtiaz, M. In: Sustainability v. 11, no. 19, art. 5161.
Field-specific nutrient management using Rice Crop Manager decision support tool in Odisha, India. 2019. Sharma, S., Rout, K.K., Khanda, C.M., Tripathi, R., Shahid, M., Nayak, A.D., Satpathy, S.D., Banik, N.C., Iftikar, W., Parida, N., Kumar, V., Mishra, A., Castillo, R.L., Velasco, T., Buresh, R.J. In: Field Crops Research v. 241, art. 107578.
Balanced nutrient requirements for maize in the Northern Nigerian Savanna: parameterization and validation of QUEFTS model. 2019. Shehu, B.M., Lawan, B.A., Jibrin, J. M., Kamara, A. Y., Mohammed, I.B., Rurinda, J., Shamie Zingore, Craufurd, P., Vanlauwe, B., Adam, A.M., Merckx, R. In: Field Crops Research v. 241, art. 107585.
Factor analysis to investigate genotype and genotype × environment interaction effects on pro- vitamin A content and yield in maize synthetics. 2019. Mengesha, W., Menkir, A., Meseka, S., Bossey, B., Afolabi, A., Burgueño, J., Crossa, J. In: Euphytica v. 215, no. 11, art. 180.
Agricultural productivity and soil carbon dynamics: a bioeconomic model. 2019. Berazneva, J., Conrad, J.M., Güereña, D. T., Lehmann, J., Woolf, D. In: American Journal of Agricultural Economics v. 101, no.4, pg. 1021-1046.
Effect of manures and fertilizers on soil physical properties, build-up of macro and micronutrients and uptake in soil under different cropping systems: a review. 2019. Dhaliwal, S.S., Naresh, R.K., Mandal, A., Walia, M.K., Gupta, R.K., Singh, R., Dhaliwal, M.K. In: Journal of Plant Nutrition v. 42, no. 2, pg. 2873-2900.
Combined study on genetic diversity of wheat genotypes using SNP marker and phenotypic reaction to Heterodera filipjevi. 2019. Majd Taheri, Z., Tanha Maafi, Z., Nazari, K., Zaynali Nezhad, K., Rakhshandehroo, F., Dababat, A.A. In: Genetic Resources and Crop Evolution v. 66, no. 8, pg. 1791-1811.
Characterization of QTLs for seedling resistance to tan spot and septoria nodorum blotch in the PBW343/Kenya Nyangumi wheat recombinant inbred lines population. 2019. Singh, P.K., Sukhwinder-Singh, Zhiying Deng, Xinyao He, Kehel, Z., Singh, R.P. In: International Journal of Molecular Sciences v. 20, no. 21, art. 5432.
Rapid identification and characterization of genetic loci for defective kernel in bread wheat. 2019. Chao Fu, Jiuyuan Du, Xiuling Tian, He Zhonghu, Luping Fu, Yue Wang, Dengan Xu, Xiaoting Xu, Xianchun Xia, Zhang Yan, Shuanghe Cao In: BMC Plant Biology v. 19, no. 1, art. 483.
Nitrogen fertilizer rate increases plant uptake and soil availability of essential nutrients in continuous maize production in Kenya and Zimbabwe. 2019. Pasley, H.R., Cairns, J.E., Camberato, J.J., Vyn, T.J. In: Nutrient Cycling in Agroecosystems v. 115, no. 3, pg. 373-389.
Identification of a conserved ph1b-mediated 5DS–5BS crossing over site in soft-kernel durum wheat (Triticum turgidum subsp. durum) lines. 2019. Ibba, M.I., Mingyi Zhang, Xiwen Cai, Morris, C.F. In: Euphytica v. 215, art. 200.
Optimum and decorrelated constrained multistage linear phenotypic selection indices theory. 2019. Ceron Rojas, J.J., Toledo, F.H., Crossa, J. In: Crop Science v. 59, no. 6, pg. 2585-2600.
Comparison of weighted and unweighted stage-wise analysis for genome-wide association studies and genomic selection. 2019. Tigist Mideksa Damesa, Hartung, J., Gowda, M., Beyene, Y., Das, B., Fentaye Kassa Semagn, Piepho, H.P. In: Crop Science v. 59, no. 6, pg. 2572-2584.
Effects of drought and low nitrogen stress on provitamin a carotenoid content of biofortified maize hybrids. 2019. Ortiz-Covarrubias, Y., Dhliwayo, T., Palacios-Rojas, N., Thokozile Ndhlela, Magorokosho, C., Aguilar Rincón, V.H., Cruz-Morales, A.S., Trachsel, S. In: Crop Science v. 59, no. 6, pg. 2521-2532.
Designing interventions in local value chains for improved health and nutrition: insights from Malawi. 2019. Donovan, J.A., Gelli, A. In: World Development Perspectives v. 16, art. 100149.

Gender Dynamics in Seed Systems in Sub-Saharan Africa and Worldwide Lessons workshop

Lessons for gender in seed systems

Written by Mary Donovan on August 20, 2020. Posted in Videos.

Seed systems are complex and dynamic, involving diverse, interdisciplinary actors. Women play an important role in the seed value chain, although underlying social and cultural norms can impact their equal participation. Gender-sensitive seed systems will create more opportunities for women and increase food security.

The International Maize and Wheat Improvement Center (CIMMYT) convened a multi-stakeholder technical workshop titled, “Gender dynamics in seed systems in sub-Saharan Africa and worldwide lessons” on December 2, 2019, in Nairobi, Kenya. Researchers and development practitioners operating in the nexus of gender and seed systems shared lessons learned and research findings to identify knowledge gaps and exchange ideas on promising — and implementable — interventions and approaches that expand opportunities for women in the seed sector.

Close up of a quality protein maize cob. (Photo: Alfonso Cortés/CIMMYT)

The missing link between maize seeds and trust

Written by Mary Donovan on August 18, 2020. Posted in Features.

The world population is expected to rise to almost 10 billion by 2050. To feed this number of people, we need to increase food production while using fewer resources. Biofortification, the process of fortifying staple crops with micronutrients, could help to solve this problem.

However, it is not that easy to identify biofortified seeds.

Often, the process of biofortification does not change a seed in a visible way, opening the possibilities for counterfeit products. Farmers cannot verify that the seeds they buy are as advertised. Unsurprisingly, fake seeds are a major obstacle to the adoption of biofortified crops. Similarly, in the process from farm to fork, traceability of biofortified food is equally difficult to achieve.

Picture Aisha, a smallholder farmer in Nigeria. She’s in the market for biofortified maize seeds for her farm. How does she know which seeds to pick, and how can she be sure that they are actually biofortified?

One solution is blockchain technology.

Quality protein maize looks and tastes just like any other maize, but has increased available protein that can stem or reverse protein malnutrition, particularly in children with poor diets. (Photo: Xochiquetzal Fonseca/CIMMYT)

Researchers consult smallholders to test demand for vitamin A-enriched maize in Kenya. (Photo: CIMMYT)

Natalia Palacios, CIMMYT maize nutrition quality specialist, works on breeding maize rich in beta-carotene, a provitamin that is converted to vitamin A within the human body. (Photo: CIMMYT)

What is blockchain?

Blockchain is a shared digital ledger for record keeping, where data is decentralized and allocated to users. Digital information, or blocks, is stored in a public database, or chain.

This technology platform helps in situations of lack of trust. It provides an unhackable, unchangeable and transparent record of events where users place trust in computer code and math, instead of a third party. This code writes the rules of the system and the software is peer-reviewed, so rules and data are resilient against corruption. When new data is added to the database, actors in then network verify and timestamp the data before adding it to the blockchain. After input, no one can change the information. No single entity owns or controls the database, allowing actors to trust in the system without having to trust any other actors.

While often associated with bitcoin and cryptocurrencies, blockchain technology has many other uses in traditional industries, including the potential to transform agri-food systems. The Community of Practice on Socio-economic Data, led by the International Maize and Wheat Improvement Center (CIMMYT), produced a report detailing the role blockchain can play in agri-food systems and biofortified seeds.

Blockchain for agri-food systems

Agri-food systems consist of complex networks that often mistrust each other. Blockchain technology can enhance transparency, traceability and trust. It could have a significant role to play in closing the yield gap and reducing hunger.

Many transactions done in the agri-food sector have paper records. Even when records are digital, disconnected IT systems create data silos. Blockchain enables stakeholders to control, manage and share their own data, breaking down silos.

For example, blockchain technology can help solve issues of land governance, unclear ownership and tenure by providing an accurate land registration database. It can help with compliance to standards from governments or private organizations. This technology could make financial transactions more efficient, limit corruption, and provide provenance, traceability and recall of products.

Verifying biofortified maize seeds

HarvestPlus conducted a study to understand the barriers to widespread adoption of biofortified seeds. The team interviewed 100 businesses and 250 individuals from farmers to global brands about their experiences with biofortification. Unsurprisingly, they found that a big barrier to adoption is the inability to distinguish biofortified crops from standard ones.

Therefore, it is crucial to have a system to verify biofortified seeds. HarvestPlus collaborated with The Fork to investigate solutions.

One solution is a public blockchain. The result could look like this: Aisha, our smallholder farmer in Nigeria wants to buy biofortified maize seeds for her farm. At the store, she takes a phone out of her pocket and scans a QR code on a bag to see a trustworthy account of the seeds’ journey to that bag. Satisfied with the account, she brings verified biofortified maize seeds home, improving nutrition of her family and community.

Contingent on farmers having access to smartphones, this situation could be possible. However, blockchain technology will not solve everything, and it is important we test and study these solutions while considering other challenges, such as access to technology and human behavior.

The Community of Practice on Socio-economic Data report, Blockchain for Food, gives principles of digital development of blockchain. It is crucial to understand the existing ecosystem, design for scale, build for sustainability and design the technology with the user. These are crucial points to consider when developing blockchain solutions for agri-food systems.

As the global food system is beginning to transition towards more transparency, circularity and customization, blockchain technology could play a major role in how this shift evolves. A new testing and learning platform for digital trust and transparency technologies in agri-food systems, including blockchain technology, was launched in February 2020. The platform will build capacity of the potential of this technology and ensure that it is usable and inclusive.

Read the report:
Blockchain for Food: Making Sense of Technology and the Impact on Biofortified Seeds.

Cover photo: Close up of a quality protein maize cob. (Photo: Alfonso Cortés/CIMMYT)

Nancy Wawira (29) stands among ripening maize cobs of high yielding, drought-tolerant maize varieties on a demonstration farm in Embu County, Kenya. Involving young people like Wawira helps to accelerate the adoption of improved stress-tolerant maize varieties. (Photo: Joshua Masinde/CIMMYT)

The future of agriculture in sub-Saharan Africa

Written by Shiela Chikulo on August 17, 2020. Posted in Features.

The theme for International Youth Day 2020, Youth Engagement for Global Action, highlights the various ways in which the engagement of young people at local, national and global levels enriches national and multilateral institutions and processes.

Up to 60% of Africa’s youth face challenges such as limited employment opportunities, financial constraints to access land and adequate technical equipment. However, agriculture is increasingly providing options. Through it, young people are participating and leveraging on new technologies that can optimize farming systems and create employment.

This photo essay depicts youth in on-farm and off-farm activities across East and Southern Africa. These young men and women are innovators and adopters of improved technologies such as small scale mechanization, appropriate farming practices, employment opportunities and research innovations implemented by the International Maize and Wheat Improvement Center (CIMMYT).

In Embu County, Kenya, 25-year-old Jackline Wanja stands in a demonstration plot of high-yielding, drought-resilient and fast-maturing maize varieties. (Photo: Joshua Masinde/CIMMYT)

Beyene Chufamo (28) is a two-wheel tractor technology service provider based in Meki, Ethiopia. In 2016, with the support of CIMMYT, he started providing repair and maintenance services to service providers in different areas. (Photo: Ephrem Tadesse/CIMMYT)

Beyene Chufamo (center, in green t-shirt) provides technical training on operation, safety, repair and maintenance to machinery hire service providers in different CIMMYT operation sites. His participation in small mechanization supply chain enables service providers and farmers to effectively use their machinery and significantly reduce the downtime of their machinery. (Photo: Ephrem Tadesse/CIMMYT)

Nancy Wawira (29) stands among ripening maize cobs of high yielding, drought-tolerant maize varieties on a demonstration farm in Embu County, Kenya. Involving young people like Wawira helps to accelerate the adoption of improved stress-tolerant maize varieties. (Photo: Joshua Masinde/CIMMYT)

Rose Salimanja (34) from Nyanga District, Zimbabwe, operates a two-wheel tractor and trailer during a trailer operations training course. Under the Zimbabwe Building Resilience Fund (ZRBF), CIMMYT is implementing appropriate small-scale mechanized solutions and services for smallholder farmers and service providers. (Photo: Dorcas Matangi/CIMMYT)

Targeting youth in interventions such as the Farm Mechanization and Conservation Agriculture for Sustainable Intensification (FACASI) project provides pathways for training in appropriate mechanized solutions to support farmers in rural areas. The enterprising Mwanga Youth Group members Pinnot Karwizi (28), Shepherd Karwizi (26) and Masimba Mawire (32) provide grain shelling services to farmers in Makonde District, Zimbabwe. (Photo: Shiela Chikulo/CIMMYT)

Zvikomborero Karimudengu skillfully operates a two-wheel tractor and trailer during a training session in Nyanga South district, Zimbabwe. Small scale mechanization services are proving to be immensely useful during the COVID-19 pandemic as services can be provided while adhering to social distancing regulations and without requiring additional labour. (Photo: Dorcas Matangi/CIMMYT)

Alison Bentley (right) and Martin Jones inspect wheat in a glasshouse. (Photo: Toby Smith/Gloknos)

Alison Bentley to be new Global Wheat Program director

Written by Marta Millere on August 7, 2020. Posted in News.

In November 2020, Alison Bentley will be joining the International Maize and Wheat Improvement Center (CIMMYT) as the new program director of the Global Wheat Program. She will be succeeding Hans Braun, who has steered the program for the last 16 years.

Bentley is thrilled to join CIMMYT and excited about the opportunity to harness science and breeding to improve livelihoods. She believes in a collective vision for equitable food supply and in science-led solutions to deliver impact.

“It really is an exciting time for wheat research: the international community has worked together to produce sequence and genomic resources, new biological and physiological insights, a wealth of germplasm and tools for accelerating breeding. This provides an unparalleled foundation for accelerating genetic gains and connecting ideas to determine how we can practically apply these tools and technologies with partners to deliver value-added outputs,” she said.

Bentley has worked on wheat — wheat genetics, wheat genetic resources and wheat pre-breeding — her entire career. She is the UK’s representative on the International Wheat Initiative Scientific Committee, and is a committee member for the Genetics Society, the UK Plant Sciences Federation, the Society of Experimental Botany, and the Editorial Board of Heredity.

Bentley obtained her PhD from the University of Sydney, Australia, in 2007. She then joined the National Institute of Agricultural Botany (NIAB) in the UK, where she progressed from Senior Research Scientist (2007) to Program Leader for Trait Genetics (2013), and Director of Genetics and Breeding (since 2016).

Currently, Bentley is involved in international research projects in Ethiopia, The Gambia, Ghana, India and Pakistan. She leads a number of UK-India projects with partners including Punjab Agricultural University, the Indian National Institute of Plant Genome Research and the University of Cambridge, studying variation and developing wheat and other cereal germplasm with enhanced resource use efficiency.

AGG project to ramp up genetic gains in maize for better livelihoods

Written by Mary Donovan on July 31, 2020. Posted in In the media.

A new project, Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG), seeks to achieve these results by speeding up genetic gains in maize and wheat breeding to deliver improved, stress resilient, nutritious seed to smallholders in 13 countries in sub-Saharan Africa (SSA) and four in South Asia. The 5-year AGG project is funded by the Bill & Melinda Gates Foundation, the UK Department for International Development (DFID) and the U.S. Agency for International Development (USAID).

The maize component of the project brings together diverse partners, including the International Maize and Wheat Improvement Center (CIMMYT) and the International Institute of Tropical Agriculture (IITA) as co-implementers; national agricultural research systems (NARS); and small and medium-sized (SME) seed companies.

New project to ramp up genetic gains in maize for better livelihoods

Written by Mary Donovan on July 30, 2020. Posted in In the media.

Norah Kayugi holds a bunch of Striga weeds she has uprooted on a farm she works as a casual laborer in Siaya. (Photo: Joshua Masinde/CIMMYT)

Work to develop high yielding Striga tolerant maize seed is bearing fruit

Written by Alison Doody on July 30, 2020. Posted in Features.

Striga, an invasive parasitic weed with purple-colored flowers, looks striking and harmless. But, beyond that mark of beauty, is a nutrient-sucking monster that stunts crops such as maize and sorghum, leaving affected farmers counting losses.

Witchweed thrives in poor soils with low rainfall conditions. It is prevalent in farming systems with poor crop management practices and in communities where farmers use minimal or no fertilizer. Once maize begins germinating in Striga-prevalent soil, it stimulates Striga seeds to germinate. Striga then attaches to the roots of the host plant, sapping nutrients from the plant, leading to stunting. The potential yield loss can reach up to 100%. Some farmers attempt to uproot it once they notice it germinating alongside their maize plantation, but this is often too late because damage is done as soon as the parasite attaches to the maize roots. When mature, the weed deposits tens of thousands of tiny seeds into the soil. This makes it very difficult for farmers to get rid of it.

To tackle this challenge, farmers need to apply inorganic fertilizer, which is not always affordable, or animal manure to enrich the soil before planting. They are also advised by researchers and extensionists to practice crop rotation or intercropping with legumes such as beans, soybean or groundnuts that restrict Striga’s germination. In the Assessment of Management Options on Striga Infestation and Maize Grain Yield in Kenya, for example, researchers recommend that Striga control measures include a combination of herbicide-resistant or maize varieties with native genetic resistance intercropped with legumes.

Nevertheless, while a few control measures have been moderately successful, the problem still persists, especially in western Kenya, eastern Uganda and lake zone of Tanzania, where farmers have frequently voiced their frustrations at the ubiquity of this invasive weed.

“While crop rotation with crops such as soybean or beans may break the cycle of Striga, its seed can stay in the soil and remain viable for up to 10 years,” says Dan Makumbi, a maize breeder with the International Maize and Wheat Improvement Center (CIMMYT), who is leading research efforts against the witchweed.

A sorghum field infested with Striga in Siaya County. (Photo: Joshua Masinde/CIMMYT)

Norah Kayugi on a Striga-infested farm in Siaya County. (Photo: Joshua Masinde/CIMMYT)

Norah Kayugi holds a bunch of Striga weeds she has uprooted on a farm she works as a casual laborer in Siaya. (Photo: Joshua Masinde/CIMMYT)

A blow to optimal yield potential

Maize is a staple crop that is predominantly cultivated by smallholder farmers in western Kenya and the lake region. It is an important source of food security and livelihoods of millions of people in the region, but constraints such as Striga prevent farmers from obtaining the crop’s ideal potential.

“The yield loss would have been adequate to cover my family’s food requirements for a year,” Naliaka said. “From two farming seasons, I could harvest a sufficient quantity of maize and sell some surplus to pay my children’s school fees. With the Striga menace, all that is but a dream.”

Just like Naliaka, Norah Kayugi, a 40-year-old widowed mother of six children from Siaya County in Kenya, has seen her maize production fall to less than 8 bags of 90kgs per acre. In normal circumstances, they would obtain at least 16 bags of maize per acre. The significant yield loss sets back many affected households in a big way, as they experience food shortage only a few months after harvest. Some divert their reduced incomes for food purchases, possibly leaving other priorities such as health and education of their children unattended.

Kayugi, who has been a farmer since 1997, now takes on casual jobs to supplement her farming in order to support her family, being the sole breadwinner following her husband’s demise years ago. “I plant vegetables, beans and maize to sustain my family. My one-acre farm yields about 10 bags of 90ks each. But I know for sure that were it not for this weed, the yield potential could reach 30 bags of 90kgs each per acre.”

A young, yet-to-flower Striga weed at the CIMMYT-KALRO Kibos Research Station in Kisumu. (Photo: Joshua Masinde/CIMMYT)

Standing up to multiple farming stresses

These smallholders, like their counterparts elsewhere in sub-Saharan Africa, already face other farming challenges, including climate change-induced droughts, pests such as the fall armyworm, diseases like maize lethal necrosis (MLN), and declining soil fertility, among others. While CIMMYT has registered breakthroughs in developing maize varieties that tolerate such stresses, on-going efforts against Striga are also taking shape, challenges notwithstanding.

The development and deployment of the imazapyr-resistant (IR) maize has been one such instance of effective Striga control. With this method, herbicide-resistant maize seeds are coated with herbicide. The seed germinates and absorbs some of the herbicide used to coat it. The germinating maize stimulates Striga to germinate and as it attaches to the maize root, it is killed before it can cause any damage. Despite its effectiveness, sustaining this technology presented a major challenge to seed companies.

“It was costly for seed companies, as they needed to establish and sustain the operation of separate seed treatment units dedicated to production of the herbicide-coated maize seed. Once you establish a line to dress the seed with the chemical, you cannot use it to treat any other seeds as the chemical will destroy them,” said Makumbi.

Seed companies — like NASECO in Uganda, Kenya Seed Company in Kenya, Western Seed Company and FreshCo in Kenya, and Meru Agro in Tanzania — obtained financial and technical support from a partnership initiative coordinated by African Agricultural Technology Foundation (AATF) and backed by CIMMYT to scale commercialisation of StrigAway^TM maize in East Africa. The initiative was funded by USAID’s Feed the Future Partnering for Innovation program through Fintrac and it supported the seed companies to establish seed treatment facilities to handle herbicide resistant maize. This allowed each of the companies to have a fully dedicated facility for herbicide resistant maize seed processing. “Right now, herbicide resistant maize hybrid seed is available on the market in Kenya, Tanzania and Uganda,” Makumbi said.

CIMMYT field technician Carolyne Adhiambo at a maize field experiment showing promise of Striga tolerance or resistance the Kibos Research station in Kisumu. (Photo: Joshua Masinde/CIMMYT)

Native hope

In the past few years, Makumbi and his team, in collaboration with the International Institute for Tropical Agriculture (IITA) and the Kenya Agricultural and Livestock Research Organization (KALRO), have redirected their efforts towards breeding for native genetic resistance to Striga. This means developing seeds which are naturally resistant to Striga, reducing the need for herbicides. The early indication is that there are several parental lines showing potential to tolerate or resist Striga, and these are being used to develop hybrids. The hybrids, which offer multiple benefits for farmers, are under wide scale testing in Kenya.

“In our tests, we are not only looking at Striga resistance alone but also other important traits such as good yield under optimal conditions, drought stress and low soil fertility, resistance to major foliar diseases including gray leaf spot, Turcicum leaf blight, maize streak virus and ear rots,” Makumbi noted.

As these breeding efforts continue, there is light at the end of the tunnel. The hope of farmers taking back full control of their maize farms from Striga’s “bewitching ways” in the near future remains alive.

Breaking Ground: Sudha Nair helps bridge gap between maize breeding and genetics

Written by Natasha Nagarajan on July 29, 2020. Posted in Features.

Sudha Nair is inspired every day by her passion for biology and genetics. The senior scientist at the International Maize and Wheat Improvement Center (CIMMYT) based in Hyderabad, India, works to define and practice the best strategies for applying genomics in agriculture.

“I always knew that science is what I would love to pursue,” said Sudha, an alumnus of both the Indian Agricultural Research Institute (IARI) in New Delhi and the National Institute of Agrobiological Sciences in Japan.

Originally from Kerala, India, Sudha did not expect a career in agriculture. “I studied for engineering after my high school as I was selected for that course before I was selected for the biology stream. It didn’t take me even a single moment to decide to leave the course six months later when I was selected for the undergraduate program in agriculture,” Sudha said. “I can’t say that it is love for agriculture that forced me to choose the field I am in, but it is the fascination for biological science. I love genetics and I love research; as long as I get to do this as part of my job, I am happy.”

Sudha’s first experience working with CIMMYT involved her PhD dissertation at IARI, which was a part of research conducted for the Asian Maize Biotechnology Network (AMBIONET), led by CIMMYT. “I had always looked at CIMMYT as an organization doing high quality applied science,” she said.

Starting in 2010 as a consultant for the Drought Tolerant Maize for Africa (DTMA) project, Sudha then interviewed for the position of maize fine-mapping specialist in 2011 and was selected as a scientist. Her career at CIMMYT has now spanned close to a decade.

Her role involves implementation of molecular breeding in the maize breeding program in Asia. This includes discovery, validation and application of molecular markers for prioritized traits, genomic selection, and marker-based quality assurance and quality control in maize breeding – through current and past projects like Heat Tolerant Maize for Asia (HTMA), Climate Resilient Maize for Asia (CRMA) and the CGIAR Research Program on Maize (MAIZE). Apart from this, she is currently involved in the Accelerating Genetic Gains in Maize and Wheat (AGG) project for incorporating elite and stress tolerance genetics from Asia in the elite African maize germplasm.

Sudha has been a part of a number of global maize projects including the Stress Tolerant Maize for Africa (STMA) project, which developed improved maize varieties tolerant to stresses such as drought and diseases, and HarvestPlus in maize, developing nutritionally enriched maize cultivars. She has also played a key role in developing CIMMYT’s second-generation tropicalized haploid inducers using marker-assisted breeding.

Sudha Nair speaking at a Heat Tolerant Maize for Asia (HTMA) annual review and planning meeting. (Photo: Sudha Nair/CIMMYT)

Bringing genetics and breeding together

Sudha is grateful for the role of CIMMYT in increasing acceptance and use of genomics in breeding programs. “When I started off as a graduate student, any work related to molecular genetics was called biotechnology, and we were considered as a different “breed”, who worked in silos to spend resources on “upstream research”, and whose results never saw any breeding applications. Breeding and molecular genetics were like parallel lines that would never meet,” she explained.

“In course of time, the research communities in applied breeding institutes like CIMMYT have brought about changes in strategies, goals, and more importantly, attitudes, and now all of us work towards one major goal of developing impactful products (varieties) for benefiting resource-constrained farming communities worldwide. All in all, I and my colleagues in the upstream research team in CIMMYT Global Maize Program have an important responsibility of providing core support to the breeding and seed systems teams in developing and delivering impactful products.”

When asked what the most enjoyable part of her work is, Sudha cited the practicality and applicability of her work. “Basically, my job responsibility is to design and implement the best strategies for applying genomics in maize breeding to achieve higher genetic gains,” she explained. “Being in an organization like CIMMYT, what is most satisfying about the role I am in is the translation of upstream research into tools for improving breeding efficiency and in turn into impactful maize varieties that the farming communities around the world cultivate.”

New project to ramp up genetic gains in maize for better livelihoods

Written by Mary Donovan on July 28, 2020. Posted in In the media.

New project to ramp up genetic gains in maize for better livelihoods

Written by Alison Doody on July 28, 2020. Posted in News.

Drought tolerant maize route out of poverty for community-based seed producer, Kenya. (Photo: Anne Wangalachi/CIMMYT)

As plant pests and diseases continue to evolve, with stresses like drought and heat intensifying, a major priority for breeders and partners is developing better stress tolerant and higher yielding varieties faster and more cost effectively.

A new project, Accelerating Genetic Gains in Maize and Wheat for Improved Livelihoods (AGG), seeks to achieve these results by speeding up genetic gains in maize and wheat breeding to deliver improved, stress resilient, nutritious seed to smallholders in 13 countries in sub-Saharan Africa (SSA) and four in South Asia. The 5-year AGG project is funded by the Bill & Melinda Gates Foundation, the UK Department for International Development (DFID), the U.S. Agency for International Development (USAID), and the Foundation for Food and Agriculture Research (FFAR).

Ambitious targets

At the inception meeting of the maize component of AGG on July 10, 2020, project leaders, partners and funders lauded the ambitious targets that aim to bolster the resilience and better the livelihoods, food and nutritional security of millions of smallholder farmers in SSA. At least 150,000 metric tons of certified seed is expected to be produced, adopted by 10 million households, planted on 6 million hectares by 2024 and benefiting 64 million people.

“We are developing climate resilient, nutritious, efficient, productive maize varieties for the farming community in sub-Saharan Africa. We will continue to work closely with our partners to develop product profiles, which are centered on the varieties that are really needed,” said CIMMYT Interim Deputy Director for Research Kevin Pixley.

AGG draws a solid foundation from previous projects such as Drought Tolerant Maize for Africa (DTMA), Improved Maize for Africa Soils (IMAS), Water Efficient Maize for Africa (WEMA) and Stress Tolerant Maize for Africa (STMA). Several high-yielding maize varieties that tolerate and/or resist diseases such as maize lethal necrosis (MLN), gray leaf spot (GLS), northern corn leaf blight, maize streak virus (MSV), turcicum leaf blight (TLB) and are drought-tolerant (DT), were developed and released to farmers across SSA. Varieties with nutritional traits such as nitrogen use efficiency (NUE) and quality protein maize (QPM) were also developed in the preceding initiatives.

Drought Tolerant Maize for Africa (DTMA) project monitoring and evaluation takes place in Tanzania. (Photo: Florence Sipalla/CIMMYT)

A matter of “life or death”

“When farmers are confronted by aggressive farming challenges, they want products that address those challenges at the earliest opportunity. Waiting for years could mean the difference between life and death,” remarked David Chikoye, the director of Southern Africa Hub at IITA.

A key focus of AGG is to incorporate gender-intentionality – special attention to the needs of women farmers and consumers – from the traits bred into new varieties, through the communication and technology deployment strategies.

“AGG provides an excellent opportunity to reorient our maize breeding, seed scaling and delivery strategies for greater impact on the livelihoods of smallholder farmers, especially women and the disadvantaged communities that are not well reached so far,” said B.M. Prasanna, director of CIMMYT’s Global Maize Program and the CGIAR Research Program on Maize. “Our vision is to accelerate genetic gains to 1.5-2 percent annually across different breeding pipelines in the 13 participating countries in SSA and to reach over 10 million households with improved varieties.”

AGG will strengthen the capacity of partners to achieve and sustain accelerated variety replacement — or turnover — and increase genetic gains in farmers’ fields.

Old vs new

Many improved varieties have been released in the past decade. However, the turnover of old and obsolete varieties with new and improved ones is not happening as quickly as anticipated.

“We are producing good products and getting them out, but not at the speed that farmers need. How do we make it possible and profitable for seed companies to quickly introduce new hybrids?” posed Gary Atlin, program officer at the Bill & Melinda Gates Foundation. “We need to move towards a breeding and seed system where we know that we can develop a new product in 4 or 5 years and then get it to the farmers much more quickly. This is a complex problem.”

To enhance AGG’s ability to identify new products that perform well for farmers under their challenging circumstances, on-farm testing will be scaled up significantly.

Guest of honor, Ethiopia’s Minister of State for Agriculture Mandefro Nigussie, lauded CIMMYT’s support in improving the resilience and productivity of maize and wheat in the country. He observed that this has helped improve maize productivity in Ethiopia from around 2 tons/ha to about 4 tons/ha over the past two decades.

“We consider such a huge accomplishment as a combination of efforts in germplasm development and breeding efforts of CIMMYT and the Ethiopian national programs. That partnership will flourish further in this new project,” he said.

A high throughput crop phenotyping platform, the ‘Leasyscan’ located at ICRISAT’s HQ Patancheru, India. Photo: A. Whitbread (ICRISAT)

Multi-disciplinary approaches to crop improvement for faster climate change adaptation

Written by Alison Doody on July 24, 2020. Posted in News.

This article by Sakshi Saini was originally published on the CCAFS website.

Ever-increasing emissions of greenhouse gases (GHG) is a global concern due to the association of high atmospheric GHG concentrations with global warming and climate change. A large and growing body of evidence predicts that this would further have a multifaceted impact on the human population, especially the poor and vulnerable groups, further exacerbating their vulnerabilities.

But what about crops? Plants use carbon dioxide (CO₂)—one of the most abundant GHGs, for photosynthesis. So shouldn’t an increase in atmospheric carbon dioxide aid crops to flourish? A counter-argument to this would be that at the same time there would be changes in other factors such as a change in precipitation rate, frequency and intensity of rains, among others, which might negatively impact crop production. So, how exactly would climatic variations impact the yield and productivity of crops? These are some of the questions that have been a global concern. Many studies have researched this, employing varied approaches such as systems biology, physiology and crop modelling. However, unprecedented changes in climatic conditions still pose uncertainties on the impacts on crops.

Recent research by an interdisciplinary team of scientists from the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), the CGIAR Research Program on Climate Chanage, Agriculture and Food Security (CCAFS)-Africa and CCAFS-Asia aspires to answer some of these questions. As part of this research, they have compiled recent progress made in the physiological and molecular attributes in plants, with special emphasis on legumes under elevated CO₂ conditions in a climate change scenario. The study proposes a strategic research framework for crop improvement that integrates genomics, systems biology, physiology and crop modelling approaches to cope with the changing climate. Some of the prime results of the study are as follows:

1. Major physiological and biochemical alterations in legumes triggered by elevated CO2

A range of physiological and biochemical alterations take place in plants exposed to elevated CO₂. In the case of legumes, elevated atmospheric CO₂concentrations also affect the nutritional quality and nodulation, causes changes in rhizosphere and Biological Nitrogen Fixation (BNF), among others. Studies have shown that elevated CO₂ would stimulate plant growth under nitrogen-sufficient conditions, but under nitrogen-limited conditions, it may have the detrimental effect of reducing plant growth by altering its primary metabolism. The anatomical differences between C3 and C4 plants (plants with C3 and C4 photosynthetic pathways) and their different ways of sequestering carbon (removing carbon dioxide from the atmosphere), have been an area of interest for climate scientists. Elevated CO₂combined with limited nitrogen may also promote biological ageing (senescence) rates as observed in flag leaves of rice and wheat. Studies also show that a higher level of carbon dioxide increases senescence rate in legumes.

2. Impact of elevated carbon-dioxide interaction with other abiotic stresses

As mentioned earlier, CO₂ is not the only factor that is impacting plant growth, it is dependent on other environmental factors such as water deficit stress and temperature, among others. Thus, these factors also need to be considered in combination with the atmospheric concentration. Studies have reported that elevated CO₂ induced a decrease (of 10%) in evaporation rates in both C3 and C4 plants. This caused an increase in canopy temperature (0.7 °C) coupled with a 19% yield increase in C3 crops. There is evidence that an increase in CO₂ has also phased down the effect of oxidative stress. Though, there is limited literature available about the impact of elevated carbon dioxide keeping into consideration the drought and heat responses of various crops.

3. Elevated carbon dioxide and its interaction with biotic stress-altered pathogen aggravation and virulence

The changing climate has affected pest-crop dynamics with more frequent outbreaks and changed the geographical distribution of pests, posing an economic threat to crops. Sometimes, other abiotic stresses like drought could increase fungal virulence as reported in drought-tolerant peanut and Aspergillus interaction. However, a combined interaction is not always additive as both unique and common responses have been observed. Increased CO₂causes greater photosynthate availability, but reduced foliage quality along with an increased concentration of plant defensive compounds after a pest infestation. This, in turn, affects insect feeding and increases disease incidence and predator parasitism interactions.

4. Molecular interventions for crop improvement under elevated carbon-dioxide

While elevated CO₂ may cause greater photosynthate availability, the interaction of elevated CO₂ with mentioned biotic and abiotic stresses calls for the development of climate change ready crop varieties. Thus, genomics assisted breeding along with other modern approaches can be very powerful tools to develop superior varieties, to de-risk the existing food system. This transformative approach towards the production of plants and crops would be instrumental in sustainably ensuring food security.

An integrated research framework for the future

The discussion and evidence presented illustrate that the effect of elevated CO₂ under a changing climate scenario is multifaceted and aggravated by the overlapping interaction of stressors. The notion that CO₂ has beneficial effects in terms of increased productivity is now being questioned since the photosynthetic fertilization effect is short term and often not time-tested for major crop species. The IPCC 2018 special report highlights several policy-level approaches that are aimed at limiting greenhouse gas emission. The scientific community needs to be prepared with suitable research outcomes to cope with the effects of elevated atmospheric CO2 levels. In this regard, an integrated framework combining different biological disciplines has been proposed by the team (Fig. 1).

Figure 1: A representation of a multifaceted strategy that could be employed to harness cutting edge technologies and greater precision to cope with elevated CO2, and generally with a changing climate.

While significant advances have been made in crop genomics, systems biology and genomics-assisted breeding, the success of trait dissection and trait deployment is very much dependent on the quality and precision of phenotyping. Recent advances in plant phenotyping using high throughput phenotyping tools have revolutionized the uptake of phenotype and allelic information in a more precise and robust way and complemented high throughput genomic resources

In the opinion of the authors of the publication, an integrated research framework that includes genomics/ systems biology and phenomics together with crop modelling would result in faster data-driven advances for understanding the optimal GxExM (genotype x environment x management) scenarios for current and projected climates. Interdisciplinary approaches as has been done through the Climate-Smart Village approach, are key to graduating from a descriptive level to an improved quantitative and process-level understanding of sustainable crop productivity.

Read more:

Journal article: An integrated research framework combining genomics, systems biology, physiology, modelling and breeding for legume improvement in response to elevated CO2 under climate change scenario