A practical demonstration at Jabalpur. (Photo: CIMMYT)
Agriculture feeds the world. Yet traditional cycles of ploughing, planting, and harvesting crop and biomass products is inefficient of labor and other scarce resources and depletes soil health while emitting greenhouse gases that contribute to climate change.
One effort to ameliorate the negative effects of farming is a set of practices referred to as conservation agriculture (CA), based on the principles of minimal mechanical soil disturbance, permanent soil cover with plant material, and crop diversification.
To deliver advanced, high-level instruction on current innovative science around important aspects of cropping and farming system management to scientists from India, Bangladesh, Egypt, and Morocco, the 12th Advanced Conservation Agriculture Course hosted by the Indian Council of Agricultural Research (ICAR), CIMMYT, and the Borlaug Institute for South Asia (BISA) took place in India from December 10 to 24, 2023.
SK Chaudhari, deputy director general for Natural Resource Management, ICAR; HS Jat, director of the Indian Council of Agricultural Research-Indian Institute of Maize Research (ICAR-IIMR); Arun Joshi, country representative for India and BISA managing director, CIMMYT-India; Mahesh K. Gathala, senior systems agronomist and science lead, CIMMYT-Bangladesh; and Alison Laing, agroecologist, CIMMYT-Bangladesh, all attended the opening ceremony at the National Agricultural Science Complex in New Delhi, India.
This CA course integrated scientific advancements and multidisciplinary techniques to sustainably develop agricultural systems, restore natural resources, and improve climate resilience in agriculture throughout Asia and North Africa. It was held at leading research centers throughout India.
SK Chaudhari welcomed delegates to the course and stressed its practical character and efficacy in promoting CA management innovations, as evidenced by the significant achievements and international reputations of many former attendees and resource personnel.
“As climatic variability and change increase, the need to manage agronomic risks grows, and CA is an effective tool for farmers and scientists in both irrigated and rainfed systems,” said Chaudhari.
Twenty rising scientists from such fields as agronomy, soil science, plant protection, agricultural engineering, plant breeding, and extension, took part in the workshop where they gained a better understanding of all aspects of conservation agricultural methods in rainfed and irrigated ecosystems, as well as exposure to wide networks with prominent international scientists. Organizers prioritized the inclusion of female scientists, who made up 40% of attendees.
The workshop empowered participants to act as conservation agriculture ambassadors and champions of modern, novel agronomic methods when they return to their home institutions.
Rajbir Singh, ICAR assistant director general for Natural Resource Management, and ML Jat, global research program director of Resilient Farm and Food Systems, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) provided keynote addresses at the closing ceremony, held at the ICAR-Central Soil Salinity Research Institute in Karnal, Haryana, India.
The 2023 UN Climate Change Conference (COP 28) took place from November 30 to December 12, 2023, in Dubai, UAE. The conference arrived at a critical moment when over 600 million people face chronic hunger, and global temperatures continue to rise at alarming rates. CIMMYT researchers advocated for action into agriculture’s mitigating role in climate change, increasing crop diversity, and bringing the tenets of sustainability and regenerative agroecological production systems to a greater number of farmers.
Directly addressing the needs of farmers, CIMMYT proposed the creation of an advanced data management system, training, and protocols for spreading extension innovations such as digital approaches and agronomic recommendations to farmers via handheld devices to harmonize the scaling in Africa of regenerative agriculture—diverse practices whose outcomes include better productivity and environmental quality, economic feasibility, social inclusivity, and nutritional security.
CIMMYT presented research showing that in times of fertilizer shortages, targeting nitrogen supplies from inorganic and organic sources to farms with minimal access to nitrogen inputs can improve nitrogen-use efficiency and helps maintain crop yields while limiting harm from excesses in fertilizer use. Examining how food production is driving climate change, CIMMYT promoted ways to lessen climate shocks, especially for smallholder farmers who inordinately suffer the effects of climate change, including rising temperatures and extended droughts. Improved, climate-resilient crop varieties constitute a key adaptation. Boosting farmer productivity and profits is a vital part of improving rural livelihoods in Africa, Asia, and Latin America.
When asked about CIMMYT’s contribution to COP 28, Bram Govaerts, CIMMYT’s director general, highlighted the inclusion of agriculture in the COP28 UAE Declaration on Sustainable Agriculture, Resilient Food Systems, and Climate Action as part of various potential solutions for climate change, an effort that CIMMYT supported through advocacy with leaders and government officials.
“Our participation addressed some of the pressure points which led to this significant recognition. It further cleared our role as an active contributor to discussions surrounding the future of food and crop science,” said Govaerts.
Sarah Hearne presents on the potential of crop diversity to help combat climate change impacts on agrifood systems. (Photo: Food Pavilion/COP 28)
Hearne explained the process that characterizes plant DNA to identify the ideal, climate-adaptable breeding traits. This classification system also opens the door for genetic modeling, which can predict key traits for tomorrow’s climatic and environmental conditions.
“Our thinking must shift from thinking of gene banks to banks of genes, to make vibrant genetic collections for humanity, opening up genetic insurance for farmers,” said Hearne.
Working towards a food system that works for the environment
With an increased strain on food production, sustainability becomes critical for long-term human and environmental health. Sarah Hearne and Tek Sapkota, agricultural systems and climate change senior scientist, from CIMMYT participated in a panel discussion: Responsible consumption and sustainable production: pathways for climate-friendly food systems. They shared how progress in genetic innovation and fertilizer use can contribute to sustainable consumption and a resilient food system.
Fertilizer use remains highly skewed, with some regions applying more fertilizer than required and others, like sub-Saharan Africa, not having sufficient access, resulting in low crop yields. However, to achieve greater food security, the Global South must produce more food. For that, they need to use more fertilizer. Just because increased fertilizer use will increase greenhouse gases (GHGs) emissions, institutions cannot ask smallholder farmers not to increase fertilizer application. Increased GHGs emission with additional fertilizer application in low-input areas can be counterbalanced by improving Nutrient-Use Efficiency (NUE) in high-output areas thereby decreasing GHGs emissions. This way, we can increase global food production by 30% ca with the current level of fertilizer consumption.
Tek Sapkota speaks on how sustainable and efficient fertilizer use can contribute to a resilient food system. (Photo: Food Pavilion/COP 28)
“This issue needs to be considered through a holistic lens. We need to scale-up already proven technologies using digital extensions and living labs and linking farmers with markets,” said Sapkota.
On breeding climate-resilient seeds, Hearne addressed whether farmers are accepting new seeds and how to ensure their maximum adoption. Hearne detailed the partnership with CGIAR and NARS and the numerous technologies advancing the selection of ideal breeding traits, considering shortened breeding cycles, and responding to local needs such as heat or flood tolerance, and traditional preferences.
“Drought-tolerant maize, developed by CIMMYT and the International Institute of Tropical Agriculture (IITA), has benefited over 8 million households in sub-Saharan Africa, which proves that farmers are increasingly receptive to improved seeds. With a better selection of appropriate traits, we can further develop and distribute without yield penalties,” said Hearne.
Regenerative and agroecological production systems
Researchers have studied regenerative and agroecological production systems for decades, with new and old research informing current debates. These systems restore and maintain ecosystems, improving resource use efficiency, strengthening resilience, and increasing self-sufficiency. In his keynote presentation, Sapkota presented 3 examples of regenerative agriculture and agroecological systems: conservation agriculture, cropping system diversification and site-specific nutrient management and their impact on food production, climate change adaptation and mitigation.
“As the science continues to develop, we need to harness digital capacity to co-create sustainable solutions alongside local, indigenous knowledge,” said Sapkota. “While we should continue research and innovation on cutting-edge science and technologies, we should also invest in knowledge sharing networks to spread access to this research; communication is fundamental for further adoption of these practices.”
CIMMYT-BISA-ICAR organized a two-week training program on conservation agriculture (CA) to demonstrate how CA can be a sustainable farming method and an effective tool for farmers and scientists in both irrigated and rainfed systems to manage agrifood system risks.
Participants engage in various activities during the two-week course. (Photo: Richa Sharma Puri/CIMMYT)
The training was jointly conducted by CIMMYT in collaboration with the Borlaug Institute for South Asia (BISA) and the Indian Council of Agricultural Research – Central Soil Salinity Research Institute (ICAR-CSSRI). It was held at the BISA research facilities in Jabalpur and Ludhiana, India, and ICAR-CSSRI in Karnal, India, from 9 December to 24 December 2023.
Creating resilient agrifood systems
Conservation agriculture is an ecosystem approach to agricultural land management based on three interrelated principles: minimal soil disturbance, permanent soil cover, and crop diversification. It helps farmers boost yields, regenerate natural resources, reduce cultivation costs, and create resilient production systems. This helps protect the environment and enhance livelihoods of rural populations, especially in the Global South.
In this region, the rural population depends on natural resources – land, freshwater, and coastal fisheries – for survival. However, the depletion of soil fertility, scarcity of water resources, exacerbated by environmental pollution and climate change-induced stresses, prove challenging to irrigated and dryland agriculture production systems. This puts agrifood systems in South Asia and Africa under tremendous pressure.
Despite the benefits, farmers face significant barriers to adopting CA practices. Lack of knowledge and skills, limited access to appropriate seeds and equipment, lack of policy support, under-developed value chains, and non-acceptance of the fact that CA can yield better results and long-term benefits often prevents farmers from adopting CA practices. Hence, capacity development is vital for the adaptation and scaling of CA-based technologies among smallholder farmers.
To cater to these needs, an Advanced Course on Conservation Agriculture in Asia – a Gateway for Sustainable and Climate Resilient Agrifood Systems was launched in 2010. Later, it was expanded to North Africa. The course links scientific advances and multidisciplinary approaches for upgrading the skills of participants for sustainable intensification and diversification of production systems, enhancing resilience, and conserving natural resources. Since its inception, this training series has directly benefited about 220 researchers, development personnel, and policymakers from 20 countries.
The 12th edition of the training in India saw mid-career researchers and development officers from Morocco, Egypt, Bangladesh, and India participate. Approximately 40% of the attendees were women.
Highlights from the India training program
The inaugural session commenced on 9 December 2023 at the NASC Complex in New Delhi, India. Present at the opening ceremony were chief guest S.K. Chaudhari, deputy director general – Natural Resource Management, ICAR; Arun Joshi, CIMMYT regional representative and managing director of BISA; and Mahesh K Gathala, course coordinator, and Alison Laing, agroecologist from CIMMYT in Bangladesh.
During the welcome address, Joshi informed that CIMMYT and BISA are committed to capacity development of national partners around the world. Chaudhari emphasized the effectiveness in facilitating innovations in CA management. “Under increasing climate variability and change, the need to manage agronomic risks is even more significant and CA is an effective tool for farmers and scientists in irrigated and rainfed systems,” he said.
Participants were introduced to the genesis, background, and objectives of the course by Gathala. Resource persons across diverse disciplines informed the participants about innovative and cutting-edge research in all aspects of CA in both irrigated and dryland cropping systems, including advanced agronomy; mechanization; farm, soil, and water interactions; plant protection, health and crop breeding; climate resilience; farming systems simulation and analysis; agribusiness management; women’s empowerment and gender equity; and agricultural extension and out-scaling. Participants also gained practical knowledge and skills at the BISA research stations where extensive trainings were conducted under the guidance of Ravi Gopal Singh, Raj Kumar, and Lalit Sharma, course coordinators. They organized a series of sessions, along with the hands-on training, at the CA experiment farm in the BISA research facilities. Participants also toured 500 acres of farms at each of the locations. They visited farm facilities such as wheat research trials, molecular laboratory, precision nitrogen nutrition facility, seed processing unit, and farm machinery section.
Workshop participants conduct activities with farmers in the field. (Photo: Richa Sharma Puri/CIMMYT)
The group also visited ICAR-CSSRI facilities in Karnal where R.K. Yadav, director, ICAR- CSSRI, welcomed the participants and highlighted the international and national collaboration activities at CSSRI and how long-term experiments on CA are managing and generating science-based evidence to inform policy and capacity building.
Special visits were organized to farm machinery manufacturers in the region to facilitate industry-participant interactions. Participants visited the Landforce factory at Amargarh, a leading manufacturer of all ranges of farm equipment – from seeding to harvesting and processing. This firm is equipped with the latest manufacturing facilities and techniques such as robotic welding, assembling and automated paint. Later, the group visited the National Agroindustry at Ludhiana, a top manufacturer of planters including bed planters, zero till drills, Happy Seeders, pneumatic and precise planters.
Finally, participants were taken to the farmer fields to interact with the farmers and observe the impact first-hand. They met with a progressive farmer group at Karnal who shared their experiences of practicing CA for the last few years. Post these visits and learning sessions, a closing ceremony was organized at CSSRI at Karnal which was chaired by R.K. Yadav and attended by special guests Rajbir Singh, ADG-ICAR and ML Jat, global director RFFS, ICRISAT. “The session on CA machinery was very helpful and carbon credit was an essential part of our learning. We also got an opportunity to exchange our ideas and experiences with researchers from Morocco, Egypt, and Bangladesh. We sincerely thank the organizers for making us confident and technically smart CA personnels,” said a participant from India.
CIMMYT’s women in science are shaping the future of agriculture. (Photo: CIMMYT)
Much has changed since many CIMMYT scientists attended university. In the past decades, the STEM field was predominantly male, with far less representation from marginalized groups and communities. Challenged by societal prejudices, only a handful of young women pursued STEM subjects, which further influenced career choices made by them, reinforcing the gender gap.
The gender gap in STEM is still significant, but times are changing. “At CIMMYT, we are deeply committed to promoting the voice of youth, marginalized communities, and women to improve the rigor of science for sustainable development. This includes investment in mentorship, learning from champions and pioneers, and appropriate performance assessment guidelines,” said Program Director of CIMMYT’s Sustainable Agrifood Systems, Sieglinde Snapp. “It is a long journey with bumps along the way, but I am proud to be in solidarity with the Global South, where we champion gender and social inclusion every day.”
On International Day of Women and Girls in Science 2024, five CIMMYT scientists who inspire, support, and open doors for many young women and underrepresented groups with their scientific work and pay-it-forward commitment share their motivation behind charting a career in STEM and encourage more young women and make the field more inclusive.
Beyhan Akin, winter wheat breeding lead
Beyhan Akin stands with wheat plants. (Photo: Beyhan Akin)
Hailing from a farming family, Beyhan Akin was always surrounded by the beauty and potential of agriculture. She wished to contribute to her farming community, so 35 years ago, she joined CIMMYT’s wheat research program. Akin reminisced about her early days, how there were few women scientists, and the realization that if she succeeded, she could motivate more to follow in her footsteps.
“Agriculture science is expanding beyond core crop science with huge potential for interdisciplinary research and innovation. I hope young women students and scientists get the opportunity to pursue and excel in these fields. Increased advocacy and investment—grants, fellowships—at an institutional level is crucial to motivating and supporting the aspirations of women in science,” said Akin. “It might have taken a long time for women scientists like us to be in positions of influence, but I hope we can ensure the path is far less challenging today for these young women pursuing agriculture science/STEM.”
Alison Laing, agroecology specialist
Alison Laing stands with women farmers. (Photo: Alison Laing)
“Search out mentors. Don’t be afraid to either ask for help when you need it or to promote your achievements. And build networks,” advises Alison Laing to young women scientists starting in the field. Based in Bangladesh and working across South and Southeast Asia for over 15 years, Laing hopes that girls have opportunities to choose science education and become women with rewarding careers in fields that interest them, especially in non-traditional STEM disciplines.
Laing remembers how her mentor early in her career, the late John Schiller, a rice agronomist at the International Rice Research Institute (IRRI), encouraged her enthusiasm for learning and research. “He taught me so much about doing research in Southeast Asia, and I am indebted to him for his motivation and support in showing me how rewarding and interesting a scientific career can be.” She hopes other young students and scientists will have such mentors in their lives.
Sabina Tiwari, assistant research associate
Sabina Tiwari speaks at a NSAF planning meeting. (Photo: Sabina Tiwari)
Fascinated by nature, plants, and how they thrive in diverse environments, Sabina Tiwari’s journey in science led her to become a plant breeder. “The indefinite potential of agriculture to improve lives made me realize how powerful agricultural science can be. This led to the motivation that I could create a positive difference in the world by being part of crop science and technology while working alongside great scientific minds, both men and women. Today, to young girls aspiring to make a difference in the world, I recommend they empower their cause through science and innovations.”
According to Tiwari, mentorship programs, internships, and job-shadowing experiences that helped her career must be extended to young women to gain practical exposure and knowledge of the possibilities in agriculture science.
Mazvita Chiduwa, associate scientist
Mazvita Chiduwa speaks with a farmer. (Photo: Mazvita Chiduwa)
For Mazvita Chiduwa, a career in agriculture science has been rewarding. “I love the adventure involved in discovery in agriculture. I am inquisitive, and this career allows me to ask questions and seek answers,” said Mazvita.
Chiduwa believes society needs to embrace the participation of women and girls in STEM education and careers and that stereotypes about women not being cut out for STEM, prevalent even today, must be done away with.
To young girls and women aspiring for a career in STEM, Chiduwa says, “Go for it. There is a need for your uniqueness to contribute a wholesome solution to our world’s challenges.”
Luisa Cabrera Soto, research associate
Luisa Cabrera conducts an analysis at a CIMMYT laboratory. (Photo: CIMMYT)
“A feminine perspective and approach are needed to enrich research,” reminds Luisa Cabrera Soto. “In a society where almost half of the members are female, I hope equity and inclusion will help improve under-representation in STEM.”
According to Cabrera, it is essential that women in science continue to challenge the gender prejudices and stereotypes that still exist. “Don’t let the spark of your curiosity go out. As a food science professional, I can say that there are still discoveries to be made and, through it, the probability of finding innovative solutions to global challenges such as food security.”
Researchers, including Sieg Snapp from CIMMYT, are pioneering crops that fertilize themselves by harnessing atmospheric nitrogen. This revolutionary breakthrough promises to slash synthetic fertilizer use, combat environmental damage, and usher in a new era of sustainable agriculture. A leap towards greener, self-sustaining food production is on the horizon.
In Busia, Chris Ojiewo from CIMMYT and partners are spearheading the adoption of high-yielding millet varieties to boost food security and tackle climate change. This initiative aims to equip farmers with quality seeds and modern farming techniques, ensuring the sustainable cultivation of millet, a crop resilient to harsh climates.
Participants convene with key stakeholders of the RAIZ project. (Photo: CIMMYT)
Mutoko, a semi-arid area located in Mashonaland east of Zimbabwe, is prone to droughts and unpredictable rainfall patterns. In an effort to tackle the challenges faced by local smallholder farmers in the region, partners of the Resilience Building through agroecological intensification in Zimbabwe (RAIZ) project organized a participatory workshop to amplify the project’s mandate and gather feedback from key stakeholders. The workshop at Mutoko brought together diverse participants from the Women Affairs, Youth, and Agriculture ministries from the government of Zimbabwe, local leaders and council, extension officers, students, and farmers from Wards 10 and 8. Attending farmers and stakeholders expressed interest in the project that would enable them to face challenges and improve agricultural practices in Mutoko.
Working towards climate-smart solutions: the RAIZ project
RAIZ is a collaborative effort between CIMMYT, the French Agricultural Research Centre for International Development (CIRAD), and the University of Zimbabwe. The project is funded by the European Union, and it focuses on recognizing the strategic role of agroecological approaches in tackling climate change and enhancing sustainable agriculture in arid areas. Research operations are underway in Mutoko to produce scientific evidence and contribute to agroecology policy.
Agroecology offers climate-smart solutions that help farmers adapt to changing conditions, mitigate greenhouse gas emissions, conserve natural resources, and promote food security and resilience in the face of climate uncertainties. RAIZ implements ‘Living Labs’ which strengthens collaboration between diverse stakeholders, including farmers and scientists, whose collective insights help develop demand-driven solutions.
During the Mutoko workshop, Professor and Systems Agronomist Regis Chikowo provided context of RAIZ and emphasized on its goal of helping build resilience in farmers through sustainable approaches. “The aim is not only to help farmers adapt to climate change but also to enable them to thrive in the face of adversity,” said Chikowo.
Students and farmers work together on a visioning exercise. (Photo: CIMMYT)
Building synergies between research and farmer realities
To bridge the gap between research and farmer realities, six student-researchers of RAIZ are working on various aspects of building farmer resilience based on agroecological principles. Their study areas comprise of weed control, climate-proofing with resilient small grain varieties, indigenous knowledge systems, and soil health among others. One student-researcher, in collaboration with farmers, is conducting research on weed control and its impact on crop yield. In all, they are set to articulate and tackle climate change in Mutoko.
“Through my research in weed control and how it affects yields, we are hosting trials with some farmers. We are putting into effect mulch practices gumbeze ramwari, and assessing how it affects yields. We are then intercropping maize with cowpea so that farmers spend less time fighting off weeds, while promoting crop diversification,” says Juliet Murimwa, a Ph.D. student.
Knowledge and sources of information on when to expect rains and average temperatures are vital for farmers to better plan the entire planting-to-harvesting operations. Recognizing this, research student Rejoice Nyoni is studying the types and usefulness of climate services information accessed by smallholder farmers in RAIZ project sites.
“My research is centered on understanding whether smallholder farmers are getting enough knowledge from available sources, including radio which is more prominent,” says Nyoni. Farmers have long relied on traditional knowledge systems to predict weather patterns and plan farming activities. However, with climate change, some of these traditional knowledge sources are being altered. “This season, I will be joining our farmers in Mutoko to discuss and understand which indigenous knowledge systems they use to gather information about weather patterns. We want to find ways to ensure that such wisdom does not get lost, as generations are slowly moving away from traditional cultures and norms,” she adds.
CIMMYT’s work in RAIZ operational areas supported by graduate students, is also testing the effectiveness of newly availed local commercial organic fertilizers and how they contribute to climate smartness when used along with conservation agriculture practices. CIMMYT is also leading the development of an agroecology handbook, set to be used by extension staff and other development practitioners.
In line with the International Year of Millets in 2023, RAIZ actively promotes the cultivation of small grains to enhance the resilience of local farmers. As part of the project, a student researcher is conducting trials in Mutoko to assess the performance of different small grain varieties in the face of climate change. Farmers in Mutoko’s Ward 10 have started experimenting with small grains and have experienced promising yields. A farmer in Mutoko Ward 10, Mudzengera, shared his positive experience with growing sorghum, “Last year we grew three varieties of sorghum. We really liked the new variety as it was not prone to bird attack. On the other hand, the native variety we usually grow is prone to birds feasting on them. We realized good yields which improved household nutrition. I look forward to another farming season with such trials on sorghum,” he says.
Farmers and students work on a shared vision on the future of agriculture. (Photo: CIMMYT)
A shared vision for a sustainable future
A visioning exercise conducted during the workshop, solicited views from the farmers on how they envision the future of agriculture. The session, facilitated by Isaiah Nyagumbo, senior agronomist at CIMMYT, and marking the initiation of Living Laboratories in the district, started with asking farmers what change and developments they would like to see in their ward after three to four years, with respect to agriculture. The farmers were disaggregated into four groups by gender and ward. The emerging aspirations revolved around the twin goals of safeguarding the environment and enhancing crop yields. Farmers from both wards 10 and 8, expressed a shared desire to improve agricultural marketing infrastructure, agroforestry, and the protection of forests, recognizing the critical role that trees play in mitigating climate change and preserving biodiversity. Mulching, which holds immense potential in conserving soil moisture, and adopting mechanized operations were among other aspirations. Furthermore, the participants expressed interest in cultivating small grains, drought-tolerant maize, use of renewable energy, and leveraging digital platforms.
With generous support from USAID, CIMMYT, in collaboration with the lead organization World Food Programme and partner organizations SNV, Tree of Life, and MTDC, has significantly enhanced climate resilience in Zimbabwe through the promotion of conservation agriculture practices under the Zambuko Livelihoods Initiative initiated, since 2020.
After a decade of rigorous effort, CIMMYT, along with public-sector maize research institutes and private-sector seed companies in South Asia, have successfully developed and released 20 high-yielding heat-tolerant (HT) maize hybrids across Bangladesh, Bhutan, India, Nepal, and Pakistan. CIMMYT researchers used a combination of unique breeding tools and methods including genomics-assisted breeding, doubled haploidy (a speed-breeding approach where genotype is developed by chromosome doubling), field-based precision phenotyping, and trait-based selection to develop new maize germplasm that are high-yielding and also tolerant to heat and drought stresses.
While the first batch of five HT maize hybrids were released in 2017, by 2022 another 20 elite HT hybrids were released and eight varieties are deployed over 50,000 ha in the above countries.
In South Asia, maize is mainly grown as a rainfed crop and provides livelihoods for millions of smallholder farmers. Climate change-induced variability in weather conditions is one of the major reasons for year-to-year variation in global crop yields, including maize in Asia. It places at risk the food security and livelihood of farm families living in the stress-vulnerable lowland tropics. “South Asia is highly vulnerable to the detrimental effects of climate change, with its high population density, poverty, and low capacity to adapt. The region has been identified as one of the hotspots for climate change fueled by extreme events such as heat waves and intermittent droughts,” said Pervez H. Zaidi, principal scientist at CIMMYT.
Heat stress impairs the vegetative and reproductive growth of maize, starting from germination to grain filling. Heat stress alone, or in combination with drought, is projected to become a major production constraint for maize in the future. “If current trends persist until 2050, major food yields and food production capacity of South Asia will decrease significantly—by 17 percent for maize—due to climate change-induced heat and water stress,” explained Zaidi.
From breeding to improved seed delivery–the CIMMYT intervention
In the past, breeding for heat stress tolerance in maize was not accorded as high a priority in tropical maize breeding programs as other abiotic stresses such as drought, waterlogging, and low nitrogen in soil. However, in the last 12–15 years, heat stress tolerance has emerged as one of the key traits for CIMMYT’s maize breeding program, especially in the South Asian tropics. The two major factors behind this are increased frequency of weather extremes, including heat waves with prolonged dry period, and increasing demand for growing maize grain year-round.
At CIMMYT, systematic breeding for HT maize was initiated under Heat Stress Tolerant Maize for Asia (HTMA), a project funded by the United States Agency for International Development (USAID) Feed the Future program. The project was launched in 2013 in a public–private alliance mode, in collaboration with public-sector maize research institutions and private seed companies in Bangladesh, Bhutan, India, Nepal, and Pakistan.
The project leveraged the germplasm base and technical expertise of CIMMYT in breeding for abiotic stress tolerance, coupled with the research capacity and expertise of the partners. An array of activities was undertaken, including genetic dissection of traits associated with heat stress tolerance, development of new HT maize germplasm and experimental hybrids, evaluation of the improved hybrids across target populations of environments using a heat stress phenotyping network in South Asia, selection of elite maize hybrids for deployment, and finally scaling via public–private partnerships.
Delivery of HT maize hybrids to smallholder farmers in South Asia
After extensive testing and simultaneous assessment of hybrid seed production and other traits for commercial viability, the selected hybrids were officially released or registered for commercialization. Impact assessment of HT maize hybrid seed was conducted in targeted areas in India and Nepal. Studies showed farmers who adopted the HT varieties experienced significant gains under less-favorable weather conditions compared to farmers who did not.
Under favorable conditions the yield was on par with those of other hybrids. It was also demonstrated that HT hybrids provide guaranteed minimum yield (approx. 1 t ha-1) under hot, dry unfavorable weather conditions. Adoption of new HT hybrids was comparatively high (19.5%) in women-headed households mainly because of the “stay-green” trait that provides green fodder in addition to grain yield, as women in these areas are largely responsible for arranging fodder for their livestock.
“Smallholder farmers who grow maize in stress vulnerable ecologies in the Tarai region of Nepal and Karnataka state in southern India expressed willingness to pay a premium price for HT hybrid seed compared to seed of other available hybrids in their areas,” said Atul Kulkarni, socioeconomist at CIMMYT in India.
Going forward–positioning and promoting the new hybrids are critical
A simulation study suggested that the use of HT varieties could reduce yield loss (relative to current maize varieties) by up to 36% and 93% by 2030 and by 33% and 86% by 2050 under irrigated and rainfed conditions respectively. CIMMYT’s work in South Asia demonstrates that combining high yields and heat-stress tolerance is difficult, but not impossible, if one adopts a systematic and targeted breeding strategy.
The present registration system in many countries does not adequately recognize the relevance of climate-resilience traits and the yield stability of new hybrids. With year-to-year variation in maize productivity due to weather extremes, yield stability is emerging as an important trait. It should become an integral parameter of the registration and release system.
Positioning and promoting new HT maize hybrids in climate-vulnerable agroecologies requires stronger public–private partnerships for increasing awareness, access, and affordability of HT maize seed to smallholder farmers. It is important to educate farming communities in climate-vulnerable regions that compared to normal hybrids the stress-resilient hybrids are superior under unfavorable conditions and at par with or even superior to the best commercial hybrids under favorable conditions.
For farmers to be able to easily access the new promising hybrids, intensive efforts are needed to develop and strengthen local seed production and value chains involving small-and medium-sized enterprises, farmers’ cooperatives, and public-sector seed enterprises. These combined efforts will lead to wider dissemination of climate-resilient crop varieties to smallholder farmers and ensure global food security.
Climate change poses a threat to yields and food security worldwide, with plant diseases as one of the main risks. An international team of researchers, surrounding professor Senthold Asseng from the Technical University of Munich (TUM), has now shown that further spread of the fungal disease wheat blast could reduce global wheat production by 13% until 2050. The result is dramatic for global food security.
With a global cultivation area of 222 million hectares and a harvest volume of 779 million tons, wheat is an essential food crop. Like all plant species, it is also struggling with diseases that are spreading more rapidly compared to a few years ago because of climate change. One of these is wheat blast. In warm and humid regions, the fungus magnaporthe oryzae has become a serious threat to wheat production since it was first observed in 1985. It initially spread from Brazil to neighboring countries. The first cases outside of South America occurred in Bangladesh in 2016 and in Zambia in 2018. Researchers from Germany, Mexico, Bangladesh, the United States, and Brazil have now modeled for the first time how wheat blast will spread in the future.
Wheat fields affected by wheat blast fungal disease in Passo Fundo, Rio Grande do Sul, Brazil. (Photo: Paulo Ernani Peres Ferreira)
Regionally up to 75% of total wheat acreage affected
According to the researchers, South America, southern Africa, and Asia will be the regions most affected by the future spread of the disease. Up to 75% of the area under wheat cultivation in Africa and South America could be at risk in the future. According to the predictions, wheat blast will also continue to spread in countries that were previously only slightly impacted, including Argentina, Zambia, and Bangladesh. The fungus is also penetrating countries that were previously untouched. These include Uruguay, Central America, the southeastern US, East Africa, India, and eastern Australia. According to the model, the risk is low in Europe and East Asia—with the exception of Italy, southern France, Spain, and the warm and humid regions of southeast China. Conversely, where climate change leads to drier conditions with more frequent periods of heat above 35 °C, the risk of wheat blast may also decrease. However, in these cases, heat stress decreases the yield potential.
Wheat fields affected by wheat blast fungal disease in Passo Fundo, Rio Grande do Sul, Brazil. (Photo: Paulo Ernani Peres Ferreira)
Dramatic yield losses call for adapted management
The affected regions are among the areas most severely impacted by the direct consequences of climate change. Food insecurity is already a significant challenge in these areas and the demand for wheat continues to rise, especially in urban areas. In many regions, farmers will have to switch to more robust crops to avoid crop failures and financial losses. In the midwest of Brazil, for example, wheat is increasingly being replaced by maize. Another important strategy against future yield losses is breeding resistant wheat varieties. CIMMYT in collaboration with NARs partners have released several wheat blast-resistant varieties which have been helpful in mitigating the effect of wheat blast. With the right sowing date, wheat blast-promoting conditions can be avoided during the ear emergence phase. Combined with other measures, this has proven to be successful. In more specific terms, this means avoiding early sowing in central Brazil and late sowing in Bangladesh.
First study on yield losses due to wheat blast
Previous studies on yield changes due to climate change mainly considered the direct effects of climate change such as rising temperatures, changing precipitation patterns, and increased CO2 emissions in the atmosphere. Studies on fungal diseases have so far ignored wheat blast. For their study, the researchers focused on the influence of wheat blast on production by combining a simulation model for wheat growth and yield with a newly developed wheat blast model. Environmental conditions such as the weather are thus included in the calculations, as is data on plant growth. In this way, the scientists are modeling the disease pressure in the particularly sensitive phase when the ear matures. The study focused on the influence of wheat blast on production. Other consequences of climate change could further reduce yields.
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With the ever-changing climate conditions, including the unpredictable El Niño, and dynamic changes in government policies, understanding farmers’ preferences and market segmentation has become crucial for implementing impactful breeding programs. Market segmentation is a strategic process which divides a market into distinct group of consumers with similar needs, preferences, and behaviors. This allows organizations to tailor their products and services to specific customer segments, thus ensuring maximum value and impact.
In today’s fast-paced and evolving agricultural landscape, market segmentation plays a vital role in helping organizations navigate the complexities of a dynamic market. CIMMYT’s maize breeding program has a successful track record in developing and delivering improved varieties that are climate-resilient, high-yielding and suited to the rainfed tropical conditions in Africa. To further strengthen the impact, it is important to have a clear understanding of the evolving needs of farmers in different agroecological regions and the emerging market scenario so that breeding processes can be tailored based on market needs and client requirements.
Questions arise on how to refine the breeding programs relative to country-specific market segments, what efforts are underway to target these markets, and how do these markets transition. Recognizing the importance of market segmentation in refining breeding programs at the country and regional levels, CIMMYT hosted two workshops on maize market intelligence in Kenya and Zimbabwe, under the CGIAR Market Intelligence Initiative for eastern and southern Africa.
“Market intelligence in breeding programs is critical to understand the evolving needs of key stakeholders, including farmers, consumers, and the seed industry. It helps continuously improve the breeding pipelines to develop and deliver impactful products in targeted market segments. The workshops brought together relevant experts from the national programs and seed companies for focused discussions to develop a harmonized breeding strategy. This would help to address the needs of smallholder maize farmers in eastern and southern Africa,” said Director of CIMMYT’s Global Maize program and One CGIAR Global Maize Breeding Lead, B.M. Prasanna.
B.M. Prasanna delivers a presentation. (Photo: CIMMYT)
The workshops constituted a strategic continuation of the Product Design Team (PDT) meetings under CGIAR Market Intelligence, with a focus on the refinement of gender-intentional target product profile design. Guided by the expertise of CIMMYT’s Global Maize program, Market Intelligence, and ABI-Maize Transform teams, the sessions saw active participation from key stakeholders including lead breeders, seed systems experts, and market specialists from the National Agricultural Research and Extension Systems (NARES), alongside collaborative engagement with seed company partners. The workshops underscored the commitment to incorporate diverse perspectives, aligning with the evolving maize market landscape in eastern and southern Africa.
“The workshop provided critical insights on opportunities to improve market penetration of improved maize varieties. There is a need to strike a balance between the needs of the farmers, seed industry, and consumers in variety development; actively involve farmers and consumers in variety selection and understanding their preferences; and focus on emerging needs of the market such as yellow maize for feed and food,” said James Karanja, maize breeding lead at the Kenya Agriculture & Livestock Research Organization, Kenya.
Insights from both workshops underscored the importance of providing breeders with pertinent information and comprehensive training. The discussions illustrated the necessity for breeders to define their objectives with a 360-degree outlook, aligning breeding programs with market segments and interfacing with CIMMYT’s regional vision.
Workshop participants. (Photo: CIMMYT)
“The market intelligence workshop is an excellent initiative for the breeding programs. It shows how traits can be identified and prioritized, based on farmers’ requirements. The maize value chain is broad, and the synergy between the developer of the product (breeder), the producer (farmer), and the consumer needs to be effective. Hence, streamlining of the market segments and eventually the target product profiles is key in ensuring that the breeders develop improved products/varieties with relevant traits that address the needs of farmers, consumers, and the seed industry,” said Lubasi Sinyinda, breeder from the Zambia Agricultural Research Institute, Zambia.
Another participant, Lucia Ndlala, a maize breeder at the Agricultural Research Council, South Africa, echoed similar enthusiasm. “The workshop was exceptionally informative, providing valuable insights into target product profiles and market segments. This knowledge will undoubtedly prove instrumental in shaping future breeding strategies,” she said.
When applied through a breeding lens, market segmentation is a vital tool in refining breeding programs at both country and regional levels, enabling breeders to better understand and address the diverse needs of the farmers, and ensuring that the improved varieties are tailored to market segments.
Dr. Ravi Prakash Singh, associated with CIMMYT, is awarded the Padma Shri. He’s recognized for his global impact in agricultural science, notably developing over 730 climate-resilient, high-yield wheat varieties, benefiting small-holder farmers.
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Delivery of HT maize hybrids to smallholder farmers in South Asia 
