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Network develops optimized breeding pipelines for accelerated genetic gains in dryland crops

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

Participants from the breeding pipelines optimization meeting at the Safari Park Hotel, Nairobi, Kenya. (Photo: CIMMYT)

Partners from the Africa Dryland Crop Improvement Network (ADCIN) from 16 institutes in Africa came together for a four-day workshop in Nairobi, Kenya, during 19-22 September 2023, to critically review and optimize breeding pipelines for newly formed breeding programs. The meeting provided an opportunity for multidisciplinary scientists to better understand each other’s significant roles and contributions in achieving optimized breeding pipelines.

Nine female and 28 male scientists working across 14 countries made up the group of experts at the workshop, which included crop breeders, quantitative geneticists, crop protection scientists, genomics experts, and data analysts. Together, they collaboratively developed, assessed, and refined the various stages and processes of breeding pipelines. Most participants were crop breeding leads from the national agricultural research and extension systems (NARES) and CGIAR Research Centers, as well as members of the Breeding Informatics Working Group A, the first of its kind as a strategic leadership group of crop breeding experts.

The workshop sponsored by CIMMYT focused on improving genetic gains across six crops: chickpea, pigeon pea, finger millet, pearl millet, groundnut, and sorghum. The workshop was organized by CIMMYT experts, Abhishek Rathore, breeding data and informatics expert, Keith Gardner, quantitative geneticist, and Roma Rani Das, biometrician, and quantitative geneticist experts from the CGIAR Accelerated Breeding Initiative, Dorcus Gemenet and Christian Werner.

Multidisciplinary expertise in action

Under the guidance of the Associate Program Director and the Breeding Lead for Dryland Crops, Harish Gandhi, participants engaged in an array of advanced genetic approaches, statistical techniques, and quantitative concepts presented by the participating experts from CIMMYT and CGIAR Accelerated Breeding.

Each breeding program schema was reviewed from detailed quantitative genetic aspects and agreed project criteria, including choosing parents, the optimum number of parents, crossing designs, the number of generations, methodologies, testing strategies, and analytical frameworks. The group deliberated on the breeding strategies tailored for respective market segments and target product profiles to further improvise and optimize breeding pipelines to enhance the programs’ efficiency.

Agreements were reached on the number of founder parents, the number of crosses and progenies in various generations, line development method, evaluation and testing strategy, time until parental selection (cycle time), marker assisted selection (MAS), genomic selection (GS) strategy, making routine use of molecular markers for QA/QC. The team also finalized the breeding strategies tailored for respective market segments and target product profiles to further improvise and optimize breeding pipelines aimed at higher genetic gains.

In coordination with crop breeders from CIMMYT, the NARES dryland crop breeding leads presented the current schematics of breeding pipelines for both line and hybrid breeding, highlighting the market segment, Target Product Profile (TPP) and Target Product Environment (TPE).

The breeding informatics team also showcased the upcoming Dryland Crops Trial Information System dashboard, a one stop shops to capture, host, and provide information on the trials organized by the network’s NARES breeders across Africa.

Collaboration for genetic gains

Crop breeding experts discuss strategies for breeding pipeline optimization. (Photo: CIMMYT)

The value of partnership working was frequently highlighted by the speakers. Michael Quinn, lead of the CGIAR Accelerated Breeding Initiative, gave an overview of the initiative’s objectives and high-level goals in 2023, emphasizing the need to foster dialogue and alignment across breeding teams. He also underlined the importance of such hand-in-hand meetings for fostering cross-regional and cross-institute learning.

“Plant breeding has always been at the center stage of crop improvement, but it has become more and more important lately, and there is a need to bring more collaborative efforts across disciplines to realize higher genetic gains in our breeding programs,” said Kevin Pixley, Dryland Crops program director and Wheat program director during his virtual presentation.

“Interaction with the breeding leads from CIMMYT and the NARES in East and Southern Africa (ESA) and West and Central Africa (WCA) and other experts helped in cross learning from the advanced breeding programs,” said Maryam Dawud, plant breeder at the Lake Chad Research Institute in Nigeria. Such workshops are needed for developing optimized breeding pipelines, and we will need more such in-person workshops on advanced data analysis.”

Next steps for dryland crops

During the workshop, network partners came up with an optimized breeding pipeline incorporating advanced quantitative genetic and statistical principles aligned with the latest scientific advancements and market demands. The group further developed a six-month actionable plan split by region to address common bottlenecks across the crops, such as capacity building in data analysis, modernizing digital infrastructure, training and enhancing human capacity in the use of equipment, and managing staff turnover.

All these deliberations provided the network partners with better insights and hands-on-experience to design their breeding pipeline, outlining specific steps, responsibilities, and timelines for implementing the identified optimizations. This preparatory work will ensure there is a targeted and coordinated effort toward pipeline enhancement and accelerated genetic gain for dryland crops in the region.

Happy Daudi, head, Groundnut Research Program at Tanzania Agricultural Research Institute (TARI), who participated in the workshop, stated, “Bringing in multidisciplinary experts provided a great opportunity to integrate various concepts of population improvement, product development, and deploying advanced statistical approaches for optimizing our breeding pipeline for achieving higher genetic gains, and accelerated variety turn over.”

Thank you to the Bill and Melinda Gates Foundation, the United States Agency for International Development (USAID), and CGIAR, for their generous funding which made this workshop possible.

No Stones, No Grit! A game-changing technology to process small grain introduced in Zimbabwe

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

Farmers thresh wheat at an irrigation scheme. (Photo: CIMMYT)

In Zimbabwe, the traditional, laborious, and time-consuming small grain processing may soon belong to the past, thanks to a game-changing technology: a multi-crop thresher. This scale-appropriate machine offers a smarter and less strenuous way to produce high-quality small-grain meals, including in drought-prone regions, without being contaminated with sand or stone particles.

“One of the main impediments to large-scale adoption of sorghum and millet in drought-prone areas is the laborious task of threshing. This has been solved by introducing multi-crop threshers, which form a central part in the business of mechanization service providers in rural Zimbabwe”, says Christian Thierfelder, principal scientist and project lead for the Mechanization and Extension Activity.

The introduction of the multi-crop thresher not only alleviates the physical strain of manual threshing but also enhances the overall quality of small-grain products. This innovation is a crucial step forward in promoting the production and consumption of small grains in Zimbabwe, contributing to food security and improved livelihoods for farmers.

This innovation was introduced by the Feed the Future Mechanization and Extension Activity, implemented by CIMMYT and funded by the United States Agency for International Development (USAID), to address the challenges of traditional small grain processing and offer new market opportunities to farmers.

Multi-crop thresher. (Photo: CIMMYT)

Small grain production and consumption has traditionally been a household favorite in Zimbabwe due to its rich nutritional content. However, the sand content and gritty texture, often associated with sorghum or millet meals, have led to a decline in consumers’ interest in it. The main culprit? The traditional method of manual threshing on the soil, a strenuous and time-consuming process that incorporates sand and gravel particles into the threshed grains (and then into flours), resulting in an unpleasant eating experience.

In Zimbabwe and across the region, small grain processing has been characterized by the arduous task of manual threshing using sticks. Women, often at the forefront of this task, repeatedly beat the heads of small grains on hard surfaces, such as granite or hard clay, to separate the grains. Despite efforts to minimize contamination by threshing them into sacks or on plastic sheets, the gritty taste persists. The subsequent winnowing, roasting, and milling do little to eliminate tiny soil and stone particles from the final product (flour) as physical separation is technically challenging.

The multi-crop thresher for smooth results

“Powered by an 8 HP diesel engine, the multi-crop thresher is a perfect machine to process sorghum, millets, maize (husked or un-husked), wheat, cowpea, sugar beans, and soybean,” says Abdul Matin, mechanization specialist and technical lead of the Mechanization and Extension Activity. “It is locally made in Zimbabwe and designed to promote mechanization as a business as it can easily be transported. It has high threshing efficiency, is fuel-efficient, easy to operate, and women friendly.”

The operator simply feeds the crop into the inlet hopper, and as it passes through the threshing drum, the machine efficiently separates the grain from the chaff, releasing clean grain through the outlet chute. “The thresher will help reduce decline of small grain production in the country and complement government efforts to expand its cultivation in Natural Regions IV and V in Zimbabwe,” Matin added. When operating the machine efficiently, one can thresh up to 0.5 tons per hour for small grains.

The multi-crop thresher, a vital component of climate-resilient agriculture

The multi-crop thresher is an efficient post-harvest machine that can process various grains. (Photo: CIMMYT)

CIMMYT organized awareness meetings, including the 2023 Seed and Mechanization Fairs, for farmers to witness the speed and quality performance of the multi-crop thresher. They could also assess the quality of pearl millet processed using the thresher and others threshing wheat in an irrigation scheme showcasing the efficiency of the process and improved grain quality.

“In our region, harvesting small grains was always laborious,” explains Paidamoyo Kaseke from Ward 4 in Chimanimani district, Manicaland province. “But thanks to the multi-crop thresher, it’s now much easier. It operates quickly and efficiently, delivering clean grains that we can promptly take to the mill. This technology has revolutionized our harvesting process, significantly reducing the time and effort required.”

“Not only do we promote new and effective technologies such as the multi-crop thresher in the project, but we also seek solutions for farmers without high incomes to be able to afford the thresher. That is why we are partnering with two Zimbabwean banks to make small-scale loans accessible to farmers at affordable rates and tenure times. This way, we can effectively scale the access to scale-appropriate mechanization solutions.” says Leon Jamann, chief of party for the Mechanization and Extension Activity.

As the 2023-2024 farming season has been dry with erratic rainfall, rainfed dependent farmers already face drought in large areas of Zimbabwe. However, the promotion of more climate-resilient small grains in 2023—declared by the United Nations the International Year of Millets—emphasizes their adaptability to climate change and their high nutritional value. The multi-crop thresher, a vital component of this initiative, ensures that farmers can efficiently process small grains despite the challenging climate conditions.

Empowering communities through sustainable agriculture

Written by mcallejas on . Posted in Blogs.

Miriam Torres conducts field activities in eastern Honduras. (Photo: Mirian Torres)

In the eastern region of Honduras, Mirian Lizeth Torres, an agroindustrial engineer who graduated from the National Autonomous University of Honduras, is making a difference. Her commitment to agricultural sustainability and the empowerment of local communities through sustainable agriculture is evident in her work with the Eastern Regional Farmers Association (ARSAGRO, for its acronym in Spanish) and with her participation in the InnovaHub Oriente, set within the framework of the AgriLAC Resiliente initiative.

“In 2023, I volunteered at ARSAGRO, addressing crucial issues with producers, from events and extension to projects with CIAT that focused on the assessment of plots, water, soil, forest, pests and diseases, bean nutrition, grain quality, among others,” said Mirian, highlighting the breadth of her experience.

Her participation in the InnovaHub Oriente has been key to integrating theory and practice in the field. “I am a student of the conservation agriculture course, where I have explored agronomic practices that improve the sustainability of crops, creating more resilient systems,” she highlights. “These practices are shared with producers through innovation modules, which are plots where conservation agriculture innovations are implemented and compared, side by side, with conventional methods.”

Mirian knows the importance of communicating this knowledge to communities. “At events held on these plots, we shared practices and knowledge, reaching producers who were not familiar with these technologies,” she explains. “Thanks to AgriLAC, in 2023 we contributed significantly to the empowerment of producers and organized groups in eastern Honduras.”

Additionally, Mirian is proud of her role as an inspiration for the inclusion of youth and women in agriculture. “At every event we organize, we see increasing participation of young people and women,” she states. “The empowerment of women in agricultural activities has been notable, with many resuming activities in the field through the transfer of knowledge.”

Looking to the future, Mirian hopes to further encourage youth participation. “My invitation to young people is not to abandon the field; it is that they get involved in agricultural issues to contribute to the livelihood of their families and, at the same time, reduce migration,” she states with determination.

In a world where sustainable agriculture is essential, Mirian Lizeth Torres has assumed solid leadership from the field, helping her community move towards a more sustainable and equitable agricultural future.

Looking to the future, Mirian hopes to further encourage youth participation. “My invitation to young people is not to abandon the field, but rather that they get involved in agricultural issues to contribute to the livelihood of their families and, at the same time, reduce migration,” she states with determination.

Women farmers turn the tide on soybean production

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

Juliana Moises tends her soybean plot. (Photo: CIMMYT)

From the rich plateau landscapes of Angonia district in the Tete province of Mozambique emerges a tale of determination and hard work. Juliana Nicolau Moises, a mother of four, has been a devoted soybean farmer for more than a decade, tending to a crop whose pods carry the potential for value-added products, including milk and porridge for her children. But one wonders, what motivates smallholder farmers like Juliana to invest their efforts in soybean production.

“I have never looked back on producing soybeans,” reflects Moises. “This legume crop has allowed me to feed my family and meet my household needs, let alone the cash income from sales of the surplus crop. It has taken a lot of hard work and resilience to navigate through the complexities of soybean production.”

Entering her second season of implementing the Chinyanja Soy Use Case trials with CGIAR’s Initiative on Excellence in Agronomy, delivered in partnership with CIMMYT and the International Institute of Tropical Agriculture (IITA), Moises eagerly anticipates a bumper harvest in the early planted fields. She has been avidly implementing trials on planting dates to establish the implications of early, mid, and late planting on soybean yield. Let alone the required attention to detail, she exudes a deep understanding of the significance of the trials by carrying out key agronomic practices to ensure a good harvest. This will not only nourish the health and wellbeing of her family but also symbolizes the fruits of her dedication.

Moises’s commitment extends beyond the trial she hosts as she implements her learning from the project to other fields, using innovative approaches like the double-row planting method. In soybean farming, this involves planting two rows of seeds on a wider ridge established on the traditional spacing that farmers use on maize. Traditionally, farmers in Angonia have been planting single rows of soybean on ridges spaced at 90 cm used for maize, thereby resulting in low soy plant populations and ultimately low yields. This different technique optimizes the plant population and land use efficiency, improving yields, and facilitating easier weeding.

Moises’s soybean plot in Angonia, Mozambique. (Photo: CIMMYT)

Despite the promise of enhanced production, challenges persist. Southern Africa continues to face a growing demand for soybeans, with annual productivity of 861,000 metric tons (mT) falling short of the 2-million-ton demand. In Mozambique, vibrant soybean farms blanket the landscape, yet smallholder farmers like Moises grapple with underdeveloped markets and climate-related adversities, such as droughts and floods currently worsened by the El Niño phenomenon.

“As a devoted soybean farmer, I have met my own fair share of challenges. One of our biggest challenges is the labor requirement across the production season,” shared Moises as she navigates through her fields. “We need machinery for planting, weeding, and harvesting in order to reduce the labor and drudgery associated with soybean production. In addition, markets remain a challenge.” Her unwavering commitment inspires neighboring farmers, creating a ripple effect of hope and determination in the community.

Sharing the same sentiments is Veronica Ernesto Gama, who teams up with her husband every year to tend to her soybean field. Having started in 2007, their yields have sustained the food basket of her family while meeting nutritional needs. “In the past, I used to just scatter around soybean seeds in one place, but after these trials, I have learned the significance of applying the agronomically recommended spacing and the need for quality improved seeds to ensure a bumper harvest,” said Gama.

The power of collaboration

Addressing these challenges head-on is CGIAR’s Excellence in Agronomy Chinyanja Triangle Soy Use Case, a collaborative effort aimed at strengthening the soybean industry primarily by empowering farmers with improved agronomic practices and decision support. Solidaridad, an international non-government organization (NGO) pursuing digital platforms for scaling agronomy, serves as the demand partner of the Excellence in Agronomy Chinyanja Triangle Soy Use Case, while CGIAR provides technical support. Solidaridad’s role is vital in catalyzing demand for the product or service in question. Research outputs drawn from the trials will be used to develop a mobile phone application on the Kvuno, a social enterprise borne out of Solidaridad. The platform will support farmers with onsite advisories on planting dates, site-specific fertilizer recommendations, variety selection, and crop configurations.

To date, the initiative has drawn the willingness of 70 farmers in the Angonia district of Tete province, who are implementing different suites of trials, including nutrient omission, planting date, plant configuration, and fertilizer usage. Excellence in Agronomy has come at an opportune time for smallholders’ journeys in soybean production, emphasizing the importance of optimized spacing and improved agronomic practices.

As the story unfolds in Mozambique, women like Moises and Gama are the unsung heroes driving soybean production. Their dedication, coupled with initiatives like Excellence in Agronomy, paint a picture of progress and potential. Their commitment inspires many surrounding farmers who draw inspiration on the trials in their fields. As the sun continues to rise over the dusty soils of Angonia, it showcases not just Moises’s fields, but the bright future of soybean production in the hands of resilient women farmers.

Product Design Teams (PDTs): A client-oriented approach to defining market segments and target product profiles

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

Participants from the Kenya PDT meeting held in Nairobi. (Photo: CIMMYT)

Product design teams (PDTs) are a CGIAR Accelerated Breeding Initiative innovation created to address the aforementioned challenges under the CGIAR-NARES partnership through coordinating SPMS and related TPPs. Each seed product market segment, which in the case of CGIAR is defined at sub-regional level, represents a unique set of requirements. Attached to the segment is a TPP which describes the ideal product to meet the requirements. Taken together, the framework provides a starting point for discussions by breeding teams on investment opportunities.

Discussions on market segments and TPPs need to develop over time as new insights are gained. Some requirements might be overlooked, and others may be emerging due to client requirements and changes in the context. There is a need for a greater understanding of the evolving requirements of the seed companies, farmers, processors, and consumers in the market segments that CGIAR serves. It must be recognized that not all requirements of farmers or consumers are amenable to breeding or efficient to incorporate in breeding pipelines – for example, some post-harvest losses or weed management can be best addressed by appropriate storage mechanisms and improved agronomic practices, respectively.

Product design teams (PDTs) were created to address the aforementioned challenges under the CGIAR-NARES partnership by and coordinating SPMS and related TPPs. A PDT is a group of crop breeding and seed systems stakeholders for a particular crop, who work together to design or redefine TPPs. PDTs have been envisioned to be cross-functional teams that meet annually with the following aims:

  • Review the market segments at subregional and national levels, addressing critical questions, such as:
    • Do the subregional segments capture country-level requirements?
    • What is the opportunity for impact from breeding investments across market segments?
    • Are there important market segments that have not been captured?
    • What are the potential future segments that the team needs to consider?
  • Review and update TPPs for each segment, addressing questions such as:
    • Are any important traits missing?
    • Are country-specific trait values factored?
    • Are country-specific market-dominant varieties included in the market segment?
  • Discuss the needs for market intelligence for the PDT:
    • Unknowns regarding client requirements.
    • Gaps regarding product design parameters.

Director of the Global Maize program at CIMMYT, B.M. Prasanna, said, “PDT meetings serve as an important platform to understand the perspectives of diverse and relevant stakeholders. These discussions enable us to reach a common understanding of the current market requirements and redefine TPPs to reflect needs across value streams through co-creation and shared responsibility.”

The impact of PDTs

Pieter Rutsaert, seed systems specialist at CIMMYT and the CGIAR Market Intelligence Initiative, participated in several PDTs on maize and other crops, such as groundnut. “PDTs are a useful format to understand the unknowns in terms of farmer, processor, and consumer requirements and generate questions that guide future work in market intelligence,” said Rutsaert.

Product Design Team (PDT) meetings bring together breeding and seed systems stakeholders to improve understanding of country and regional needs for a specific crop. (Photo: CIMMYT)

“PDTs will help in routine review of the product requirement for a specific country and will help to remove breeder bias and ensure that all stakeholders’ views are heard and considered”, said Aparna Das, technical program manager for the Global Maize program at CIMMYT.

The main requirements for constituting PDTs for a specific country are:

  • A multidisciplinary team with 7 to 15 members, ensuring diversity of experience and providing reasonable time for decision-making.
  • Must consist of a range of stakeholders, such as: breeders from NARES (often the PDT convener/lead) and CGIAR; representatives of farmers’ groups, seed companies, and food processors; gender specialists; and market intelligence specialists.
  • 30% of members should be female.
  • Should include a member from another crop breeding network, to bring a different perspective.

Bish Das, NARS coordinator, Dragan Milic, breeding specialist, and Lennin Musundire, breeding optimization specialist, from the CGIAR Accelerated Breeding Initiative team said, “Ultimately, the client-led approach to priority setting that CIMMYT’s Global Maize program is implementing in southern and eastern Africa ensures strong alignment with partners’ priorities and client requirements and better targeting of CGIAR regional maize breeding efforts.”

Case study: maize seed systems

CIMMYT’s Global Maize program has refined variety development to meet market needs across the value chain including farmers, processors, and consumers, thus enhancing variety adoption, which is the end goal of breeding pipelines. This has been implemented through the regional CGIAR-NARES-SMEs collaborative breeding networks and having ‘a bottom-up’ approach towards developing market segments and TPPs. This refers to building an understanding of end-users’ needs through inclusive in-country and regional stakeholder PDT meetings. PDTs also ensure that there are CGIAR-NARES-SME defined roles: a national mandate for NARES partners focusing on niche markets, the consolidated national mandate for CGIAR/NARES/SMEs, and a regional mandate for CGIAR Research Centers like CIMMYT.

In 2023, maize PDT teams were established and held meetings for five countries in eastern and southern Africa: Zambia, Ethiopia, Kenya, Zimbabwe, and Uganda. These meetings brought together stakeholders from different fields who play an important role in product development and seed systems (national partners and seed companies), varietal release (representatives from regulatory agencies) and end-product users (for example, millers).

The advantages of TDPs are emphasized by Godfrey Asea, director of Research and Daniel Bomet Kwemoi, maize breeder at the National Agricultural Research Organization (NARO) in Uganda. They highlighted that the NARO maize program has now begun a systematic journey toward modernizing its breeding program. The PDT team validated the country’s market segments and aligned five product profiles with two major target production environments (TPEs), with the mid-altitude regions taking 85% of the maize seed market and the highlands accounting for 15%. “These TPPs will be reviewed annually by the PDT since market segments tend to be dynamic. The breeding program has reclassified and aligned breeding the germplasm to TPPs, which will guide effective resource allocation based on the market shares,” said Asea.

Feedback on PDT meetings so far suggests positive experiences from stakeholders. Wendy Madzura, head of agronomy at SeedCo in Zimbabwe, said, “The unique PDT meeting held at CIMMYT in Zimbabwe provided a conducive environment for public and private stakeholders to have meaningful and honest discussions on the current market segments and TPPs.” Plans for continuous improvement are embedded in the PDT model. “As a follow-up to the PDT meeting, there is a need for further involvement of various stakeholders at the village, ward, and district levels to enable deeper insights and reach because the client needs are constantly changing,” said Madzura.

Advancing wheat breeding through rapid marker-selectable trait introgression

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

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 reality—marked by the entry of 97 F5-lines into yield trials—signals 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.

East African wheat breeding pipeline and E&SSA network

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

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 CIMMYT’s 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.

Enhancing wheat breeding efficiency in South Asia through early germplasm access

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

Wheat field. (Photo: CGIAR)

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 Obregón, 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 Obregón 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 Obregón 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 Obregón 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.

Reaching farmers in Zambia

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

Farmers are guided on how to use Atubandike and VIAMO. (Photo: CIMMYT)

It is challenging to disseminate information across far-flung areas of rural Zambia as extension officers must travel vast distances to reach farmers. The Southern Africa Accelerated Innovation Delivery Initiative (AID-I) MasAgro Africa Rapid Delivery Hub, managed by CIMMYT and funded by the United States Agency for International Development (USAID) helps alleviate these issues by engaging with existing mobile phone networks to reach farmers with agronomic information, weather data, and soil information.

To introduce farmers to these specific tools: Atubandike and VIAMO, AID-I conducted a community sensitization and engagement exercise in Zambia. Atubandike emphasizes farmer learning and feedback using mobile phones for disseminating knowledge about the new generation of drought-tolerant varieties, sustainable intensification practices, and collecting farmer feedback to enable demand-driven delivery under AID-I. VIAMO, accessible via a basic mobile phone, provides agronomic information for every farmer in a specific area. The platform comes in different languages and farmers access information on various crops such as maize, beans, and groundnuts in their native language, provide feedback on information content, and connect with other farmers.

An AID-staff facilitates a training session. (Photo: Nancy Malama/CIMMYT)

In Choma District, Morgan Katema, who provides extension services to farmers, explained that going digital is one way of reaching farmers through technology to ensure that all farmers have access to extension services. “In this case, lessons will be available through mobile phones and farmers will ask agriculture-related questions and get a response. This is a good initiative because farmers can access information on the spot instead of waiting for an extension officer to reach them, and information can be accessed after working hours, and the VIAMO initiative will help us overcome the challenge of long distances between farmers as we will no longer need to travel long distances,” Katema said.

Judith Simuliye, a farmer who grows maize and groundnuts, said, “I was told about this meeting by the camp officer, and I am happy to learn about this project. I have learned how to manage my crop by using the right seed varieties and how to space the crops.”

During the meeting, two community facilitators were selected through a voting process, after farmers nominated community members who are literate, trustworthy, energetic, and able to use a smart phone. Facilitators register farmers on the VIAMO platform, assist them in accessing the information they require, and support them in their learning journey.

Namasumo Rithay, a farmer in the village of Kalalasa, said, “Mobile phone access to extension services has come at the right time. We have faced a lot of challenges with the poor rain patterns and pests. Through this meeting organized by AID-I, we have learned how we can obtain information to mitigate these challenges through our mobile phones.”

A participant casts her vote. (Photo: Nancy Malama/CIMMYT)

An additional community meeting was held in the village of Namuswa and was attended by 150 farmers. AID-I and Atubandike Research Associate, Brian Mpande, informed farmers that AID-I, with the assistance from VIAMO, will help them overcome the challenges of climate change by delivering timely and useful information via their phones. 

Advancing conservation agriculture

Written by Nur-A-Mahajabin Khan on . Posted in Blogs.

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.

Strengthening resilience in Mutoko farmers through agroecological research

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

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.

Heat tolerant maize hybrids: a pursuit to strengthen food security in South Asia

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

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.

Market segmentation and Target Product Profiles (TPPs): developing and delivering impactful products for farming communities

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

Experimental maize field. (Photo: CIMMYT)

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.

Researchers gather to reflect on and lead CIMMYT’s Gender Equity and Social Inclusion (GESI) efforts with renewed commitment and partnership

Written by Nima Chodon on . Posted in Blogs.

SAS Program Director Sieg Snapp and GESI researchers gather in New Delhi from across CIMMYT – Asia, Africa, and Latin America. (Photo: Adeeth Cariappa/CIMMYT)

“As we look towards 2030, CIMMYT is focused on building inclusive value chains, advancing mechanization, and confronting seed system challenges. We are championing demand-driven technologies and improved agricultural needs,” said Sieglinde Snapp, program director of CIMMYT’s Sustainable Agrifood Systems (SAS) program, highlighting during the discussions the importance of integrating gender perspectives in research. “We are committed to integrating gender perspectives in all these initiatives, recognizing the vital role of women in agriculture and ensuring equitable access to resources and opportunities for all genders,” she added.

Farah Deba Keya presents her study analyzing constraints for women farmers’ active participation in mixed farming systems in Bangladesh. (Photo: CIMMYT)

The one-day meeting on October 13, 2023, in New Delhi, India, hosted under CIMMYT’s SAS program, brought together diverse groups of participants—totaling over ten senior gender researchers working in Africa, Asia, and Latin America, namely Sieg Snapp, Vijesh Krishna, Moti Jaleta, Michael Euler, Angela Meentzen, Monica Fisher—along with a cadre of junior and senior researchers and students collaborating with CIMMYT on gender research. The coming together of these GESI researchers provided a valuable opportunity for collaboration, sharing insights, and strategizing enhanced gender and socially inclusive research-for-development approaches within CIMMYT’s programs.

Monica Fisher, a senior researcher working in Africa, emphasized CIMMYT’s dedication to making gender equality and social inclusion more visible and relevant in agriculture globally. She said, “The significance of GESI research, particularly in bridging the gap between the Global South and the Global North, cannot be overstated. Our objective is to deepen our engagement in these areas.”

The day-long meeting covered various topics, including the dynamics of technology adoption, gender roles in agriculture, and the feminization of Indian agriculture. Discussions underscored the need for increased financial support for GESI research, the importance of addressing disparities in research focus, and the crucial role of intersectionality in agricultural contexts.

A notable segment of the meeting was dedicated to presentations by students on their ongoing research in gender-related topics. These young researchers brought fresh perspectives and innovative ideas, highlighting the evolving nature of gender roles in agriculture and the impact of technology on gender dynamics in various regions. Their contributions underscored the importance of fostering a new generation of researchers committed to gender equity and social inclusion in agricultural development. Hari Krishnan K. S., a student working with CIMMYT opined, “My study, supervised by CIMMYT’s gender researchers, revealed that the concept of masculinities transcends gender, focusing instead on effective farming practices. It highlighted the diverse influences on agricultural decision-making and the varied reactions to technology adoption in Punjab’s agriculture. This reflects the critical role of CIMMYT’s gender-focused research in shaping my approach and understanding as a student in this field.”

Contributing his perspective, Vijesh Krishna, lead researcher working in India, highlighted the need for innovation in research approach. According to him, “To revolutionize GESI research, a shift towards longitudinal data analysis and cross-country data utilization is needed. Building evidence and documenting changes in gender dynamics due to policy and social transformations are essential.” He further encouraged the fostering of in-house capacities to mainstream gender considerations across disciplines, enhancing collaboration, and developing skills for the effective communication of research findings to stakeholders.

Snapp believes that the meeting was not just a gathering of minds but a milestone in CIMMYT’s ongoing journey towards agrifood systems development. “It reaffirms the organization’s commitment to impactful research that acknowledges and addresses the nuances of gender and social dynamics in agriculture, paving the way for a more inclusive and sustainable future in the sector.”

Sieglinde Snapp explains initiatives to support urgent and relevant GESI research and efforts within CIMMYT’s programs (Photo: CIMMYT)

As the meeting concluded, Snapp spoke of the resolve to make GESI efforts urgent and relevant. She proposed three initiatives: firstly, renaming the SAS gender team the “Paula Kantor Gender and Development Centre” to reflect a broader scope and purpose; secondly, establishing a mentorship program to offer career guidance, networking opportunities, and professional development support; and finally, the introduction of a prestigious “Research Excellence in the Field” award in Paula Kantor’s honor.

“These initiatives aim to enhance the impact and recognition of the organization’s gender-focused efforts, promote professional growth, and honor excellence in the field, embodying CIMMYT’s commitment to gender-focused efforts,” she explained.

The meeting minutes are available here.

Soybean rust threatens soybean production in Malawi and Zambia

Written by Julian Bañuelos-Uribe on . Posted in Blogs.

Healthy soybean fields. (Photo: Peter Setimela/CIMMYT)

Soybeans are a significant source of oil and protein, and soybean demand has been increasing over the last decade in Malawi and Zambia. Soybean contributes to human nutrition, is used in producing animal feed, and fetches a higher price per unit than maize, thus serving as a cash crop for smallholder farmers. These are among the main factors contributing to the growing adoption of soybean among smallholder producers. In addition, soybean is a vital soil-fertility improvement crop used in crop rotations because of its ability to fix atmospheric nitrogen. To a large extent, soybean demand outweighs supply, with the deficit covered by imports.

Soybean production in sub-Saharan Africa is expected to grow by over 2% per annum to meet the increasing demand. However, as production increases, significant challenges caused by diseases, pests, declining soil fertility, and other abiotic factors remain. According to official government statistics, Zambia produces about 450,000 tonnes of soybean per annum, with an estimated annual growth of 14%. According to FAOSTAT, this makes Zambia the second largest soybean producer in the southern African region. Although soybean was traditionally grown by large commercial farmers in Zambia, smallholders now account for over 60% of the total annual soybean production.

Production trends show that smallholder soybean production increased rapidly in the 2015–2016 season, a period that coincided with increased demand from local processing facilities. As smallholder production continued to increase, in 2020, total output by smallholder farmers outpaced that of large-scale farmers for the first time and has remained dominant over the last two seasons (Fig 1). However, soybean yields among smallholder farmers have remained low at around 1 MT/HA.

Figure 1. Soybean production trends by smallholders and large-scale farmers. (Photo: Hambulo Ngoma/Zambia Ministry of Agriculture, Crop Forecast Survey)

Soybean production in the region is threatened by soybean rust caused by the fungus Phakopsora pachyrhizi. The rust became prevalent in Africa in 1996; it was first confirmed in Uganda on experimental plots and subsequently on farmers’ fields throughout the country. Monitoring efforts in the U.S. have saved the soybean industry millions of dollars in fungicide costs due to the availability of accurate disease forecasting based on pathogen surveillance and environmental data.

Soybean rust disease is spread rapidly and easily by wind, and most available varieties grown by farmers are susceptible. The above-normal rainfall during the 2022–2023 season was conducive to the spread of the fungus. A recent survey of over 1,000 farm households shows that 55% and 39% of farmers in Zambia and Malawi, respectively, were affected by soybean rust during the 2022–2023 season. The lack of rust-tolerant varieties makes production expensive for smallholder farmers who cannot afford to purchase fungicides to control the pathogens. It is estimated that soybean rust can cause large yield losses of up to 90%, depending on crop stage and disease severity. Symptoms due to soybean rust infection may be observed at any developmental stage of the plant, but losses are mostly associated with infection from the flowering stage to the pod-filling stage.

Soybean plants affected by soy rust. (Photo: Peter Setimela)

Mitigation measures using resistant or tolerant varieties have been challenging because the fungus mutates very rapidly, creating genetic variability. Although a variety of fungicides effective against soybean rust are available, the use of such fungicides is limited due to the high cost of the product and its application, as well as to environmental concerns. Due to this restricted use of fungicide, an early monitoring system for detecting rust threats for steering fungicide might only be relevant for large-scale producers in eastern and southern Africa. With the massive increase in the area under soybean production, soybean rust is an important disease that cannot be ignored. Host-plant resistance provides a cheaper, more environmentally friendly, and much more sustainable approach for managing soybean rust in smallholder agriculture that characterizes the agricultural landscape of eastern and southern Africa.

To advance the use of rust-tolerant varieties, the Southern Africa Accelerated Innovation Delivery Initiative (AID-I) Rapid Delivery Hub, or MasAgro Africa, is presently concluding surveys to assess farmers’ demand and willingness to pay for rust-tolerant varieties in Malawi and Zambia. The results from this assessment will be valuable to seed companies and last-mile delivery partners to gain a better understanding of what farmers need and to better serve the farmers.  This coming season AID-I will include rust tolerant varieties in the mega-demonstrations to create awareness about new varieties that show some tolerance to rust.