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Moving zinc-enriched wheat into the mainstream

Agricultural scientists are calling on support to add zinc-biofortification as a core trait in the world's largest wheat breeding program. Photo: CIMMYT/ Peter Lowe
Agricultural scientists are calling for support to make zinc-biofortification a core trait in the world’s largest wheat breeding program. Photo: CIMMYT/ Peter Lowe

EL BATAN, Mexico (CIMMYT) – In an effort to stamp out hidden hunger, scientists are calling for support to make zinc-biofortification a core trait in the world’s largest wheat breeding program.

At least 2 billion people around the world suffer from micronutrient deficiency, or hidden hunger, which is characterized by iron-deficiency anemia, vitamin A and zinc deficiency.

Zinc deficiency remains a crucial health issue in sub-Saharan Africa and South Asia. As a key nutrient in red meat, it is prevalent in areas of high cereal and low animal food consumption.

It is vital in times of rapid human growth such as pregnancy, infancy and puberty. Compared to adults, children, adolescents as well as pregnant and lactating women have an increased need for zinc. Deficiency harms growth and development and can cause respiratory infections, diarrheal disease and a general weakening of the immune system.

One way to tackle hidden hunger is through biofortified crops, which have been bred to contain higher amounts of minerals and vitamins. These crops help to improve health in poor communities where other nutritional options are unavailable, limited or unaffordable.

As a key staple, wheat provides 20 percent of the world’s dietary energy and protein, therefore it’s an ideal vehicle for biofortification, said Velu Govindan, a wheat breeder at the International Maize and Wheat Improvement Center (CIMMYT).

CIMMYT scientists are calling for funds to make increased zinc grain content a core trait in its global wheat breeding program. CIMMYT-derived wheat cultivars have contributed to more than half of the wheat varieties grown in developing countries.

“In wheat breeding, including zinc as core trait – as done with high and stable yield, drought and heat tolerance and disease resistance – would have huge health benefits in South Asia and sub-Saharan Africa,” said Ravi Singh, who leads CIMMYT’s wheat improvement program. “Around 70 percent of the wheat varieties grown in these regions derive from CIMMYT breeding research.”

In the early 2000s, scientists conducted large-scale screening for high zinc content in traditional wheat and their wild relatives from CIMMYT’s wheat germplasm bank. The search was successful, revealing diverse genetic resources with traits that became the building blocks for zinc-enriched wheat.

CIMMYT initiated biofortification breeding in 2006 and four biofortified wheat varieties have been released in South Asia. Promotion of zinc-biofortified wheat varieties in India and Pakistan is in the early stages and further testing and scaling out to other countries like Bangladesh, Nepal, Afghanistan and Ethiopia is underway, the scientists confirmed.

Studies in India have shown that regular consumption of zinc-enriched wheat improves the overall health of women and children, said Govindan.

Extensive global presence of CIMMYT-derived varieties means that, once the program adds enhanced grain zinc levels as a core trait, many wheat farmers and consumers throughout the developing world will automatically reap the benefits of better nutrition.

However, increased funding is needed to make the jump to full inclusion of high zinc content, according to Hans Braun, director of CIMMYT’s Global Wheat Program and CGIAR’s research program on wheat.

“Each added trait in a breeding program requires a significant increase in the number of breeding lines grown and evaluated, adding significant costs” Braun said.

CIMMYT’s wheat breeding program is currently funded at around $15 million per annum. In 2016, it distributed 14.5 tons of seed of experimental wheat lines in more than 500,000 small envelopes to nearly 300 partners in 83 countries. Globally, this makes CIMMYT the most important wheat germplasm provider together with the International Center for Agricultural Research in the Dry Areas (ICARDA).

For more information on zinc-biofortified wheat visit this science brief.

Q+A: Women in Triticum award provides development opportunities and support networks for women in agriculture

IMG_3076 (1)CIUDAD OBREGÓN, Mexico (CIMMYT) — Margaret Krause, a doctoral candidate in plant breeding at Cornell University, became interested in science and nature at an early age. She recalls growing and crossing flowers as a teenager, transferring the pollen from one plant to another as she had learned in biology class.

“I had little exposure to agriculture or how food is produced,” explained Krause. “When I began my undergraduate studies at the University of Minnesota in 2009, I was unsure how these interests would eventually translate into a career.”

Fast-forward to 2017, and Krause is serving as the U.S. Borlaug Fellow in Global Security at the International Maize and Wheat Improvement Center (CIMMYT) in the bread wheat breeding program and is one of five recipients of the 2017 Jeanie Borlaug Laube Women in Triticum (WIT) Early Career Award.

“The goal of the award is to provide professional development opportunities and a support network for these women in the future,” said Maricelis Acevedo of the Delivering Genetic Gains in Wheat Project at Cornell University, while presenting the WIT winners during CIMMYT’s Global Wheat Program Visitors’ Week in March.

In addition to Krause, 2017 WIT recipients include Ritika Chowdhary, University of Sydney; Wiezhen Liu, Washington State University; Tine Thach, Aarhus University and Sarrah Ben M’Barek-Ben Romdhane, Biotechnology Center of Borj CĂ©dria, Tunisia.

In the following interview, Krause shares past experiences, her thoughts about the relevance of the award for future generations and her own career direction. 

Q: When did you first become interested in agriculture?

A few weeks into my first semester of undergrad, University of Minnesota alumnus and Nobel Peace Prize Laureate, Norman Borlaug, passed away. Interested in learning more about his contributions, I attended a memorial ceremony on campus. I was inspired by Dr. Borlaug’s work to improve crops around the world and I began to realize that the field of plant breeding combined my interest in science and the natural world with my desire to improve livelihoods and the environment on a global scale.

Around the same time, I was looking for a part-time job on campus and, coincidentally, the wheat breeding lab was hiring an undergraduate laboratory assistant. Despite my lack of experience, I was hired. I got my start in this world assisting graduate students in the lab, greenhouse and field with wheat breeding and genetics experiments and since then I’ve never looked back.

Q: Tell us about the steps that led you here.

I graduated from the University of Minnesota in 2014 with a bachelor’s in applied plant science. As an undergraduate, I researched the genetic mechanisms that govern the plant’s response to fungal diseases in both wheat and barley. I also participated in two summer internships with Monsanto and DuPont Pioneer.

As a doctoral candidate in plant breeding at Cornell, my research interests focus on integrating new phenotyping, genotyping and environmental-sensing techniques to develop new wheat varieties for a range of environmental conditions. I’m currently working with CIMMYT conducting my dissertation research with the Global Wheat Program.

Q: What does receiving the Women in Triticum award mean to you?

It’s an honor to join this international community of women who have also focused their careers around improving livelihoods worldwide by delivering higher-yielding, nutritious and climate-resilient crop varieties. I’m most excited about the opportunity to be joining this network so that we may support one another and learn from each other, as we grow in our careers.

Q: Why is it important to have such a community of women?

There is a plethora of research documenting the importance of including women in the scientific process, but female agricultural scientists continue to face challenges and inequalities when entering the workforce.

Female scientists bring a variety of experiences and viewpoints that may benefit scientific advancement and improve the situation for other women, but studies have shown that they can encounter difficulties in accessing funding, seeking promotions or participating in conferences. Most shocking is that these challenges exist for female scientists in developing and developed countries alike.

Q: What are you currently working on with CIMMYT?

I will be spending a total of two years at CIMMYT, working with the Global Wheat Program to develop new strategies for breeding wheat varieties adapted to different environments. We are interested in integrating advanced genotyping technologies, high-throughput phenotyping techniques and environmental information into prediction models for crop performance. The goal is to more quickly and efficiently develop new, climate-resilient wheat varieties that are tailored to perform well under different environmental conditions.

Currently I’m located at the Campo Experimental Norman E. Borlaug in Ciudad Obregón, Mexico. This past season I worked with CIMMYT’s Bread Wheat Breeding and Wheat Physiology Programs to operate small unmanned aerial vehicles equipped with cameras and sensors in the field. These tools allow us to track each wheat variety’s growth and development throughout the season; the response to stress and the data acquired will be used to improve the efficiency of selection.

Q: Where do you see yourself in 10 years?

I envision myself pursuing a career in agricultural research with the primary focus being global development. I would love to be involved in collaborative research projects aimed at developing climate resilience in agricultural production, improving the nutritional quality of food systems, or addressing the agricultural needs of marginalized communities.

I also hope to continue mentoring students interested in plant sciences and to become more active in educating broader audiences about agriculture through science communications platforms.

To nominate or apply for the Jeannie Borlaug Laube Women in Triticum Early Career Award fill out the application by October 30, 2017 here.

Breaking Ground: Vijay Chaikam develops doubled haploid lines to accelerate maize breeding

TwitterBGvc2Breaking Ground is a regular series featuring staff at CIMMYT

MEXICO CITY (CIMMYT) – As a child helping out on his family’s farm in rural India, Vijay Chaikam dreamed of helping farmers increase the hard won returns of their agricultural labor to improve their livelihoods. Today, he works as a scientist and manager at the International Maize and Wheat Improvement Center (CIMMYT) doubled haploid (DH) facility in Kiboko, Kenya.

He produces DH maize lines, which are highly uniform, genetically pure and stable, making the maize breeding process more intuitive and efficient by simplifying logistics. The outcome of this work is that breeders can develop improved maize varieties faster than ever before so that they can be delivered to the smallholder farmers that need them the most.

“I grew up in a rural village in the state of Andhra Pradesh, India, where my family depended on agriculture for their livelihood,” Chaikam said. “During my childhood, I used to work in the fields, planting, weeding and harvesting alongside my family members to save labor costs. I realized that despite their backbreaking work, most farming families suffer economically. This inspired me to pursue a career in agriculture that would allow me to contribute to reduce the efforts of the farmers and increase their farm income.”

After receiving his doctorate in genetics at West Virginia University in the United States, Chaikam worked at Purdue University and then moved to CIMMYT headquarters in Mexico in 2011 as an associate scientist. His work involved conducting research on developing and implementing maize DH production technology for tropical breeding programs.

In 2016, he moved to CIMMYT’s office in Kenya to manage the Maize DH Facility at KALRO-Kiboko Center, where he assists maize scientists from CIMMYT and partner organizations in the development of DH lines. The efficiency of the DH procedure in maize cuts the time it takes to develop parental lines from six to eight seasons to just two or three seasons.

“My work allows farmers to receive improved maize varieties much quicker,” Chaikam said. “Time is of the essence for farmers planting improved maize varieties in regions affected by stresses such as drought or maize lethal necrosis (MLN). DH technology can drastically cut short the time it takes to derive parental lines in a hybrid maize breeding program.”

CIMMYT’s work on DH has greatly expanded in the past few years. Between 2012 and 2016, CIMMYT scientists produced over 100,000 DH lines, up from less than 5,000 in 2011. However, adoption of the technology is lagging behind in tropical maize breeding programs due to the lack of adapted haploid inducers with high haploid induction rates. The haploid inducers enable generations of haploids – maize varieties containing only one set of chromosomes instead of the usual two sets of chromosomes found in normal diploid maize – at a high frequency. These haploids are then detected using a color marker on the kernel, and the chromosome complement is doubled artificially using treatment with a chromosome doubling agent to derive doubled haploid plants, and consequently seed from those plants.

Chaikam’s current research is aimed at improving the adoption of DH technology in tropical maize breeding programs by developing improved haploid inducers for tropical maize breeding programs, developing novel methods of haploid identification and efficient protocols for chromosomal doubling, and optimizing the agronomic management for deriving doubled haploids. He works closely with breeders to develop ways of using DH lines more efficiently in maize breeding programs. This research could be valuable in the development and deployment of improved maize varieties that benefit smallholder farmers in the developing world. In addition to his work in the DH facility, Chaikam has published several journal articles and book chapters. He has also coordinated scientific training courses.

“I always wanted my work to be relevant to the needs of farmers,” he said, explaining the factors that drew him to work at CIMMYT. “CIMMYT offered such an incredible opportunity, where my day-to-day activities have a direct impact on the development and deployment of improved maize varieties needed by farming communities. I also enjoy working with, talking to and listening to my passionate colleagues who love the work they do to improve the livelihoods of smallholder farmers.”

New Publications: Common platform improves collaboration for research on genetic resources

Select maize varieties from CIMMYT's genebank. Photo: CIMMYT
Select maize varieties from CIMMYT’s genebank. Photo: CIMMYT

MEXICO CITY (CIMMYT) — A common platform through which data on genetic resources can be disseminated to both crop researchers and breeders can strengthen research communities, according to authors of a soon to be published Crop Science study.

Conservation and exploitation of crop wild relative species is a key component in ensuring food security and improving current agricultural output. By identifying traits that express resistance or tolerance to stresses like pests or drought, breeders can incorporate this genetic material into genetic background stocks, which could help mitigate problems imposed by climate change, land degradation and population pressure. This is particularly important in countries that will be more severely affected by the threat of reduced yields.

The researchers of the study “Germinate 3: Development of a Common Platform to Support the Distribution of Experimental Data on Crop Wild Relatives” used the Germinate platform to build web-based information resources on wild barley and potato collections, along with wheat, maize and their wild relatives in a way that could better meet the demands of researchers by developing new data visualization tools and integration with current software.

While the underlying species differ, the approach taken ensured that tools were compatible across all database instances. The researchers found that Germinate offers a common platform that can improve the exploration and wider use of genetic resources in breeding programs globally.

Read the advanced copy of “Germinate 3: Development of a Common Platform to Support the Distribution of Experimental Data on Crop Wild Relatives” and check out other new publications from CIMMYT scientists below.

  • Avoiding lodging in irrigated spring wheat. I. Stem and root structural requirements. 2016. Piñera Chavez, F.J., Berry, P.M., Foulkes, M.J., Jesson, M.A., Reynolds, M.P. In: Field Crops Research. Vol.196, p.325-336.
  • Avoiding lodging in irrigated spring wheat. II. Genetic variation ofstem and root structural properties. 2016. Piñera Chavez, F.J., Berry, P.M., Foulkes, M.J., Molero, G., Reynolds, M.P. In: Field Crops Research. vol.196, p.64-74.
  • Awns reduce grain number to increase grain size and harvestable yield in irrigated and rainfed spring wheat. 2016. Rebetzke, G.J., Bonnett, D.G., Reynolds, M.P., In: Journal of Experimental Botany. vol. 67, no.9, p.2537-2586.
  • Breeding value of primary synthetic wheat genotypes for grain yield. 2016. Jafarzadeh, J., Bonnett, D.G., Jannink, J.L., Akdemir, D., Dreisigacker, S., Sorrells, M.E. In: PLoS One. vol.11, no.9: e0162860.
  • Bulked sample analysis in genetics, genomics and crop improvement. 2016. Cheng Zou, Pingxi Wang, Yunbi Xu. In: Plant biotechnology journal. Vol.14, no.10, p.1941-1955.
  • Forward genetics by sequencing EMS variation induced inbred lines. 2017. Addo-Quaye, C., Buescher, E., Best, N., Chaikam, V., Baxter, I., Dilkes, B.P. In: G3. vol. 7, no. 2, p. 413-425.
  • From stakeholders narratives to modelling plausible future agricultural systems. Integrated assessment of scenarios for Camargue, Southern France. 2017. Delmotte, S., Couderc, V., Mouret, J.C., Lopez-Ridaura, S., Barbier, J.M., Hossard, L. In: European Journal of Agronomy. vol. 82, p. 292-307.
  • Genetic analysis and mapping of adult plant resistance loci to leaf rust in durum wheat cultivar Bairds. 2017. Caixia Lan, Basnet, B.R., Singh, R.P., Huerta-Espino, J., Herrera-Foessel, S., Yong Ren Randhawa, M.S., In: Theoretical and Applied Genetics. vol. 130, no. 3, p. 609–619.
  • Genetic loci conditioning adult plant resistance to the Ug99 Race group and seedling resistance to races TRTTF and TTTTF of the stem rust pathogen in wheat landrace CItr 15026. 2017. Babiker, E.M., Gordon, T., Bonman, J.M., Shiaoman Chao Rouse, M.N., Yue Jin, Newcomb, M., Wanyera, R., Bhavani, S. In: Plant Disease. vol. 101, no. 3, p. 496-501.
  • Genotype by trait biplot analysis to study associations and profiles of Ethiopian white lupin (Lupinus albus) landraces. 2017. Atnaf, M., Kassahun Tesfaye, Kifle Dagne, Dagne Wegary Gissa. In: Australian Journal of Crop Science. vol. 11, No. 1, p. 55-62.

Scaling up research for impact

By scaling up, development practitioners take successful interventions and expand, adapt and sustain them in different ways over time for greater development impact. Photo: CIMMYT/P. Lowe
Bringing a scaling perspective to research projects as early as possible helps keep a focus on what the project actually can and aims to achieve. Photo: CIMMYT/P. Lowe

EL BATAN, Mexico (CIMMYT) – Agricultural innovations, like climate-resilient crops, sustainable land use practices and farm mechanization options, can go a long way toward achieving several U.N. Sustainable Development Goals.

But ensuring research reaches a significant amount of farmers to have widespread impact is challenging.

Projects, programs and policies can often be like small pebbles thrown into a big pond. They are limited in scope, time bound and therefore might fail to have long lasting impact. Through well thought scaling up strategies, development practitioners expect to implement successful interventions and expand, adapt and sustain them in different ways over time for greater developmental impact.

“To have our knowledge and technologies positively impact the livelihoods of large numbers of farmers in maize and wheat based systems is what matters most,” said Bruno GĂ©rard, director of the Sustainable Intensification Program at the International Maize and Wheat Improvement Center (CIMMYT).

Understanding the needs and demands of our stakeholders is crucial in the design and implementation of a research portfolio, he added.

As part of a German Development Cooperation (GIZ) effort to aid the scaling up of agricultural innovations, Lennart Woltering recently joined CIMMYT’s Sustainable Intensification Program. With previous experience working in development in Africa and South Asia, Woltering will play a key role in linking CIMMYT’s research to specific development needs, increasing its relevance and impact.

There is no blue-print for scaling, it depends on the institutional and socio-economic environments, which are very diverse in the various regions where CIMMYT works, said GĂ©rard. He hopes Woltering’s experience with both development and research organizations will further contribute to link the right technical innovations with the people who need them.

Bringing a scaling perspective to research projects as early as possible helps keep a focus on what the project actually can and aims to achieve, Woltering said. Understanding what the drivers are that make widespread adoption happen is critical.

“We do this by making sure scaling processes are an integral part of innovation systems. It is important to understand how conducive environments for scaling can be facilitated and how far we can realistically go,” he added.

Woltering will work to provide a coherent approach to scaling that can be used across the program’s projects, said GĂ©rard.

To see real impact from research, initiatives must move beyond the boundaries of a single organization, Woltering said. New forms of collaboration across different sectors and the opening of new communication channels to share lessons of success when scaling should emerge.

Woltering will develop scaling strategies to facilitate the adoption of sustainable intensification options such as conservation agriculture and water/nutrient efficient practices, and contribute to enhance CIMMYT’s partnerships with public and private sectors.

Previously, Woltering worked as a civil engineer focusing on water management with the International Crops Research Institute for the Semi-Arid Tropics in Africa (ICRISAT), then later moved on to work for a consulting development firm in Germany.  His experience will allow him to better articulate development needs with CIMMYT’s research, increasing the relevance and impact of the organization’s work.

Woltering is one of five experts working at CIMMYT as part of the GIZ sponsored CIM Integrated Experts program. The CIM program aims to strategically place managers and technical experts in public and private organizations in the developing world to pass on their professional knowledge and contribute to capacity building.

 

 

New selection method allows for rapid development of improved maize varieties

Farmers Nuri Bekele, Tefera Tamirat & Melaka Bekele harvest drought tolerant maize in Ethiopia. Photo: P. Lowe/CIMMYT
Farmers Nuri Bekele, Tefera Tamirat & Melaka Bekele harvest drought tolerant maize in Ethiopia. Photo: P. Lowe/CIMMYT

MEXICO CITY (CIMMYT) –  Marker-assisted recurrent selection (MARS) is helping maize breeders develop higher yielding and drought-tolerant improved varieties faster than ever before, according to a recent study from scientists at the International Maize and Wheat Improvement Center (CIMMYT).

“With conventional breeding, it often takes up to 7-8 years for varieties to reach farmers,” said Yoseph Beyene, a CIMMYT maize breeder working with the CGIAR Research Program on Maize (MAIZE) and one of the authors of the study. “With MARS, those varieties take only 5 years to reach farmers, and display greater genetic gain, even under drought conditions”

The study “Improving Maize Grain Yield under Drought Stress and Non-stress Environments in Sub-Saharan Africa using Marker-Assisted Recurrent Selection” found that by using MARS, breeders can develop new maize varieties farmers need faster and cheaper than conventional breeding methods by reducing the breeding cycle, showing scientists which varieties have desired traits at a quicker rate. This study focused on developing improved, drought-tolerant and high-yielding tropical maize varieties for areas such as sub-Saharan Africa that suffer from frequent drought and an unpredictable climate.

“Climate change is changing environments faster than agriculture can naturally adapt,” said Beyene. “It is crucial that farmers are able to access drought-resistant maize varieties as quickly as possible so that they can adapt to these new conditions,” he said.

MARS also dramatically cuts costs by using genotypic data to predict the best maize varieties before planting them. Previously, breeders would have to visually examine and select the best maize varieties every year.

The study found that MARS can be used to improve maize varieties in both drought and optimum environments throughout sub-Saharan Africa, where it is the most important staple food for over 300 million people. The study used MARS to estimate the genetic gain for 10 biparental tropical maize populations and found that overall, the grain yield for the 10 populations increased by 105 kilograms (kg) per hectare per year under well-watered and 51 kg per hectare per year under water-stressed conditions using MARS. The subsequent generations of test crosses were found to have significantly greater grain yields than their parents and commercial checks, suggesting that MARS has excellent potential for increasing genetic gain under both drought and optimum environments in sub-Saharan Africa.

Over 1,000 improved maize lines, including 352 doubled-haploid lines, have been developed from each cycle of the 10 biparental populations used in this study, and tested in multi-location trials. Several hybrids were derived using lines developed through MARS and pedigree methods. The best hybrids from each population are currently under national performance trials and are expected to be released soon for commercialization in sub-Saharan Africa. CIMMYT is one of the first research organizations to apply this technology to maize breeding specifically for the needs of smallholder farmers.

This study was implemented under the Water Efficient Maize for Africa (WEMA) project, supported by the Bill and Melinda Gates Foundation, the Howard G. Buffet Foundation and the U.S. Agency for International Development (USAID).

Read the study “Performance and grain yield stability of maize populations developed using marker-assisted recurrent selection and pedigree selection procedures” published in Euphytica (2016) 208:285–297 for more information.

Closing the circle: Kanwarpal Dhugga works at CIMMYT

kanwarpalBreaking Ground is a regular series featuring staff at CIMMYT

EL BATAN, Mexico (CIMMYT) – Growing up on a small farm in India’s northwest Punjab state, Kanwarpal Dhugga was a young boy when the first Green Revolution wheat varieties arrived in his village. Now stationed in Mexico as Principal Scientist and head of biotechnology for agricultural development at the International Maize and Wheat Improvement Center (CIMMYT), Dhugga has witnessed vast changes in his boyhood community.

“It was tight for families there, living from season to season with no extra money to spend,” Dhugga said, reflecting on the period during the 1960s before new high-yielding, disease resistant wheat varieties began to reshape agricultural potential throughout Asia. “Farmers used to plant a mixture of wheat and chickpeas.  If rains were good, you got good wheat yield; if there was a drought, you got at least chickpeas.”

The use by farmers of the new, high-yielding wheat varieties developed by the late Nobel Peace Prize laureate Norman Borlaug, who was head of the wheat program at CIMMYT headquarters in Mexico, coincided with the introduction of electric power to Dhugga’s area.  Electricity enabled pumping underground water for irrigation, making farming more predictable. Within a couple of years, everyone was growing new, more resilient semi-dwarf wheat varieties and yields had increased substantially.

The community was poor and without many educational resources. Dhugga recalls sitting on the ground at elementary school in India and carrying his books in a satchel along with a burlap gunnysack, which he used as a mat to sit on. Despite challenges, his perseverance and determination eventually took him to Punjab Agricultural University, where he earned a master’s degree in plant breeding, then to the University of California, Riverside for a doctoral degree in botany and plant genetics, and finally for a post-graduate degree at Stanford University, where he worked directly with Peter Ray, renowned biologist and now a Stanford emeritus professor.

“I started in genetics and finished in biochemistry,” Dhugga explained. “Science grew on me and I became so fixated that I couldn’t live without it, and that after I had no clue growing up what I wanted to become in life. The vision extended only as far as the next year.”

From 1996 through 2014, he worked at DuPont-Pioneer, the multinational seed producer, where his work included leading research on expressing high-value industrial polymers in maize grains and soybean seeds, developing in-field screening tools to screen maize hybrids for stalk strength, improving nitrogen use efficiency in maize, and on developing a combined genetic marker x metabolites model for predicting maize grain yield, demonstrating that the combined model was more effective than genetic markers alone.

“I was a developer and supplier of advanced plant genetics for a company that was providing high-quality maize seed to farmers around the world, but I felt like something was missing – a social component,” Dhugga said.

Taking a job at CIMMYT, where the focus is on helping improve food security for poor smallholder farmers in the developing world, satisfied this urge, according to Dhugga. “It felt like completing a circle, given where I came from and the role of CIMMYT in improving farmers’ food security and incomes.”

At CIMMYT, he is leading work to apply a recent technology for what is commonly called “gene editing.” Known as the CRISPR-Cas9 system, it allows researchers to enhance or turn off the expression of “native” genes as well as modify the properties of the translated proteins in crops like maize or wheat more simply and effectively than with other methods, including transgenics.

“To deactivate a gene and thus learn about what it does used to be a major undertaking that took years, and even then you didn’t find some of the things you wanted to,” Dhugga explained. “With the new technology, you can find what you’re looking for in much less time. That’s the main focus of my work right now.”

CIMMYT is collaborating with DuPont-Pioneer to fine map, isolate and validate a major gene in maize for resistance to maize lethal necrosis, which appeared in sub-Saharan Africa in 2011 and has caused major losses to maize crops, decreasing food security and the ability of the smallholder farmers to provide for their families.

“We already know a locus that confers high levels of resistance against the combination of viruses that cause the disease,” he said. “Once we have the specific gene, we can edit it directly in elite maize lines used for hybrid production in Africa, eliminating the need for generations of expensive crosses to get uniform lines with that gene.”

Dhugga greatly respects living systems and, rather than viewing his work as inventing new methods, believes he is drawing out the best potential of nature.

“The biology for these processes is already there in nature; we just need to rediscover and apply it to benefit farmers and ensure food security,” he said.

New Publications: Successful agricultural interventions require social shifts, not just technological

Wheat harvest in Juchitepec, Estado de México. Photo: P.Lowe/CIMMYT
Wheat harvest in Juchitepec, Estado de México. Photo: P.Lowe/CIMMYT

MEXICO CITY (CIMMYT) – Traditionally, agricultural research organizations measured impact by the number of technologies developed, with less attention given to whether or not these technologies were adopted by farmers and the impact they had in communities.

Today organizations must clearly demonstrate impact in farmers’ fields. Research and extension approaches based on agricultural innovation systems, or networks of organizations within an economic system that are directly involved in the creation, diffusion and use of scientific and technological knowledge, as well as the organizations responsible for the coordination and support of these processes.

This shift represents a new focus on innovation as a social process, as opposed to a research-driven process of technology transfer.

Despite growing interest in agricultural innovation system, little is still known about the most effective ways to operationalize these systems, especially within short and medium timeframes, according to researchers from the International Maize and Wheat Improvement Center (CIMMYT) in a new paper “Agricultural research organisations’ role in the emergence of agricultural innovation systems.”

The study claims that external input is often needed to generate an agricultural innovation system, and that network brokers – actors like NGOs and others, who catalyze collective action by enhancing farmers’ access to information and technical assistance – play a crucial role.

The authors conclude that while scientific research is an important component of the development of an agricultural innovation system, it is not enough; more emphasis has to be directed at extension and education of different actors to achieve a genuine paradigm shift in agricultural innovation.

Read the full study here and check out other recent publications from CIMMYT staff below.

  1. Agricultural research organisations’ role in the emergence of agricultural innovation systems. 2017. Hellin, J.; Camacho Villa, T.C. Development in Practice 27 (1) ; 111-115.
  2. Evaluation of the APSIM model in cropping systems of Asia. 2017. Gaydon, D.S.; Singh, B.; Wang, E.; Poulton, P.L.; Ahmad, B.; Ahmed, F.; Akhter, S.; Ali, I.; Amarasingha, R.; Chaki, A.K.; Chen, C.; Choudhury, B.U.; Darai, R.; Das, A.; Hochman, Z.; Horan, H.; Hosang, E.Y.; Vijaya Kumar, P.; Khan, A.S.M.M.R.; Laing, A.M.; Liu, L.; Malaviachichi, M.A.P.W.K.; Mohapatra, K.P.; Muttaleb, M.A.; Power, B.; Radanielson, A.M.; Rai, G.S.; Rashid, M.H.; Rathanayake, W.M.U.K.; Sarker, M.M.R.; Sena, D.R.; Shamim, M.; Subash, N.; Suriadi, A.; Suriyagoda, L.D.B.; Wang, G.; Wang, J.; Yadav, R.K.; Roth, C.H. Field Crops Research 204 : 52-75.
  3. Forward genetics by sequencing EMS variation induced inbred lines. 2017. Addo-Quaye, C.; Buescher, E.; Best, N.; Chaikam, V.; Baxter, I.; Dilkes, B.P. G3 7 (2) : 413-425.
  4. Genetic analysis and mapping of adult plant resistance loci to leaf rust in durum wheat cultivar Bairds. 2017. Caixia Lan; Basnet, B.R.; Singh, R.P.; Huerta-Espino, J.; Herrera-Foessel, S.; Yong Ren; Randhawa, M.S. Theoretical and Applied Genetics 130 (3) : 609–619.
  5. Genotype by trait biplot analysis to study associations and profiles of Ethiopian white lupin (Lupinus albus) landraces. 2017. Atnaf, M.; Kassahun Tesfaye; Kifle Dagne; Dagne Wegary Gissa. Australian Journal of Crop Science 11 (1) : 55-62.
  6. Application of remote sensing to identify adult plant resistance loci to stripe rust in two bread wheat mapping populations. 2016. Pretorius, Z.A.; Caixia Lan; Prins, R.; Knight, V.; McLaren, N.W.; Singh, R.P.; Bender, C.; Kloppers, F.J. Precision Agriculture. Online First.
  7. Genomic prediction models for grain yield of spring bread wheat in diverse agro-ecological zones. 2016. Saint Pierre, C.; Burgueño, J.; Crossa, J.; Fuentes Dåvila, G.; Figueroa López, P.; Solís Moya, E.; Ireta Moreno, J.; Hernåndez Muela, V.M.; Zamora Villa, V.; Vikram, P.; Mathews, K.; Sansaloni, C.P.; Sehgal, D.; Jarquín, D.; Wenzl, P.; Sukhwinder-Singh. Nature Scientific reports 6 :  27312.
  8. Genomic prediction using phenotypes from pedigreed lines with no marker data. 2016. Ashraf, B.; Edriss, V.; Akdemir, D.; Autrique, E.; Bonnett, D.G.; Crossa, J.; Janss, L.; Singh, R.P.; Jannink, J.L. Crop Science 56 (3) : 957-964.
  9. Identification of genomic associations for adult plant resistance in the background of popular South Asian wheat cultivar, PBW343. 2016. Huihui Li; Sukhwinder-Singh; Bhavani, S.; Singh, R.P.; Sehgal, D.; Basnet, B.R.; Vikram, P.; Burgueño, J.; Huerta-Espino, J. Frontiers in Plant Science 7 (1674) : 1-18.
  10. Mapping of spot blotch disease resistance using NDVI as a substitute to visual observation in wheat (Triticum aestivum L.). 2016. Suneel Kumar; Roder, M.S.; Singh, R.P.; Kumar, S.; Ramesh Chand; Joshi, A.K.; Kumar, U. Molecular Breeding 36 (95) : 1-11.

Despite hardships, women running own households provide model of empowerment and innovation

GENNOVATE research reveals women-headed households often experience high rates of poverty reduction. Photo: CIMMYT/P. Lowe
GENNOVATE focus groups testified to high rates of poverty reduction in communities with more numerous women-headed households. Photo: CIMMYT/P. Lowe

Sometimes change unfolds where least expected.

In many cultures, households headed by widows are among the poorest and most excluded population groups. Across diverse rural areas, and especially where customary laws continue to exert strong force, widows are fully expected to relinquish their family home, farmlands, livestock and other assets to their deceased husband’s family — leaving them destitute, even as they must alone provide for their children. The impoverishment and ostracism endured by women and children involved in divorce or separation can be even more severe as they may lose respect from the community.

However, stories of resilience, change and achievement emerged from the testimonies of many women running their own households who participated in a recent qualitative study exploring gender and innovation processes in 27 villages in maize farming regions of Ethiopia, Malawi, Mexico, Nepal, Nigeria, Tanzania and Zimbabwe.

The research, conducted under the umbrella of GENNOVATE, a CGIAR comparative research initiative funded by the Bill & Melinda Gates Foundation, explored how gender norms affect agricultural innovation. It showed that many of the “unattached” women in our sample rated themselves as strongly empowered by their experiences with running their households and with managing their own farms and livestock and petty trades to make ends meet. Moreover, focus groups testified to some of the highest rates of poverty reduction in communities where we received reports of more numerous women-headed households.

These findings are consistent with wider trends underway in sub-Saharan Africa where women-headed households now constitute one-in-four of the region’s households and are experiencing faster poverty reduction than male-headed households, according to a recent World Bank study.  Heavy male migration is part and parcel of these trends.

In our data we found many widows innovating in their agricultural livelihoods and working their way out of poverty.

“I am proud to say that I am one of them,” said a 42-year-old woman farmer from a village in Ethiopia, describing how she lifted her household out of poverty. “I have been moving up since I divorced my husband and started raising my eight children alone. I have rented land . . . and entered into equb (an informal savings group) to buy inputs for my land. I also am growing vegetables as well as selling firewood.”

In another Ethiopian village, a 35-year-old father of six and farmer relates how a widow in his village escaped poverty and became “known in the area for her bravery.” He shares the story of how she got ahead by processing and selling false banana (a root crop processed into a variety of staple goods) in the market, and using that income to purchase a heifer to get involved in cattle breeding activities.

We also heard about a 48-year-old woman in Ethiopia who separated from her husband and managed to provide for eight children by using farming techniques she learned from him and by planting improved maize seeds. She was also one of the first to cultivate potatoes in her area and became one of the female model farmers of her area.

Photo: CIMMYT/P. Lowe
GENNOVATE case studies reveal more restrictive gender norms in rural Ethiopia than other villages studied. Photo: CIMMYT/P. Lowe

The GENNOVATE case studies set in rural Ethiopia feature more restrictive gender norms — or societal rules governing men’s and women’s everyday behaviors — than many other villages we studied.  These are communities where gender norms highly discourage women from participating in household decision making, moving about their village unaccompanied or engaging in paid work. In order to provide for themselves and their children, it is deemed acceptable for women who head their households to work around these social conventions.

Study participants were careful to distinguish between the more fluid gender norms that apply to widows and other women who head their households in comparison to the more restrictive norms for married women.

A participant in the focus group of poor women in a village of Malawi observed that it is easier for a widow to work for pay, “because they have no one to provide for their needs.”

“They are also free to make decisions about working because they are not controlled by their husbands like married women,” she added. In a poor indigenous community of Mexico, a member of the men’s nonpoor focus group declared that the only kind of women to leave their village in order to vend in a market would be widows, because otherwise women “work in the home.”

One of the most unexpected findings to emerge from the GENNOVATE maize case studies is the disproportionate numbers of women who report heading their households in our sample of semi-structured interviews with women “innovators.” They had been identified for these interviews because they are known in their village as liking to try out new things. Among the 54 women innovators interviewed, 21 — nearly 40 percent — report themselves as de jure heads of household — single, widowed, separated, or divorced. This figure does not include women interviewed who report their status as married but whose husbands may be away working. By comparison, among the 54 men innovators interviewed there was only one unmarried man and one widower.

“I have power and freedom to make most major life decisions because I’m now the husband and the wife,” said a 42 year-old widow and mother of six children from 2 to 19 years old from a village in Nigeria.

During her interview, she shared details of how her yields improved from adopting hybrid maize and new practices such as planting only two seeds per hole. “Before now, I used to drop four to five seeds in a hole,” she said, explaining that she learned about improved practices from the local extension agent.

Women who head their households often face great struggles. In Ethiopia, especially, but in other countries as well, testimonies gathered attest to the hard lives, impoverishment, loss of respect and exclusion still endured by women running their own households.

“All the burden is on me,” said a widow from a village in Nigeria, explaining the difficulty of taking responsibility for every aspect of caring for her family.

Yet, across diverse contexts, we find these women moving about the village, accessing information, interacting with the opposite sex, encountering opportunities to apply new learning and assuming leadership positions. Such findings suggest that surveys which target female-headed households, and compare them with male-headed households, may not accurately capture important barriers to agricultural innovations faced by most women.

Our research suggests that women heads of households may offer entry points for strengthening agricultural innovations at the local level as they can provide role models which may help to shift local normative environments for other women and men. More research is needed, however, to identify approaches for supporting these local change agents in ways that ease stigma, work burdens and other risks.

Patti Petesch is GENNOVATE’s expert advisor and a CIMMYT associate researcher.

Lone Badstue chairs the GENNOVATE Executive Committee and CIMMYT’s strategic leader for gender research.

CIMMYT launches new program to promote gender equity in agricultural research

CIMMYT set to implement a series of training courses to sharpen gender skills in agricultural research for development. Photo: CIMMYT/P. Lowe
CIMMYT is set to implement a series of training courses to sharpen skills in gender and agricultural research for development. Photo: CIMMYT/P. Lowe

EL BATAN, Mexico (CIMMYT) – In a move to bolster gender equity in agriculture, the International Maize and Wheat Improvement Center (CIMMYT) will launch a series of training courses promoting the integration of gender awareness and analysis in research for development.

“Gender is a defining factor in farming and influences many areas, for example, resource ownership and adoption of new technologies,” said Marion BĂŒttner, a gender specialist at CIMMYT. “These courses will help researchers understand the importance of gender roles, relations and norms in agriculture and integrate gender analysis into their work, strengthening agricultural research for development outcomes.”

Although women account for 43 percent of the agricultural labor force in developing countries, they are 30 percent less productive than men, according to the U.N. Food and Agriculture Organization (FAO). This is due mainly to unequal access to extension services and resources, such as land and improved seed.

Despite such trends, agricultural research often fails to include gender analysis in projects, opting instead for a gender-unaware approach that neglects women’s and men’s important roles and their different needs and opportunities in agriculture, BĂŒttner said. “The trainings are an important step to address this gap,” she said.

The Gender Capacity Strengthening Program was developed in partnership with the Royal Tropical Institute (KIT in its Dutch acronym) gender training team and Cultural Practice, LLC. The sessions will be rolled out from April for researchers and support staff at CIMMYT offices in Africa, Asia and Latin America.

The main focus of agriculture for development is to research the biophysical aspects of introducing new agriculture technologies and management practices. This often diverts attention from the social analysis that reveals the human context in which new technologies and practices are introduced, said Franz Wong, a senior gender advisor at KIT who will be one of the training facilitators.

Failing to understand gender issues in a specific local context may cause contrary results to what researchers set out to accomplish, BĂŒttner said. For example, the mechanization of an agricultural activity may lead to reduced drudgery for women. However, the same process may also result in men taking over these now successful activities, which could shift power dynamics between men and women and potentially increase already existing inequalities between genders.

“To gain the most knowledge and impact from agriculture for development initiatives, researchers should consider what impact interventions will have on both men and women,” BĂŒttner said. “The concept of gender is often confused with simply adding women to strategy development, but it’s not that straightforward. It’s about addressing the needs and constraints of both men and women and changing relations to improve the situation for all.”

BĂŒttner refers to gender-responsive research, which is designed to ensure that both women and men benefit from research interventions. It analyzes and takes into account how gender relations influence men and women’s ability to access and adopt improved agricultural technologies, including new knowledge and practices, as well as how policies and other interventions affect women and men differently.

Large donors like the Bill & Melinda Gates Foundation, the United Stated Agency for International Development (USAID) and German Corporation for International Cooperation (GIZ, for its acronyms in German) require gender-responsive research, which is part of the reason why gender analysis must become a standard process for researchers, BĂŒttner added.

The program aims to position gender analysis as a routine process at all stages of the research cycle. Different training modules offer insight into gender-responsive research, including developing and implementing projects with gender integration and setting indicators to measure gender outcomes.

“Raising awareness of the benefits gender analysis has on the impact of agriculture for development projects is the best promoter of its inclusion in research,” said Maitrayee Mukhopadhyay, a senior gender advisor at KIT who aided in the development of the program.

“Many agriculture for development researchers do not see the relevance of gender for their work because they lack adequate training and exposure to gender analysis and knowledge,” she added.

Pilot workshops of the program were delivered last October at CIMMYT’s headquarters and gained strong reviews, with participants reporting increased gender awareness and knowledge of practical methods to integrate gender into projects.

Researchers are keen to integrate gender once they become aware of how gender-responsive research helps to make an assessment of how agriculture is organized in a community, and how it aids the design and delivery of relevant agricultural technologies that complement gender roles or transform them to increase equality, Wong added.

Both BĂŒttner and Wong said the gender training was purposely designed to be practical and interactive so that participants could apply methods to their areas of expertise.

The program will begin in April in Ethiopia, followed by sessions in other CIMMYT offices in Kenya, Zimbabwe, Bangladesh, India, Nepal and Mexico.

BĂŒttner is one of five experts working at CIMMYT as part of the GIZ sponsored CIM Integrated Experts program. The CIM program aims to strategically place managers and technical experts in public and private organizations in the developing world to pass on their professional knowledge and contribute to capacity building.

Breaking Ground: Xuecai Zhang prepares future generation of crop breeders

TwitterBG8Breaking Ground is a regular series featuring staff at CIMMYT

EL BATAN (CIMMYT) — Xuecai Zhang wants to merge traditional maize breeding methods with new software and other tools to help improve farmers’ yields faster than ever.

“In the next three decades we need to increase agricultural production by 70 percent to meet projected food demand,” said Zhang, a maize genomic selection breeder at the International Maize and Wheat Improvement Center (CIMMYT). “However, crop yields, while improving, are not increasing quickly enough to meet this challenge. We must explore new methods and technologies that can speed up our crop breeding processes if we hope to feed a world with over 2.3 billion more people by 2050.”

Growing up in Henan province, China, Zhang’s mother was a teacher who instilled a love of science in him from a young age.

“I loved exploring outside and seeing how plants grew — I always wanted to know how they worked,” said Zhang. “Maize was naturally interesting to me because it’s the second most grown crop in Henan, and is becoming a very important crop in China overall.”

Zhang first arrived at CIMMYT in 2009 while completing a doctorate in applied quantitative genetics. He subsequently returned as a postdoctoral fellow in 2011 to undertake molecular breeding and coordinate CIMMYT’s maize genomic selection program.

Since his return, he has focused mainly on helping breeders and statisticians work together to create new tools that can help accelerate the breeding process through genomic selection.

“It’s crucial that as breeders, we’re able to use genomic selection in our work,” Zhang said. “Not only does it speed up the breeding process to deliver better, faster results to farmers in the field, applied well it’s also a more cost-effective option.”

Conventional plant breeding is dependent on a researcher going into the field, observing the characteristics of a plant based on how its genotype interacts with the environment, then painstakingly selecting and combining those materials that show such favorable traits such as high yield or drought resistance.  This process is repeated again and again to develop new varieties.

Genomic selection adds DNA markers to the breeder’s toolkit. After initial field evaluation breeders are able to use DNA markers and advanced computing applications to select the best plants and predict the best combinations of plants without having to wait to evaluate every generation in the field. This speeds up the development of new varieties as more cycles of selection and recombination can be conducted in a year compared with field selection alone.

The cost of hiring a human to go and collect phenotypic data for conventional breeding is increasing, while conversely the costs associated with genomic selection are getting lower as genotyping and computing technology becomes more affordable, according to Zhang.

“Breeders need to think about where the technology is pushing our field,” he said. “They will increasingly have to be versed statisticians and computer scientists to effectively apply genomic selection to their work, and I want to help ensure they have the skills and tools to make the most of the technology.”

Zhang has helped demonstrate to breeders in Latin America, Africa and Asia of the value of genomic selection by showing that the technique can improve the prediction accuracy of successful varieties in comparison to conventional breeding. He also credits joint efforts like the GOBII project, a large-scale public-sector effort supported by the Bill & Melinda Gates Foundation, to apply genomic selection techniques to crop breeding programs across the developing world, as key towards curating the necessary data for genomic breeding programs.

“In the future, I hope to continue to help build better tools for breeders to move towards genomic selection,” Zhang said. “I chose to breed maize because of the potential impact it has to help smallholder farmers globally. Compared with other crops the yield potential of maize is very high, so I want to ensure we are using the best resources available that will help maize reach its full potential.”

Breaking Ground: Cesar Petroli on data-driven use of maize genetic diversity

TwitterBG5Breaking Ground is a regular series featuring staff at CIMMYT

EL BATAN, Mexico (CIMMYT) – Access to genetic data can revolutionize research partnerships and lead to major benefits for crop breeders aiming to help smallholder farmers boost yields, according to Argentinian geneticist Cesar Petroli.

Hailing from Reconquista in Santa Fe Province, Petroli now works for the MasAgro program at the International Maize and Wheat Improvement Center (CIMMYT) and is funded by Mexico’s Ministry of Agriculture (SAGARPA). He first became curious about genetics in the mid-1990s when it was a relatively new field in Argentina and the National University of Misiones offered the only bachelor’s degree in the country. Petroli initially focused on cattle and sheep genetics, which gave him his first introduction to molecular markers, which shed light on characteristics of the organism.

His interest in data and plant genetics took root while he was a student. While completing his doctoral degree at the University of Brasilia in partnership with EMBRAPA, Brazil’s agricultural research body, Petroli began to work on the eucalyptus tree with Diversity Arrays Technology (DArT), an Australian enterprise specializing in developing technologies for whole genome profiling.

At that time, CIMMYT wanted to create what was subsequently to become the Genetic Analysis Service for Agriculture (SAGA) using a platform based on the DArT method. Petroli was the perfect fit. Not only did he bring expertise in sequencing and low-cost DNA fingerprinting, he also brought experience of application of large amounts of data in research; in particular, his experience in eucalyptus.

At the heart of operations at the SAGA laboratory is the Illumina HiSeq 2500 sequencing system, one of only three in Mexico, where CIMMYT is headquartered.  Petroli and his team have the capacity to determine the genetic make-up up to 2,500 maize samples per week for both CIMMYT and its partners, generating vast quantities of data in the process.

“We determine the genetic make-up maize and wheat varieties and collections,” Petroli said. “This can help maize breeders to identify patterns in the DNA which are associated with characteristics such as drought and heat tolerance. These patterns or molecular signposts can then be used to help select the best materials for breeding,” he added, explaining that heat and drought resistant maize and wheat varieties not only help present-day farmers, but could also mitigate potential future risks to global food security from the impacts of climate change.

The data generated when fingerprinting thousands of maize and wheat samples provide opportunities for scientific exploration and synergies; while one team may be exploring heat and drought tolerance, another team can use the same DNA fingerprint data to explore other characteristics such as disease tolerance.

“Sharing data for use by interested breeders broadens collaboration and maximizes benefits to smallholder farmers,” Petroli said, describing his enthusiasm for making data publicly available. “Accessible data increases the impact of our research and allows the global public to benefit from the wealth of knowledge we generate.”

In the first six years of the MasAgro program, more than 2 billion genotypic data have been made available in the Germinate and Dataverse platforms. Petroli’s work forms part of bigger efforts at CIMMYT to study and characterize genetic diversity for use in breeding programs.

CIMMYT scientist takes lead role in American Agronomy Society’s sustainable intensification community

Timothy Krupnik, systems agronomist at CIMMYT (right) has assumed leadership of the recently formed Sustainable Intensification community, part of the American Society for Agronomy’s (ASA) Environmental Quality section. Above, Krupnik partners on project with the International Rice Research Institute (IRRI) on farming system diversity studies and potential for sustainable intensification in Bangladesh. Photo: A. Kurishi /CIMMYT

MEXICO CITY (CIMMYT) – Timothy Krupnik, systems agronomist at the International Maize and Wheat Improvement Center (CIMMYT), has assumed leadership of the recently formed Sustainable Intensification community of the American Society for Agronomy’s (ASA) Environmental Quality section.

Krupnik founded the community in 2016 with the previous leader, Cameron Pittelkow, assistant professor at the Department of Crop Sciences at the University of Illinois at Urbana-Champaign. Vara Prasad, professor at the Department of Agronomy at Kansas State University and director of the university’s Sustainable Intensification Innovation Lab, joined Krupnik in 2016 as vice leader of the community.

ASA is a scientific society dedicated to promoting the transfer of knowledge and practices to sustain global agronomy. The society’s goals include understanding how agriculture affects the environment and how agricultural management can be improved to promote air, soil and water quality through its environmental quality section. The ASA currently has over 8,000 members.

“The sustainable intensification community provides a forum for advancing interdisciplinary science to improve the  productivity of the world’s crop and livestock systems through studies that utilize agronomic, economic, environmental and social sustainability criteria to develop actionable recommendations,” says Krupnik.

Sustainable intensification (SI) is a key agricultural policy priority in both developing and developed nations. SI farming puts methods into place that increase food production from existing farmland while minimizing pressure on the environment. Farmers using these approaches in turn minimize agricultural land expansion, and consequently biodiversity loss, while maximizing the use and flow of ecosystem services to and from farmlands.

CIMMYT staff taking measurements of water infiltration rate. Photo: T. Krupnik/CIMMYT

The SI community is one of six communities of scientists under the society’s Environmental Quality section. The community brings together members from across the ASA to examine the challenges, limitations and opportunities for SI in agronomic production systems across the globe.

“The work we do tackles the trade-offs between increased farming systems productivity and the risk of environmental pollution, or undesirable social outcomes,” according to Krupnik. “The community is a platform for advancing these issues within the ASA, while also advocating for solutions to some of agriculture’s most pressing sustainability problems.”

The ASA’s first SI session was held in November 2016 at the ASA’s annual meeting in Phoenix, Arizona. Symposia speakers included David Cleary, director of agriculture at The Nature Conservancy, Achim Dobermann, director and Chief Executive at Rothamsted Research, Bruno Gerard, director of the Sustainable Intensification program at CIMMYT, Sieg Snapp, professor of soils and cropping systems ecology at Michigan State University and Pablo Tittonell, director of the natural resources and environment program at the National Agricultural Technology Institute in Argentina and former chair professor of the Farming Systems Ecology group  at Wageningen University.

Another SI symposium and interactive breakout discussion section on how to assess synergies and tradeoffs between indicators for SI will be held at an upcoming ASA meeting in Tampa, Florida.

More information about the ASA’s SI community can be found here.

Entrenched gender roles threaten women’s longevity in research careers

EL BATAN, Mexico (CIMMYT) — Despite over a decade of implementing policies and programs to promote gender equity in research, some countries have seen careers for women in science, technology, engineering and math (STEM) stagnate and even decrease in some fields.

Research indicates that women start out in equal numbers to their male colleagues – even outnumbering in some cases – while pursuing undergraduate and graduate degrees in STEM fields, but drop off at the doctoral level and even more at the research level, with men now representing 72 percent of the global research pool.

“The age at which many pursue or complete a doctoral degree often coincides with the time people start thinking about having children,” said Denisse McLean, an agrobiodiversity doctoral student at the Scuola Superiore Sant’Anna in Pisa, Italy, who is conducting research at the International Maize and Wheat Improvement Center (CIMMYT) headquartered near Mexico City. “I knew after my master’s I wanted to do my doctorate right away because I know once I have kids, I won’t have as much flexibility.”

“A number of my male classmates study abroad while their spouses are at home with their kids,” McLean said. “In contrast, none of my female classmates have children. I would not be able to travel and work long hours like I do now if I had children of my own.”

Denisse McLean is an agrobiodiversity doctoral student at the Scuola Superiore Sant’Anna who is conducting research at CIMMYT. Photo courtesy of Denisse McLean.

McLean refers to a “maternal wall” which results from expectations that a woman’s job performance will be affected by her taking a leave of absence to have children, or by absences from work to take care of family.

The work environment of a lab or lecture hall frequently does not allow flexibility for child leave or care. Since most women still assume the primary caregiver role regardless of where they live in the world, in heterosexual couples this often results in the woman’s career lagging, not her male partner’s.

“I never had maternity leave,” said Denise Costich, senior scientist and head of CIMMYT’s maize germplasm bank, now over three decades into her career. “There were no provisions in my contracts, either as a graduate student or a postdoctoral researcher, to cover this. I took vacation time to give birth. When my first child was born I took her to the greenhouse with me to check on my experiments, when she was under a week old.”

Costich, who lovingly refers to her three children as her “grad school baby, thesis baby and post-doc baby,” pursued a career in ecological research while raising three kids, at times requiring the deployment of innovative problem-solving skills, including strapping baby seats to lab carts or her baby to her own body in the field. It was at times a challenge to meet the competitive requirements of a career in science, particularly on one occasion when she had to rush to a job interview, just two weeks after giving birth.

According to Costich, tenure positions at any institution can require 80 to 90 hours of dedicated attention a week. Young researchers are also expected to spend 80 to 120 hours a week in the laboratory, putting women with children at an immediate disadvantage.

“I’ve always worked and I’ve never stopped because I know when you ‘take some time off,’ you fall behind, especially in science where the technology changes so quickly,” Costich said. “You get out of the loop and are at an extreme disadvantage trying to play catch up with your career.”

Denise Costich, senior scientist and head of CIMMYT’s maize germplasm bank, conducting field work in Spain with daughter Mara in 1986 (left). On the right, Costich holds maize cobs grown by a farmer on the Nevado de Toluca volcano in Mexico. Photos courtesy of Denise Costich and Jennifer Johnson/CIMMYT.

Both Costich and McLean credit strong support networks for their success, but acknowledge structural changes are needed throughout the research system. Such countries as the United States, that don’t guarantee paid maternity leave or sufficient support for child care must also re-orient their national policies to support working women, Costich said, making reference to her country of origin.

“I was able to make tweaks to the system and keep going, but I know a lot of people who had to give up,” Costich said. “We need to get more women who have gone through these experiences in higher level positions so that we can make effective policy changes.”

Child rearing isn’t the only time women leave their careers to serve as caregivers. Research shows that women also tend to be more likely to take family leave to care for parents, grandchildren and other relatives and were significantly less likely to be employed than their peers, whereas men who take on care giving roles experience no change in employment status.

Reformation of the institutionalized culture and processes that “penalize” a woman for having a family life is vital to ensure more women can have meaningful STEM research careers. Changing generally accepted hiring criteria and accepting flexible work arrangements, publication and research schedules are some of the methods that can help ensure women and men who interrupt their career for family leave will not jeopardize their future careers.

All institutes that are serious about increasing the number of women in their ranks should take these and other steps to remove barriers to women in science, such as bias in the hiring process and peer review, if they want to conduct more effective research.

CIMMYT scientist cautions against new threats from wheat rust diseases

David Hodson, senior scientist with CIMMYT, trains South Asian wheat scientists on the use of handheld surveillance and monitoring devices. Hodson directs the rusttracker.org global wheat rust monitoring system for the Delivering Genetic Gain in Wheat (DGGW) project. Credit: CORNELL/Linda McCandless

EL BATAN, Mexico (CIMMYT) – Scientists are concerned over the proliferation of highly virulent fungal wheat diseases, including two new races of yellow rust – one in Europe and North Africa, the other taking hold in East Africa and Central Asia – and a new race of stem rust emerging in Europe.

The collaborative Global Rust Reference Center (GRRC) hosted by Aarhus University in Denmark and including the International Maize and Wheat Improvement Center (CIMMYT) and the International Center for Agricultural Research in the Dry Areas (ICARDA), was instrumental in identifying the new races of yellow and stem rust.

A strategic tool developed by David Hodson, a senior scientist with CIMMYT plays a key role in monitoring the movement of wheat-rust pathogens, helping farmers combat the disease in time to save crops and prevent food insecurity.

“We see an alarming increase in severe disease, more disease diversity and rapid spread,” said Hodson, who invented the Rust Tracker field surveillance tool.

Last year, the Italian island of Sicily was badly hit by a strain of wheat stem rust – an event not seen in Europe since the 1950s, following concerted efforts by wheat breeders to eliminate it.

Stem rust appears as a reddish-brown fungal build-up on wheat stems or leaves, stunting and weakening plants, preventing kernels from forming, leading to shriveled grain and potential crop losses of 50 to 100 percent.

Dispersal modeling, undertaken by the University of Cambridge and the UK Met Office, which forecasts weather and climate change, indicates that spores from the Sicilian outbreak could potentially have spread within the Mediterranean wheat growing region, but scientists are unsure whether they will successfully over-winter, surviving and proliferating, according to a recent story in the journal Nature.

EARLY WARNING

“Several factors may be influencing the changes and rapid spread: increased travel and trade; increasing pathogen populations; more uniform cropping systems and also climate change, but the rapid changes we are observing highlight the need for an enhanced early-warning system,” said Hodson, a member of an international team of scientists collaborating under the Delivering Genetic Gain in Wheat (DGGW) project administered by Cornell University through the Borlaug Global Rust Initiative (BGRI).

Scientists engaged with the major four-year international project – which has a budget of $34.5 million due to grants equalling $24 million from the Bill & Melinda Gates Foundation and a recent $10.5 million grant from UK Aid (Britain’s Department for International Development, or DFID) – use comparative genomics and big data to develop new wheat varieties. The aim is to help governments provide smallholder farmers in the developing world with seeds incorporating resilience to environmental stresses and diseases through local entrepreneurial distributors.

“The sooner farmers are notified of a potential rust outbreak, the better chance they have to save their crops through fungicides or by planting resilient wheat varieties,” Hodson said.

“It’s a constant challenge. We’re always on the lookout for new diseases and variants on old diseases to put the wheels in motion to aid governments who can distribute seeds bred specifically to outsmart rusts.”

However, the long-term sustainability of these vital disease-monitoring systems is uncertain. Despite the significant investments, challenges remain, Hodson said.

“It’s worrying that just as stem rust is re-appearing in Europe we’re at risk of losing the only stem rust pathotyping capacity in Europe at GRRC, due to a funding shortfall. Given the threats and changes we are observing, there really is a critical need for a long-term strategy to address major crop diseases.”

TRACKER ORIGINS

The online Rust Tracker was originally conceived as a tool to battle stem rust, including the lethal Ug99 race, which since its discovery in 1998 has spread from Uganda into the Middle East and is now found in 13 countries. If Ug99 takes hold in a field it can completely wipe out a farmer’s crop. In developing countries, farmers have more difficulty accessing and affording fungicides, which can potentially save a crop.

Under the Durable Rust Resistance in Wheat project, the predecessor to the DGGW project, BGRI-affiliated scientists aimed to prevent the spread of Ug99 into the major global breadbaskets of China and India. So far, they have succeeded in keeping it in check and raising awareness among governments and farmers of its potentially devastating impact.

“Researchers and farmers are connected in the global village,” Hodson said. “Plant pathogens know no borders. We must leave no stone unturned in our efforts to understand the dynamics of wheat rusts, how they’re changing, where they’re spreading and why. If wheat scientists can help prevent a food crisis, we’re doing our job to help maintain political and economic stability in the world.”