CGIAR delegation arrives at the Joint Laboratory. (Photo: CIMMYT)
Several experts from across CGIAR, including Sonja Vermeulen, managing director of Genetic Innovation, Hugo Campos, CIP deputy director, Sarah Hearne, CIMMYT Genetic Resources program director a.i., and Charlotte Lusty, Genetic Innovation senior director gene banks, the Alliance Bioversity-CIAT, visited the Minister of Agriculture and Rural Affairs MARA-CIMMYT Joint Laboratory on 25-26 January 2024.
The MARA-CIMMYT Joint Laboratory, hosted by Chinese Academy of Agricultural Sciences (CAAS), is a global leader in Chinese wheat quality and molecular development and application and plays a significant role in variety development, serving as an entry point for international collaboration.
The visit follows a China visit from CIMMYTâs Director General Bram Govaerts. “We remain committed to strengthening collaboration ties by continuing wheat and maize germplasm introduction, and climate change adaptation and carbon sequestration, two key issues we discussed, bearing in mind that our partnership with China is mutually beneficial and contributes to the world’s food security,â said Govaerts.
âThe partnership between the Ministry of Agriculture and Rural Affairs and CIMMYT sets the standard for collaboration among CGIAR organizations and government ministries,â said Vermeulen. âAnd the timely and effective facilitation of the CAAS is a key part of this ventureâs success.â
CGIAR delegation stands with Zhonghu He. (Photo: CIMMYT)
CIMMYT Distinguished Scientist and the Country Representative for China, Zhonghu He, presented the history and achievement of the China-CIMMYT partnership.
âCIMMYT maize varieties have been planted on more than 1 million hectares across China and three thousand new inbred lines were introduced to broaden the genetic base of Chinese maize germplasm,â said He. âThe MARA-CIMMYT partnership has released thirteen commercial maize varieties in Nepal and elsewhere.â
The delegation received a first-hand look at noodle quality evaluation and gave high recommendation to the wheat variety Zhongmai 578, derived from CIMMYT germplasm with high-yield potential and excellent pan bread and noodle qualities. It is planted on half a million hectares across China, with a yield of six-thousand tons, leading to both improving farmer income and enhancing the competitiveness of the food industry in China.
The experimental research station in Toluca, Mexico. (Photo: S. Herrera/CIMMYT)
In the ever-evolving field of agriculture, AGG-WHEAT is leading a transformative approach through rapid marker-selectable trait introgression in wheat breeding programs. This method aims to streamline the process of integrating desirable traits into various genetic backgrounds.
At the core of AGG-WHEAT’s strategy is the establishment of a centralized marker-selectable trait introgression pipeline. This initiative seeks to facilitate the transfer of specific genes from a centralized source into various genetic backgrounds within plant breeding programs. Molecular markers play a crucial role in efficiently identifying and selecting target traits.
The merits of a centralized trait introgression pipeline extend beyond convenience. This approach ensures a more uniform and controlled transfer of genetic material, enhancing the precision of trait introgressions across diverse breeding lines. Molecular markers streamline the selection process, improving the accuracy of desired trait incorporation into wheat varieties.
Speed breeding facilities in Toluca, Mexico
AGG-WHEAT’s marker-selectable trait introgression pipelines are implemented at the speed breeding facilities located at the CIMMYT research station in Toluca, Mexico. These facilities serve as the incubators for innovation, where new selection candidates are evaluated based on various criteria. The decision-making process involves an expert panel comprising geneticists, trait specialists, and breeders. This panel annually determines the selection candidates, considering factors such as trait demand, genetic diversity, evidence of Quantitative Trait Loci (QTL) effects, selection efficiency, and available funding.
The decision-making process involves a multifaceted evaluation of potential selection candidates. Documented trait pipelines and product profiles guide decision-making to ensure alignment with the overarching goals of wheat breeding programs. Considerations include the need for phenotypic variation and the existence of limited genetic diversity for the trait under consideration.
The decision-making process also explores existing in-house or external evidence of QTL effects and the underlying gene mechanisms. Selection efficiency, contingent on the availability of accurate molecular markers and a known purified donor parent, further refines the pool of potential candidates. Established phenotypic protocols for product testing and the crucial element of available funding complete the decision-making criteria.
Achievements
In a significant step towards innovation, the products of the first marker-selectable trait introgression pipelines entered yield trials in 2023. This marks a transition from conceptualization to tangible impact, reflecting the efficacy of AGG-WHEAT’s approach. A total of 97 F5-lines, cultivated through the marker-assisted backcross (MABC) scheme, now grace the fields.
These lines carry novel genes associated with fusarium head blight and rust resistance, derived from wheat genetic resources and wild relatives. The choice of these traits underscores AGG-WHEAT’s commitment to addressing challenges faced by wheat crops, ensuring improved resilience and sustainability in the face of evolving environmental conditions.
The success of these initial trait introgression pipelines represents more than a scientific achievement; it marks a pivotal moment in the trajectory of wheat breeding. The 97 F5-lines, standing as testaments to enhanced resistance traits, are poised to make a transition into mainstream breeding pipelines. This marks the commencement of a broader dissemination strategy, where these lines will be distributed for testing at National Agricultural Research and Extension Services (NARES).
The journey from the experimental fields to mainstream adoption involves a meticulous process. These lines, having undergone rigorous evaluation and selection, now hold the potential to catalyze changes in commercial wheat varieties. The lessons learned from their cultivation will shape future breeding strategies and contribute to the resilience of wheat crops in diverse agricultural landscapes.
Rapid marker table. (Photo: CIMMYT)
AGG-WHEAT’s lasting impact
AGG-WHEAT’s marker-selectable trait introgression stands as an innovative approach in wheat breeding. The centralized approach, the strategic use of molecular markers, and the meticulous decision-making process exemplify the commitment to excellence and precision. The journey from concept to realityâmarked by the entry of 97 F5-lines into yield trialsâsignals a new era in wheat breeding.
As these lines traverse from experimental fields to mainstream adoption, they carry the promise of transforming the landscape of commercial wheat varieties. AGG-WHEAT’s lasting impact goes beyond the scientific realm; it extends to the fields where farmers strive for sustainable and resilient wheat crops. In the tapestry of agricultural progress, AGG-WHEAT has woven a thread of innovation that holds the potential to redefine the future of wheat cultivation.
Healthy wheat and wheat affected by Ug99 stem rust in farmer’s field, Kenya. (Photo: CIMMYT)
The East African wheat breeding pipeline aims to improve wheat varieties and contribute to regional food security by ensuring a stable and resilient wheat supply. In 2022, CIMMYT, in partnership with the Kenya Agriculture and Livestock Research Organization (KALRO) established a Joint Breeding Program in Njoro, a town southwest of the Rift Valley in Kenya. This was one of the first integrated breeding pipelines between CGIAR and National Agricultural Research and Extension Systems (NARES) partners.
Over the last three decades, genetic trials of over 77 varieties have been conducted in several regions. In East Africa, an expanded testing network that spans over multiple research institutes in Kenya and Ethiopia has been established for Stage 1 and Stage 2 trials in network countries. This makes the pipeline a powerful driver of positive impacts, rapidly enhancing both farm productivity and production in target regions. In Kenya specifically, a genetic gain trial was conducted at two sites in 2023 with the Stage 1 trials evaluated across eight locations. These are being distributed to NARES partners to establish correlations between the breeding site in Kenya and the Target Population of Environments (TPEs) in the E&SSA regions. This breeding pipeline demarcates the population improvement from product development. Other areas in the trials include the enhancement of genetic diversity to build resilience, adaptability, and quality enhancement to meet market and consumer demands.
The trial will continue in 2024 and 2025 to establish a baseline for genetic gains and to enable the assessment of the breeding pipeline’s progress in the coming years. The first cohort of pipeline materials (250 crosses) has been advanced to F2 generation and will be ready for distribution to E&SSA partners in 2025.
Accelerated breeding
The anticipation is that accelerated breeding techniques will be implemented in Kenya by incorporating a three-year rapid generation bulk advancement (RGBA) scheme aimed at diminishing the time necessary for variety development and release. This collaborative effort encompasses various activities, including joint crossing block, generation advancement, yield testing, and population improvement. The three-year RGBA scheme, coupled with data-driven selection utilizing advanced data analytics (GEBV, SI) and genomic selection approaches, is expected to play a pivotal role in facilitating informed breeding decisions in the East African region.
3-year RGBA scheme. (Photo: Sridhar Bhavani)
Varietal improvement
The project aims to develop and release improved wheat varieties that are well adapted to the East African agroecological conditions. The Kenyan environment closely mirrors wheat-growing conditions in Ethiopia, Tanzania, Uganda, Rwanda, and Burundi, and spillover impacts to sub-Saharan countries such as Zambia and Zimbabwe. This strategic alignment with local conditions and close cooperation with NARES partner organizations has proven to be very effective in addressing critical gaps, including high-yield potential, disease resistance, and climate resilience, and aligns with CIMMYTâs overall wheat strategy for Africa.
Enhanced disease resistance
Kenya stands out as a hotspot for rust diseases, showcasing notable diversity in stem rust variants (ug99) and yellow rust. The virulence spectrums of these diseases differ from those found in Mexico, posing challenges to effective breeding strategies. It is expected that the breeding pipeline will effectively tackle these challenges as well as those associated with fusarium, Septoria, and wheat blast, which are on the rise in African environments.
Climate adaptation
The East African wheat breeding pipeline is committed to breeding wheat varieties that can thrive in changing climatic conditions, including heat and drought tolerance, and expanding testing in marginal rainfed environments experiencing heat and drought stress.
Through the support of our partners and funders from the Bill and Melinda Gates Foundation, Foundation for Food and Agriculture Research (FFAR), and Foreign, Commonwealth and Development Office FCDO, the following achievements can be reported:
Regional collaboration and cooperation
For over four decades, the enduring collaboration with KALRO has yielded significant successes including the operation of the largest phenotyping platform for stem rust and various diseases. The Mexico-Kenya shuttle breeding program, incorporating Ug99 resistance, has successfully countered the threat of stem rust by releasing over 200 varieties in targeted regions and advancing the East African wheat breeding pipeline. The plan is to replicate these accomplishments in other target regions through the E&SSA network. To address limitations in KALRO’s breeding program and to conduct standardized trials, a strategic partnership with a private seed company Agventure Cereal Growers Association has been established. This collaboration will facilitate yield testing at multiple sites in Kenya to identify lines with superior performance for the East African region. So far, lines exhibiting high yield potential of up to 8 tons/ha, even under rain-fed environments, have been identified. The collaborative efforts are already making a noticeable impact, as evidenced by reports indicating increased adoption of zero-tillage practices among farmers. This shift has proven beneficial, especially during years marked by heat and drought challenges, resulting in higher returns for these farmers.
Increased capacity of national programs
From 1-13 October 2023, the AGGMW project held a training program on “Enhancing Wheat Disease Early Warning Systems, Germplasm Evaluation, Selection, and Tools for Improving Wheat Breeding Pipelines”. The course which brought together 33 participants from over 13 countries was held at the KALRO station in Njoro- Kenya. The comprehensive program covered a wide range of crucial subjects in the field of wheat breeding and research. Topics included breeding methodologies, experimental design, data collection, statistical analysis, and advanced techniques such as genomic selection. Participants also engaged in practical hands-on data analysis, explored rust pathology, and delved into early warning systems. Moreover, they had the opportunity for direct evaluation and selection of breeding materials. The course aimed to equip participants with a diverse skill set and knowledge base to enhance their contributions to the field of wheat breeding and research.
Other initiatives supporting the breeding pipeline include CGIAR programs, Accelerated Breeding and Crops to End Hunger. This multi-faceted approach within the breeding pipeline underpins the importance of fostering regional collaboration, knowledge sharing, and strategic investments in enhancing wheat production and addressing critical challenges in the region.
In the dynamic landscape of wheat breeding, early access to germplasm emerges as a strategic catalyst for accelerating variety turnover and meeting the evolving challenges faced by farmers in South Asia. Since its inception, the Accelerating Genetic Gains in Maize and Wheat (AGG) project has pioneered new tools to optimize the wheat breeding process. One such tool, the efficient and low-cost 3-year breeding cycle, has been fine-tuned in Mexico, using the Toluca screenhouse and field advancement in ObregĂłn, laying the groundwork for faster variety turnover.
The inaugural set of lines generated through this enhanced breeding cycle is already undergoing Stage 1 trials in the ObregĂłn 2023-24 season. However, the innovation doesn’t stop there; to expedite the variety release process and garner robust data from the Target Population of Environments (TPE), Stage 2 lines are being rigorously tested at over 20 sites in South Asia through collaboration with National Agricultural Research and Extension Services (NARES) partners. In the seasons spanning 2021-2024, a total of 918 Stage 2 lines underwent rigorous trials, aiming to provide early access to improved wheat lines for testing and release by NARES and establish a genetic correlation matrix between ObregĂłn selection environments and diverse sites across South Asia.
These extensive trials serve a dual purpose. Firstly, they facilitate early access to improved wheat lines for testing and release by NARES, bolstering the agricultural landscape with resilient and high-yielding varieties. Secondly, they contribute to the establishment of a genetic correlation matrix between the selection environments in ObregĂłn and the diverse sites across South Asia. This matrix becomes a guiding compass, aiding in selecting the most promising lines for broader TPEs in South Asia and beyond.
Transformative impact on wheat varieties in South Asia
Through the support of our partners and funders from the Bill & Melinda Gates Foundation, the Foundation for Food and Agriculture Research (FFAR), the UK Foreign, Commonwealth & Development Office (FCDO), and the US Agency for International Development (USAID), great achievements have been recorded throughout the region. India, a prominent player in wheat cultivation, stands as a testament to the transformative impact of early access to advanced lines. The top three varieties, namely DBW187, DBW303, and DBW 222, covering over 6 million hectares, trace their roots to CIMMYT varieties. Adopting a fast-track approach through early-stage testing of these advanced lines at BISA sites in India, supported by the Delivering Genetic Gain in Wheat (DGGW) project, facilitated the release of these varieties two years ahead of the regular testing process. This expedited varietal release was complemented by the innovative early seed multiplication and dissemination approach introduced by the Indian Council of Agricultural Research (ICAR). Recent additions to this accelerated channel include varieties such as DBW 327, DBW 332, DBW 370, and 371, promising further advancements in wheat cultivation.
Pakistan
In Pakistan, the early access to advanced lines has been a catalyst for releasing high-yielding, climate-resilient, and nutritious wheat varieties. In 2023 alone, 12 new varieties were released, with the renowned ‘Akbar-19,’ introduced in 2019, covering a substantial 42% of cultivated land in Punjab. Data released by the Ayub Agricultural Research Institute (AARI), shows that this variety, known for its high yield potential, disease resistance, and enriched zinc content, has significantly contributed to increased wheat production in the region.
Nepal
Guided by policy interventions in the national varietal testing process, Nepal has experienced the fast-track commercialization of high-yielding and climate-resilient wheat varieties. Allowing multilocation testing of CIMMYT nurseries and advanced elite lines, Nepal released six biofortified zinc wheat varieties in 2020. The expeditious seed multiplication of these released and pre-release varieties has facilitated the rapid spread of new and improved wheat varieties.
The strategic utilization of early access to wheat germplasm in South Asia holds promise in accelerating variety turnover, offering farmers resilient and high-performing wheat varieties. Collaborative efforts between research institutions, government bodies, and international organizations exemplify the power of innovation in transforming agriculture. With an ongoing dedication to refining breeding cycles, expanding testing initiatives, and fostering collaboration, the AGG project contributes to building a sustainable and resilient agricultural future in South Asia. Early access to wheat germplasm emerges as a practical approach in this scientific endeavor, laying the foundation for a climate-resilient and food-secure region. The successes witnessed in India, Pakistan, and Nepal underscore the transformative potential of this approach, offering tangible benefits for agricultural communities in South Asia and beyond. In navigating the complexities of a changing climate and growing food demand, early access to wheat germplasm remains a pragmatic ally, propelling agricultural innovation and resilience to new heights.
Tang Renjian, former governor of Gansu province, China, and current Minister of Agriculture and Rural Affairs and CIMMYT Director General, Bram Govaerts. (Photo: CIMMYT)
The Minister of Agriculture and Rural Affairs for China, Tang Renjian, visited CIMMYT headquarters on Thursday, 11 January, along with dignitaries from the Ministry of Agriculture and Rural Affairs (MARA) and the Embassy of China. Tang, the former governor of Gansu province in China, attended the site with the aim of building on collaborative scientific work between his country and CIMMYT through the Joint Laboratory for Maize and Wheat Improvement in China.
CIMMYT was delighted to host Tang to showcase the benefits of the CIMMYT-China relationship for wheat and maize, and to identify opportunities for sustained collaboration. The highly regarded minister was able to hear about work including genetic analysis service for agriculture and methods to close the gap between farmers and research, as well as to observe CIMMYTâs facilities and field experiments. The meeting laid the foundations for potential future CIMMYT-China projects in areas such as germplasm exchange, molecular breeding, climate-resilient technology, and training.
Bram Govaerts, director general of CIMMYT, said, âShowcasing our science to Tang is an exciting chance for CIMMYT and China to grow what is already a fruitful partnership, impacting millions of people globally.â
Exemplifying impactful global partnerships
Since 1974, the CIMMYT-China relationship has improved the lives of millions of people via numerous evidence-based scientific projects, with support from the Chinese Academy for Agricultural Sciences (CAAS). Through five decades of partnership, the collaboration has resulted in up to 10.7 million additional tons of wheat for Chinaâs national output with a value of US $3.4 million.
CIMMYTâs contribution to Chinaâs wheat and maize is significant. In terms of wheat, 26% of wheat grown in China has been derived from CIMMYT germplasm since the year 2000, with Chinese scientists adding more than 1,000 accessions to the CIMMYT gene bank. CIMMYT maize varieties have been planted on more than 1 million hectares in China, with the partnership responsible for the release of 13 commercial varieties.
Renjian and Chinese dignitaries tour CIMMYTâs museum. (Photo: CIMMYT)
More recently, scientists have played an important role in the free exchange of germplasm between China and countries in Africa, which will help to mitigate against any gene pool loss caused by climate-induced extreme weather events and enable the development of more resilient crop varieties.
Tang said, âWitnessing first-hand the work of CIMMYTâs scientists in Mexico is inspiring. We look forward to exploring further how we can build on the excellent relationship between China and CIMMYT to address global agricultural challenges.â
Govaerts said, âWe hope that this partnership continues in order to address the need for nutritious crops and to develop innovative solutions for smallholder farmers.â
Written by mcallejas on . Posted in Uncategorized.
Dragan Milic is responsible for providing support to the National Agriculture Research Systems (NARS) in Africa, assisting them in the development of breeding improvement plans aimed at delivering increased genetic gains for smallholder farmers. These enhancement strategies will specifically target product profiles, optimization of breeding schemes, utilization of genotyping, automation, mechanization, appropriate breeding software, and establishment of connections with seed producers.
MiliÄ also extends support to national breeding teams in African countries, implementing a comprehensive internal breeding pipeline optimization plan supported by the Excellence in Breeding platform. Furthermore, he assists national partners in integrating and establishing breeding networks with CGIAR institutes and regional and national collaborators.
Before joining CIMMYT, Dragan MiliÄ spent his professional career at the Institute of Field and Vegetable Crops (IFVCNS) in Novi Sad, Serbia. He served as the Head of the Forage Breeding team at IFVCNS and possesses over 20 years of experience in breeding, seed production, and leadership in conventional and molecular alfalfa/forage breeding. Dragan MiliÄ has been a visiting scientist at the Samuel Roberts Noble Foundation and UC Davis through different scholarships funded by the Serbian and US governments.
His main expertise is related to forage and grain legumes breeding, field-based experiment phenotyping, legume genetics, and forage and grain legumes seed systems. He was involved in defining strategies based on conventional and molecular breeding efforts towards variety selection and the development of improved forage/alfalfa germplasm for Southern East Europe and Asia. Dragan is the author of many alfalfa/grain legumes varieties released in Serbia, Belarus, Morocco, Turkey, Ukraine, and the EU.
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 agricultureâs 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 agricultureâdiverse 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 CIMMYTâs contribution to COP 28, Bram Govaerts, CIMMYTâs 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.
âOur 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,â 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 tomorrowâs climatic and environmental conditions.
âOur 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,â 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,â 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.
âDrought-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,â 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: Â conservation agriculture, cropping system diversification and site-specific nutrient management and their impact on food production, climate change adaptation and mitigation.
âAs the science continues to develop, we need to harness digital capacity to co-create sustainable solutions alongside local, indigenous knowledge,â said Sapkota. âWhile 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.â
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.
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. âSouth 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,â 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. âIf current trends persist until 2050, major food yields and food production capacity of South Asia will decrease significantlyâby 17 percent for maizeâdue to climate change-induced heat and water stress,â explained Zaidi.
From breeding to improved seed deliveryâthe 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 12â15 years, heat stress tolerance has emerged as one of the key traits for CIMMYTâs 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 publicâprivate 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 publicâprivate 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 âstay-greenâ trait that provides green fodder in addition to grain yield, as women in these areas are largely responsible for arranging fodder for their livestock.
âSmallholder 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,â said Atul Kulkarni, socioeconomist at CIMMYT in India.
Going forwardâpositioning 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. CIMMYTâs 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 publicâprivate 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, farmersâ 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.
Maize grain heavily damaged by the larger grain borer and maize weevil. (Photo: Jessica GonzĂĄlez/CIMMYT)
According to the World Health Organization (WHO), 10% of the global population suffers from food poisoning each year. Aflatoxins, the main contributor to food poisoning around the world, contaminate cereals and nuts and humans, especially vulnerable groups like the young, elderly, or immune-compromised, and animals are susceptible to their toxic and potentially carcinogenic effects.
Fungi contamination occurs all along the production cycle, during and after harvest, so the mitigation of the mycotoxins challenge requires the use of an integrated approach, including the selection of farmer-preferred tolerant varieties, implementing good agricultural practices such as crop rotation or nitrogen management, reducing crop stress, managing pests and diseases, biological control of mycotoxigenic strains, and good post-harvest practices.
Monitoring of mycotoxins in food crops is important to identify places and sources of infestations as well as implementing effective agricultural practices and other corrective measures that can prevent outbreaks.
A bug problem
Insects can directly or indirectly contribute to the spread of fungi and the subsequent production of mycotoxins. Many insects associated with maize plants before and after harvest act as a vector by carrying fungal spores from one location to another.
International collaboration is key to managing the risks associated with the spread of invasive pests and preventing crop damage caused by the newly introduced pests. CIMMYT, through CGIARâs Plant Health initiative, partners with the Center for Grain and Animal Health Research of the US Department of Agriculture (USDA) and Kansas State University are investigating the microbes associated with the maize weevil and the larger grain borer.
The experiment consisted of trapping insects in three different habitats, a prairie near CIMMYT facilities in El BatĂĄn, Texcoco, Mexico, a maize field, and a maize store at CIMMYTâs experimental station at El BatĂĄn, using Lindgren funnel traps and pheromones lures.
Hanging of the Lindgren funnel traps in a prairie near El BĂĄtan, Texcoco, Mexico. (Photo: Jessica GonzĂĄlez/CIMMYT)
Preliminary results of this study were presented by Hannah Quellhorst from the Department of Entomology at Kansas State University during an online seminar hosted by CIMMYT.
The collected insect samples were cultured in agar to identify the microbial community associated with them. Two invasive pests, the larger grain bore and the maize weevil, a potent carcinogenic mycotoxin was identified and associated with the larger grain borer and the maize weevil.
The larger grain borer is an invasive pest, which can cause extensive damage and even bore through packaging materials, including plastics. It is native to Mexico and Central America but was introduced in Africa and has spread to tropical and subtropical regions around the world. Together with the maize weevil, post-harvest losses of up to 60% have been recorded in Mexico from these pests.
âWith climate change and global warming, there are risks of these pests shifting their habitats to areas where they are not currently present like sub-Saharan Africa and North Africa,â said Quelhorst. âHowever, the monitoring of the movement of these pests at an international level is lacking and the microbial communities moving with these post-harvest insects are not well investigated.â
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Marcelo is an experienced graphic designer with over 20 years of graphic design experience for CIMMYT headquarters in Mexico. His main responsibilities include branding development, branding, design, and production of corporate reports and project reports. Developing designs for scientific articles, papers, abstracts, and serving as a liaison with the various vendors that provide a service for communications.
CIMMYT applies high quality science to develop more resilient agrifood systems. This year three scientists from CIMMYT are included in Clarivateâs 2023 Analysis of the most highly cited academic papers.
While CIMMYTâs mission does explicitly require academic publication from its scientists, âthe recognition reflects extensive networking with academia, opening doors for new technologies to benefit resource-poor farmers and consumers as well as lending scientific kudos to CIMMYT and underpinning fundraising efforts,â says Distinguished Scientist and Head of Wheat Physiology, Matthew Reynolds.
Maize Physiologist Jill Cairns and collaborators spearheaded the application of high throughput phenotyping for maize-breeding in sub-Saharan Africa, which she says, âwould not have been possible without involving leading academic experts like JL Araus at Barcelona University.â
Reynolds has built initiatives like the Heat and Drought Wheat Improvement Consortium (HeDWIC) and the International Wheat Yield Partnership (IWYP) that transfer cutting-edge technologiesâfrom many of the best academic institutions in the worldâto application in breeding, helping to widen wheat gene pools globally.
All three scientists achieved the same recognition last year. As in 2022, Reynolds was awarded for his contribution to scientific literature in plant and animal sciences, while Cairns and Crossa were awarded for their contributions to scientific literature across several fields of research (cross fields).
Since 2001, Clarivateâs Highly Cited Researchers list has identified global research scientists and social scientists who have demonstrated significant and broad influence in their field(s) of research. It recognizes exceptional research performance demonstrated by the production of multiple papers that rank in the top 1% by citations for field and year, according to the Web of Science citation indexing service.
In 2023, the list recognizes 6,849 individuals from more than 1,300 institutions across 67 countries and regions.
Certified soyabean seed from Afriseed. (Photo: AFRI archives)
In Zambia, smallholder farmers obtain their seed from a variety of sources. Over 75 percent of farmers in Zambia have adopted certified maize seed and about 30 percent in southern Africa, overall. The private sector has been instrumental in creating demand for certified and timely delivery of seed to remote areas, and the Government of Zambiaâs Farmer Input Support Programme (FISP) has largely contributed to better accessibility to certified seed for farmers. In 2022â2023, of the three million registered smallholder farmers in Zambia, more than one million accessed certified seed through FISP.
Afriseed is a seed company in Zambia that has been gaining ground in local seed markets. It has emerged as a catalyst for helping smallholder farmers transition to new, high-yielding legume varieties. Afriseed provides solutions to help smallholders increase their agricultural productivity with improved seed varieties of cereals and legumes and assist them with technology transfer. The company aims to increase the food security and incomes of Zambiaâs smallholder farming community, which accounts for 90 percent of agricultural output in the country. During the 2022â2023 farming season, a critical turning point was reached when Afriseed became a partner in the Southern Africa Accelerated Innovation Delivery Initiative (AID-I) Rapid Delivery Hub, or MasAgro Africa, a two-year project under CIMMYT, with the aim of scaling-up production of certified seed varieties of soybean and common bean.
Under the partnership, Afriseed promotes the cultivation of improved legume seed through a smallholder farmer seed multiplication approach. By engaging with practicing smallholder farmers and signing grower contracts, basic seeds are multiplied into certified seed for soybean and common bean. Certified seed is a known variety produced under strict seed certification standards to support varietal purity. In collaboration with the Seed Control and Certification Institute (SCCI), the countryâs national seed authority, contracted farmers received training on climate-smart agricultural techniques and seed production guidelines. Through extension services to seed growers, smallholder farmers can adhere to the seed production guidelines set out in the National Seed Act to ensure the quality of certified seed produced.
Smallholder farmers hold improved, certified seed. (Photo: AFRI archives)
Afriseed has invested more than USD 335,000 toward supporting the production, aggregation, and processing of 317 t of certified climate-smart legume seedsâ265 metric tonnes (MT) for soybean and 52 MT for common bean. Data have shown that the seeds were aggregated from 313 smallholder seed growers, 40 percent of whom were women, in Zambiaâs Eastern Muchinga, Copperbelt and the Northern provinces. Seed aggregation improves access to quality seed varieties, increases crop yields and incomes, enhances integration into value chains, and creates market links for smallholder farmers.
Notable progress has been made with the contracted farmers, who have applied improved crop management practices and technologies on more than 600 ha of land to produce the seed. With this encouraging progress, Afriseed intends to scale up its last-mile seed distribution strategy to reach and directly help an estimated 35,000 underserved rural smallholder farming households with improved legume seeds in the 2023â2024 cropping season.
AID-I is one of the ways in which Feed the Future, the U.S. Governmentâs global food security and hunger initiative led by USAID, is taking immediate action to help cushion the blow of high fuel and fertilizer prices on farmers. One of the projectâs initial actions is to strengthen local seed systems so that agribusinesses can reach smallholder farmers with a diversity of improved seeds varieties, including climate-resilient and more nutritious varieties for maize and legumes.
CIMMYT and ICBA sign a memorandum of understanding. (Photo: ICBA)
Dubai/Mexico City, 10 January 2024 â An award-winning not-for-profit agricultural research center recognized for its work on sustainable agriculture in the Middle East and North Africa is joining forces with the global organization whose breeding research has contributed to half the maize and wheat varieties grown in low- and middle-income countries.
The International Center for Biosaline Agriculture (ICBA) and CIMMYT have signed an agreement to jointly advance the ecological and sustainable intensification of cereal and legume cropping systems in semi-arid and dryland areas.
âFarmers in such settings confront enormous risks and variable conditions and often struggle to eke out a livelihood, but they still comprise a critical part of the global food system and their importance and challenges are mounting under climate change,â said Bram Govaerts, director general of CIMMYT. âICBA brings enormously valuable expertise and partnerships to efforts that will help them.â
The specifics of the two centersâ joint work are yet to be defined but will cover soil health, salinity management approaches, crop productivity and breeding, gender-transformative capacity development, and finding markets for underutilized crops, among other vital topics.
Established in 1999 and headquartered in the United Arab Emirates (UAE), ICBA conducts research and development to increase agricultural productivity, improve food security and nutrition, and enhance the livelihoods of rural farming communities in marginal areas. The center has extensive experience in developing solutions to the problems of salinity, water scarcity and drought, and maintains one of the worldâs largest collections of germplasm of drought-, heat- and salt-tolerant plant species.
âWe are excited about the synergies our partnership with CIMMYT will create. It will focus on a range of areas, but the priority will be given to developing breeding and cropping system innovations to improve farmersâ food security and nutrition, while enhancing water security and environmental sustainability, and creating jobs and livelihoods in different parts of the world,â said Tarifa Alzaabi, director general of ICBA.
Based in Mexico but with projects in over 80 countries and offices throughout Africa, Asia and Latin America, CIMMYT operates a global seed distribution network that provides 80% of the worldâs breeding lines for maize and wheat, including many that offer superior yields and resilience in dry conditions and in the presence of crop diseases and pests.
The center is also conducting breeding and seed system development for dryland crops such as sorghum, millet, groundnut, cowpea, and beans, known for their climate resilience and importance as foods and sources of income for smallholder farm households and their communities.
With global and local partners, CIMMYT is also refining and spreading a suite of resource-conserving, climate-smart innovations for highly diverse maize- and wheat-based cropping systems, including more precise and efficient use of water and fertilizer, as well as conservation agriculture, which blends reduced or zero-tillage, use of crop residues or mulches as soil covers, and more diverse intercrops and rotations.
As part of the new agreement, the centers will also explore research collaborations with universities and research institutions in the UAE to develop and test maize varieties that are suitable for the UAEâs climate and soil conditions, as well as organizing training programs and workshops for farmers, extension workers, and other stakeholders in the UAE to build their capacity in maize production and management.
About ICBA
The International Center for Biosaline Agriculture (ICBA) is a unique applied agricultural research center in the world with a focus on marginal areas where an estimated 1.7 billion people live. It identifies, tests, and introduces resource-efficient, climate-smart crops and technologies that are best suited to different regions affected by salinity, water scarcity, and drought. Through its work, ICBA helps to improve food security and livelihoods for some of the poorest rural communities around the world.
CIMMYT is a cutting edge, non-profit, international organization dedicated to solving tomorrowâs problems today. It is entrusted with fostering improved quantity, quality, and dependability of production systems and basic cereals such as maize, wheat, triticale, sorghum, millets, and associated crops through applied agricultural science, particularly in the Global South, through building strong partnerships. This combination enhances the livelihood trajectories and resilience of millions of resource-poor farmers, while working towards a more productive, inclusive, and resilient agrifood system within planetary boundaries. CIMMYT is a core CGIAR Research Center, a global research partnership for a food-secure future, dedicated to reducing poverty, enhancing food and nutrition security and improving natural resources.
Delivery of HT maize hybrids to smallholder farmers in South Asia 
