Umm Zeina, a 40-year-old farmer living in El Nahal, in Sudan’s Gadarif State, was not happy with her yield, blaming the poor seeds and traditional techniques she was using. This was until she participated in the extensive seeds production training program organized by the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT).
“We learned a lot on how to produce seeds and how to control the parasite Striga mixed with crops. The training draws our attention to the fact that the availability of quality seed is the foundation for food production and productivity. As traditional farmers, we had very poor information about the availability, characteristics, and prices of seed of improved varieties,” Umm Zeina stressed.
ICRISAT’s extensive training attracted more than 350 (68 female) seed producer farmers from El Fashaga and El Nahal localities aimed at helping seed producers provide seeds of appropriate varieties for use by different categories of farmers. Farmers were also trained in better selection, treatment, and storage of seed from their own farms. The training also focused on the production of disease-free seeds to support agricultural productivity and success. The training helped to enhance farmers’ demand for improved seeds and eventually aimed to deliver improved seeds to more than 6000 farmers in El Fashaga, El Nahal and other neighboring localities.
This training was held as part of CIMMYT’s Sustainable Agrifood Systems Approach for Sudan (SASAS) program, which empowers farmers and herders to reduce the need for humanitarian assistance even in conflict-affected Sudan. In the context of the atrocious food crisis in Sudan, SASAS and partners work to ensure that farmers produce the quality seeds they need to enhance food production amid escalating conflict.
In El Fashaga and El Nahal localities, the seeds production training focused on sorghum, as this crop is widely adapted and drought tolerant as well as it is a staple crop to strengthen food security and contributes to agricultural diversity and economic growth in the regions where it is cultivated.
“During the training, we learnt a lot on how to choose the best seeds to produce improved seeds and how to choose the land, isolation area, and cleanliness to harvest. I was extremely interested to learn more about how to keep the seed to its purest form for replanting purposes and human or animal consumption,” said Tarig Hassan, a farmer living in El Nahal locality.
The seeds production training also aimed at maintaining seeds quality control through training and regulatory systems, and how to multiply and distribute seeds in a timely manner and at a price affordable for farmers. Farmers also learnt to use a revolving seed mechanism to make available seeds for many new seed producer farmers for the next season through farmer-to-farmer seeds distribution.
“The seed production training is not only on how to produce quality seeds and protect loss of seeds, but also about the use of diversified seeds of sorghum, millet and ground nut that serve for both food and nutrition security”, said Gizaw Desta, Senior Scientist in ICRISAT.
SASAS’s objective is to improve food security and access to income-generating opportunities through the adoption of sustainable agriculture practices and the promotion of agri-processing and post-harvest management. It focuses on supporting smallholder crop and livestock farmers to adapt their farming activities to climate change and abiotic pressures by diversifying their crops to further cushion themselves from climatic vagaries, reduce post-harvest loss, and improve market participation, and functionality. Women and youth are supported through training and agricultural and veterinary inputs to increase income generation activities and access to economic resources.
“At SASAS, we strive to train farmers in basic farm seed production. This helps preserve and expand the diversity of the seed on which our food systems in Sudan rely. Considering the dire food security situation in the country, we fully encourage farmers to be engaged in seeds production to provide different and improved seed varieties,” said Abdelrahman Kheir, SASAS Chief of Party in Sudan.
SASAS works with ICRISAT to uplift smallholder farmers and ensure food security in semi-arid tropics. SASAS partners are committed to elevating crop productivity, resilience, and sustainability vital to dryland communities’ prosperity. This steadfast commitment profoundly affects millions in the world’s most challenging agricultural regions.
Food security in the prevailing uncertain climatic and economic conditions can only be guaranteed by deliberate actions toward maximizing production, especially in stress-prone environments. The main priority of the CGIAR and NARS breeding programs is to enhance genetic gain in crops through the assessment of seed varieties with drought-resilient, nutritional, and yield traits. This is achieved by leveraging data-driven approaches and embracing contemporary tools and methodologies.
Innovative approaches such as molecular tools, doubled haploid technology, and refined breeding schemes have greatly contributed to the strides made in CIMMYT’s endeavor to elevate genetic gain within breeding pipelines. These advancements not only drive improved productivity but also promise cost-effective strategies for navigating the challenges posed by climate variability.
Molecular Tools
In maize breeding, traditionally, at each stage of the pipeline, entries are grown in multi-location trials. Phenotyping in multiple environments helps to select the best entries not only based on their genetic values but also on environmental factors and their interaction with diverse environments. However, this is also a labor-intensive and time-consuming step in the breeding pipeline. Molecular breeding offers a transformative solution by expanding breeding programs while minimizing phenotyping requirements. It is a well-known fact that trait phenotype results from both genetic and non-genetic factors, with genetic factors being contributed by the expression of genes at the DNA level.
Identifying genomic regions close to causative genes for traits of interest, such as high yield, disease resistance, or quality, can help to incorporate desirable genes/alleles into selected elite genotypes. DNA-based markers aid in efficiently tracking the inheritance of genetic traits, thereby facilitating the selection of desired traits in breeding programs. Marker-assisted forward breeding accelerates the selection of plants with desired traits by identifying the genetic markers associated with those traits. With such harnessed genotypic information, breeders can pre-select genetic material before embarking on the resource-intensive phenotyping stages. This strategic utilization of molecular markers, particularly in identifying susceptibility to key diseases like maize streak virus (MSV) and maize lethal necrosis (MLN), enables the judicious allocation of resources for phenotyping.
Figure 1. Summary of marker-assisted forward breeding across six breeding pipelines for MLN- and MSV-resistance haplotypes over the past six years.
Since 2018, CIMMYT has been implementing marker-assisted forward breeding for MSV and MLN. Since then, more than 100,000 pure breeding lines have been tested by examining their favorable haplotypes with a small set of 10 genetic markers and discarding the lines carrying unfavorable haplotypes for MSV and MLN resistance. In the last six years, nearly 30,000 lines have been rejected before undergoing field testing. In southern Africa, for instance, a rapid response to seed movement using molecular and serological techniques prevented the spread of MLN and facilitated the incorporation of resistance traits into new plant varieties.
Most hybrids in the final stages of breeding pipelines are passed through forward breeding. While Fall Armyworm, Gray Leaf Spot, common rust, and Turcicum Leaf Blight also cause substantial yield reductions in sub-Saharan Africa, research carried out under the AGG project indicates that the genetic makeup of these traits is oligogenic, governed by both moderate and small effect quantitative trait loci (QTLs), but lacking a single major-effect QTL and not amenable to forward breeding. This means that their resistance is influenced by complex multiple genetic factors, rather than being primarily controlled by a few major genetic regions. Alternatively, these biotic stress traits can be improved effectively through genomic selection.
Genomic selection is used to improve complex traits that are controlled by many small-effect QTLs. This approach does not require prior genetic information about the trait of interest and uses genome-wide marker information to estimate all marker effects and select individuals with high genomic-estimated breeding values (GEBVs). This means it uses data from various genetic markers to predict which individuals are likely to have desirable alleles for MSV and MLN. Genomic selection is being applied for grain yield under drought stress, and efforts are underway to extend its application to address more complex challenges related to plant diseases and pests. Foliar diseases are moderately complex traits.
Proof of concept on applying genomic selection for foliar diseases like gray leaf spot and northern corn leaf blight showed high prediction accuracies, supporting the implementation of genomic selection together with forward breeding for other traits at the early stage of the breeding pipeline. Implementing genomic selection for GY under optimum and drought management proved that maize breeders could obtain the same gain as with conventional breeding, where all entries are phenotyped in the field, but at approximately 35-40% less cost. Many candidate hybrids now entering the advanced stages of the breeding pipeline were developed using genomic selection. Several of our earlier studies (Beyene et al., 2015, 2016, 2019, 2021; Chaikam et al., 2019; Crossa et al., 2017; Prasanna et al., 2022; Vivek et al., 2017) showed that breeding pipelines achieved high genetic gain by adopting new molecular tools, thus confirming the benefit of adopting molecular breeding tools.
Currently, in CIMMYT’s eastern and southern breeding pipelines, all product profiles are using genomic selection at stage I, where the training population is evaluated in multiple locations with a sparse design, estimating the GEBVs for the unphenotyped lines, and using GEBVs and phenotypic BLUPs of test crosses in the selection for stage II. This process allows the handling of a large number of lines at stage I with a fixed budget without losing selection accuracy. Since 2017, we have used the “test half and predict half” strategy (Figure 2), where all the lines were genotyped with mid-density markers, and the selected ~50% of the total stage I lines were testcrossed and evaluated in multiple locations to be used as a training population to estimate the GEBVs for the other 50% of the unphenotyped lines for the traits of interest. High prediction correlations were observed in three selected product profiles for GY under optimum, managed drought, and low soil N conditions (Figure 3).
Genomic selection is also implemented to reduce the breeding cycle. However, our final products are three-way cross hybrids, where genomic selection is applied only to select the best line rather than selecting the best hybrid combinations. Historical data were used to test the possibility of reducing the breeding cycle. However, our results showed that the use of historical data to predict 100% of lines from the current year yielded low to moderate prediction correlations both under optimum and drought conditions for GY, anthesis date, and plant height (Figure 4). Incorporating 10 to 30% of the testing population into the training population leads to high prediction correlations. This concludes that by using historical data, the training population, which needs to be test-crossed and evaluated in multiple locations every year, can be reduced from 50% to 10-30%, which helps breeders allocate the saved resources to evaluate more lines without losing prediction accuracy.
Doubled Haploid Technology
Doubled haploid technology speeds up the creation of inbred lines by producing entirely uniform lines. Pedigree line development is a traditional method in plant breeding aimed at gradually improving and stabilizing the genetic makeup of the new variety over time. It involves multiple generations of controlled crosses between parent plants with known characteristics. Each subsequent generation is carefully selected based on specific traits of interest, such as yield, disease resistance, or quality. Pedigree line development is expensive, particularly when nurseries are in remote locations.
Unlike traditional methods where some genetic variation remains, doubled haploid lines are completely homogeneous. This means that there is increased heritability of desirable traits and improved accuracy of selection. Doubled haploid technology, which is more compatible with the use of molecular markers, simplifies breeding processes and shortens the time needed to develop inbred lines (Chaikam et al., 2019).
The first doubled haploid facility in Africa was established in 2013 and is extensively used by the CGIAR, NARES, and the private sector. Over the past five years, 1,349 populations have been induced and more than 223,144 doubled haploid lines delivered to breeding programs from CGIAR, NARES, and the private sector in sub-Saharan Africa. Shifting from traditional pedigree-based breeding to doubled haploid technology has shown a high impact on key breeding metrics (gain per cycle and gain per year) not only in CIMMYT but also in national partners’ breeding programs, thus increasing genetic gain within the available budget.
Figure 2. Number of lines evaluated with phenotypic selection (PS) and genomic selection (GS) at stage I in EAPP1 product profile from 2017 to 2023. (PS – phenotypic selection, GS – genomic selection)Figure 3. Prediction correlations for grain yield (GY) under optimum (OPT), drought (MDt) and low soil N (low N) management conditions in EAPP1, EAPP2 and SAPP1 at stage I in 2023
Figure 4. Prediction accuracies for grain yield (GY), anthesis date (AD) and plant height (PH) estimated from independent validation schemes using a training population (TRN) consisting of 2017- and 2018-years breeding data and 10%, 30%, 50%, 70% and 90% of 2019 data converted from the testing population (TST) to the training population under optimum and managed drought conditions
References
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Beyene, Y., Gowda, M., Pérez-Rodríguez, P., Olsen, M., Robbins, K. R., Burgueño, J., Prasanna, B. M., and Crossa, J. (2021). Application of genomic selection at the early stage of breeding pipeline in tropical maize. Frontiers in Plant Science12, 685488.
Beyene, Y., Gowda, M., Suresh, L. M., Mugo, S., Olsen, M., Oikeh, S. O., Juma, C., Tarekegne, A., and Prasanna, B. M. (2017). Genetic analysis of tropical maize inbred lines for resistance to maize lethal necrosis disease. Euphytica213.
Beyene, Y., Semagn, K., Crossa, J., Mugo, S., Atlin, G. N., Tarekegne, A., et al. (2016). Improving maize grain yield under drought stress and non-stress environments in sub-saharan africa using marker-assisted recurrent selection. Crop Science 56, 344–353. doi: 10.2135/cropsci2015.02.0135
Beyene, Y., Semagn, K., Mugo, S., Tarekegne, A., Babu, R., Meisel, B., Sehabiague, P., Makumbi, D., Magorokosho, C., and Oikeh, S. (2015). Genetic gains in grain yield through genomic selection in eight bi‐parental maize populations under drought stress. Crop Science55, 154-163.
Chaikam, V., Molenaar, W., Melchinger, A. E., and Prasanna, B. M. (2019). Doubled haploid technology for line development in maize: technical advances and prospects. Theor. Appl. Genet. 132, 3227–3243. doi: 10.1007/s00122-019-03433-x
Crossa, J., Pérez-Rodríguez, P., Cuevas, J., Montesinos-López, O., Jarquín, D., de los Campos, G., et al. (2017). Genomic selection in plant breeding: Methods, models, and perspectives. Trend Plant Sci. 22, 961–975. doi: 10.1016/j.tplants.2017.08.011
Prasanna BM, Burgueño J, Beyene Y, Makumbi D, Asea G, Woyengo V, Tarekegne A, Magorokosho C, Wegary D, Ndhlela T, Zaman-Allah M, Matova PM, Mwansa K, Mashingaidze K, Fato P, Teklewold A, Vivek BS, Zaidi PH, Vinayan MT, Patne N, Rakshit S, Kumar R, Jat SL, Singh SB, Kuchanur PH, Lohithaswa HC, Singh NK, Koirala KB, Ahmed S, San Vicente F, Dhliwayo T, Cairns JE. 2022. Genetic trends in CIMMYT’s tropical maize breeding pipelines. Scientific Reports 12, 20110. https://doi.org/10.1038/s41598-022-24536-4
Vivek, B. S., Krishna, G. K., Vengadessan, V., Babu, R., Zaidi, P. H., Kha, L. Q., et al. (2017). Use of genomic estimated breeding values results in rapid genetic gains for drought tolerance in maize. Plant Genome 10, 1–8. doi: 10.3835/plantgenome2016.07.0070
Agrovegetal delegation stands with CIMMYT leaders and researchers. (Photo: CIMMYT)
A new agreement between a leading Spanish seed company, Agrovegetal, and the international research center CIMMYT will help safeguard the regional availability of high-yielding, climate-resilient varieties of wheat, the region’s vital food staple.
The agreement was signed on 21 February 2024 at the Mexico headquarters of CIMMYT, a non-profit organization whose breeding contributions are present in half the maize and wheat varieties sown in low- and middle-income countries.
It comes at a time when severe drought threatens wheat crops in Southern Europe and North African nations such as Algeria, Morocco, and Tunisia and imports of wheat grain from traditional suppliers —Russia, the EU, Ukraine, and the US—are costly and constrained.
Since its formation in 1998 as a conglomerate of seed-producing cooperatives and a few industrial partners, Agrovegetal has been testing hundreds of CIMMYT breeding lines of bread and durum wheat (the latter used for pasta and couscous) and triticale (a wheat x rye hybrid) and returning high-quality data each year on the performance of this germplasm.
“The erratic rainfall, droughts, and crop disease patterns of Andalucía in southern Spain, where Agrovegetal tests the lines, are very much like those of North Africa, an important target region for CIMMYT genetics and agronomic solutions” said Bram Govaerts, director general of CIMMYT. “This new agreement, which guarantees the Agrovegetal-CIMMYT partnership through 2028, thus helps ensure CIMMYT’s capacity to offer outstanding, well adapted lines for the Mediterranean region, including North Africa’s national breeding programs, a great boon to farmers and consumers’ economies, food security, and nutrition.”
For its part, after several years of testing, Agrovegetal registers the most promising CIMMYT lines as improved varieties in Spain and markets their seed to members of its cooperatives.
“For us, the contributions of CIMMYT are invaluable,” said Ignacio Solis Martell, the company’s technical director. “Thanks to CIMMYT’s exceptional genetic material, Agrovegetal has become synonymous with resilience in Andalusia. Our varieties are renowned for their performance in the face of adversity, whether it be disease, drought, or other challenges.”
According to Govaerts, Agrovegetal offers an excellent model for burgeoning private seed enterprises in North Africa and elsewhere. “It shows how farmers, seed producers, and industry can join forces, skills, and resources to control seed, a critical factor in food production.”
With generous support from USAID, CIMMYT, in collaboration with the lead organization World Food Programme and partner organizations SNV, Tree of Life, and MTDC, has significantly enhanced climate resilience in Zimbabwe through the promotion of conservation agriculture practices under the Zambuko Livelihoods Initiative initiated, since 2020.
CIMMYT and ICBA sign a memorandum of understanding. (Photo: ICBA)
Dubai/Mexico City, 10 January 2024 – 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.
“Farmers 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,” said Bram Govaerts, director general of CIMMYT. “ICBA brings enormously valuable expertise and partnerships to efforts that will help them.”
The specifics of the two centers’ 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 world’s largest collections of germplasm of drought-, heat- and salt-tolerant plant species.
“We 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 farmers’ food security and nutrition, while enhancing water security and environmental sustainability, and creating jobs and livelihoods in different parts of the world,” 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 world’s 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 UAE’s 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 tomorrow’s 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.
New drought-resistant sorghum varieties bring hope for farmers in Africa
Scientists have identified drought-resistant, high-yielding sorghum genotypes that have the potential to revolutionize agriculture in dry regions of Africa. Sorghum, a staple food for millions in sub-Saharan Africa, has long been threatened by devastation from drought.
But now, researchers from the African Centre for Crop Improvement, the Institute of Agricultural Research (IAR), the International Maize and Wheat Improvement Center (CIMMYT), and the University of Life Sciences have discovered genetic resources that thrive under adverse conditions, yielding promising results and providing hope for a future that is more sustainable.
The study looked at 225 sorghum genotypes in various conditions, including non-stressed conditions and pre- and post-anthesis drought stress. The researchers used advanced statistical analysis, such as the additive main effects and multiplicative interaction (AMMI) method, to identify the most resilient and high-yielding genotypes.
The results revealed a vast diversity in the genetic resources of sorghum and provided a pathway for selecting promising genotypes for regions prone to drought. In addition, the study highlighted the significant impact of environmental conditions on grain yield, with genotypes showing variable responses to different growing environments.
A farmer inspecting sorghum on his farm in Tanzania. (Photo: CBCC)
For example, genotypes G144 (Kaura Short Panicle-1) and G157 (Kaura Mai Baki Kona) displayed higher grain yield in drought-stressed environments and were among the top performers. Not only do these genotypes outperform registered cultivars, but they also possess traits valued by farmers, making them ideal candidates for future breeding programs. In addition to drought tolerance, genotypes G119 and G127 displayed remarkable stability and high yield under non-stressed conditions, showing their potential as all-around performers in a variety of environments.
Farmers in dry areas of sub-Saharan Africa that are characterized by pre- and post-anthesis drought stress stand to gain a great deal from these newly identified sorghum strains. Adoption of these high-yielding and drought-resistant genotypes could increase food production and strengthen farmers’ resilience against the effects of climate change.
The findings of these super sorghum genotypes offer farmers facing the challenges of climate change a glimmer of hope. By adopting these new drought-resistant strains, African farmers can improve their food security and strengthen their communities, paving the way for a more resilient and sustainable future.
Stewards Global, trading as Afriseed, is a Zambia seed systems intervention success story. Thanks to support from the International Maize and Wheat Improvement Center (CIMMYT) and other partners such as the United States Agency for International Development (USAID) and the Alliance for a Green Revolution in Africa (AGRA), Afriseed is transforming rural farmers’ livelihoods through supplying drought tolerant maize seed.
What began as a start-up in 2007 has since grown to be one of the leading companies in Zambia’s seed industry. “I started this company with a team of three people. We did not have much, but we had a compelling vision,” says founder Stephanie Angomwile. “Initially, we were multiplying and distributing legume seed to the market as we had observed the deficit where it was very difficult for any serious farmer to procure improved and high-performing seed.”
“Having set up the business, we were fortunate to get AGRA’s support to secure proper industrial premises where we could focus our operations and serve the Zambian market,” she explains. “Using a basic drum seed dresser, we were able to churn out 100 metric tons of seed per season, which was quite impressive considering how rudimentary our equipment was.”
At this point, USAID bought into their vision and furnished Afriseed with a processing plant that could handle, sort, treat, and package seeds for both legume and maize. The company then pivoted to working with maize seed, based off the observation that most farmers were obtaining yields lower than the genetic potential of existing varieties.
“To do so, it was quite clear that we needed an institution that could help us break into the maize seed industry dominated by large multinational seed companies,” Angomwile explains. “This led us to partner with CIMMYT, which is a partnership that still exists today and has enabled us to accelerate our market penetration strategy through providing us with high-performing drought-tolerant genetics which are growing in popularity among farmers.”
Stephanie Angomwile gives a tour to representatives from the USAID special envoy and CIMMYT during a visit to Afriseed. (Photo: Tawanda Hove/CIMMYT)
The impact of CIMMYT support
Since 2017, CIMMYT has been working with Afriseed to help smallholder farmers access new and improved varieties that are drought-tolerant and can withstand seasonal weather variations induced by climate change. “As CIMMYT, our role is not only to breed improved genetic material that farmers can take up, but also to support business development for the private sector through intensive capacity building programs that position such entities to be sustainable and to excel in the absence project support,” explains Hambulo Ngoma, an agricultural economist working with CIMMYT. The organization has provided Afriseed with two high performing varieties so far: AFS 635 and AFS 638. In addition, CIMMYT has supported Afriseed in stimulating demand within the smallholder farmer market through facilitating the establishment of demonstration plots and designing targeted seed marketing strategies.
During CIMMYT Director General Bram Govaerts’ recent visit to Zambia, Ngoma highlighted that the organization is aware that small-to-medium enterprises may be constrained with regards to marketing budgets and market development investments. “As such, when we are convinced that there is a business case and an opportunity for a food security transformation, we usually support promising entities such as Afriseed with knowledge and resources to stimulate demand,” he said. “This is of extreme importance as farmers growing old, recycled seed from ancient varieties need to transition to new, improved varieties.”
Govaerts said, “We are happy we could contribute to the success of Afriseed in our own small way and we hope our partnership will take you to the next level.”
Afriseed has since grown and now comprises nearly 200 workers: 90 permanent staff and 110 casual workers during the peak season. Production has surged to an excess of 10,000 metric tons per season and there is a growing customer base stretching throughout all regions of the country. Angomwile is very grateful to have had a partner like CIMMYT, which facilitated Afriseed’s membership to the International Maize Consortium (IMC), a global body that provides access to an expanded genetic pool bringing exposure to new genetic gains. “Being a member of IMC is definitely an advantage for us as an entity because the seed supply market is highly competitive,” she explains. “So, we can now quickly become aware of the new genetic materials available and ask our research and development team — established through the immense support from CIMMYT — to develop new varieties for our target market.”
Through a series of exchange visits and trainings, CIMMYT has mentored the research and development team who are now in a position to breed their own varieties without external support. “The number of farmers in high potential areas that are remotely located that are still growing recycled seed is still quite large,” says Peter Setimela, a seed systems specialist who was part of the mentoring team. “We need to continuously render extensive support to entities such as Afriseed such that the seed quality deficiency gap can be greatly reduced.”
As the rains have been in abundance during this 2022/23 season, there is high anticipation that farmers who have grown seed from reputable seed suppliers such as Afriseed, are set for a bumper harvest.
Cover photo: Afriseed staff preparing legume seeds for processing in Zambia. (Photo: Agricomms)
Isaiah Nyagumbo engages extension officers and host farmers on the water harvesting technologies under trial in Buhera district, Zimbabwe. (Photo: Tawanda Hove/CIMMYT)
As climate change effects intensify, new innovations that enable smallholder farmers to adapt are no longer an option but a necessity. Significant parts of Zimbabwe are semi-arid, receiving less than 600mm of rainfall per year. Smallholder farming communities in districts such as Buhera have embraced feed production and water conservation innovations deployed by the International Maize and Wheat Improvement Center (CIMMYT) as part of the Livestock Production Systems in Zimbabwe project (LIPS-Zim). The project, funded by the European Union and led by the International Livestock Research Institute (ILRI) and CIMMYT, champions the crop-related aspects of interventions and aims to increase livestock productivity in Zimbabwe’s semi-arid regions. The project specifically aims to promote increased adoption of climate-relevant innovations in livestock-based production systems and improved surveillance and control of livestock diseases. While focused on livestock, the project is based on the premise that the performance of the livestock sector depends heavily on crop husbandry. By the same token, the livestock sector has bi-products that directly impact the productivity of crops.
Zimbabwe is a country that is well suited to mixed farming systems. Most smallholder farmers have treated livestock and crop production as mutually exclusive, but the two enterprises can have a significant complementary effect on each other.
CIMMYT Cropping Systems Agronomist Isaiah Nyagumbo is leading the development of crop husbandry innovations aimed at increasing feed production that are poised to benefit smallholder farmers’ crop productivity and enhance the conditioning of livestock, especially cattle.
Despite extension recommendations for farmers not to grow maize in these regions, studies show that 60% of the arable land is still occupied by maize. This is due to maize’s popularity among farmers thanks to its diverse uses.
One solution is to support farmers with the most appropriate cultivars and most effective production technologies to help them be more resilient to climate change induced challenges. To contribute towards LIPS-Zim’s objective for increased feed production, CIMMYT scientists are testing and demonstrating the use of drought tolerant and nutritious maize varieties along with a wide range of leguminous species such as mucuna, dolichos lab-lab and cowpea, which are grown mostly as intercrops. Efforts are also being made to develop innovative water conservation options through reduced or no-till planting basins and tied ridging systems reinforced with different mulching options including conventional organic and synthetic artificial mulches. These are then being compared to traditional conventional mouldboard ploughing systems.
The Nyeketes, proud hosts of the CIMMYT water harvesting technology trial, in Buhera, Zimbabwe. (Photo: Tawanda Hove/CIMMYT)
So far, the results are exciting and helping farmers to see the productivity gains from applying different technologies. Mr. and Mrs. Nyekete, smallholder farmers who volunteered to work with CIMMYT on these innovations, are optimistic about widespread adoption once the trials are concluded as the technologies can suit different levels of investment by farmers.
“We have a lot of farmers visiting us as they observe a diversity of technologies on our plot. The artificial mulch concept is one which is very new, and farmers are curious as to how it works. They can observe for themselves that, especially when used with tied ridges, it is very effective in retaining moisture,” said Mr and Mrs Nyekete.
“The same applies to organic mulch. Government extension workers have, over the years, been encouraging us to plant our maize under the Pfumvudza conservation agriculture model, and in it is the use of organic materials as mulch. The level of compliance in areas such as Buhera has been low, where people practice Pfumvudza without fully applying all the principles, especially soil cover. The water conservation trials are providing evidence that when one dedicates themselves to mulching their crop, whether using organic or synthetic mulches, the maize productivity is comparatively higher. As you can see, the maize plots with these water harvesting technologies are showing high vegetative growth in comparison to conventionally planted maize.”
Over the years, there has been a slow adoption of new innovations emanating from scientific research usually conducted on research stations. The use of on-farm research trials and demonstrations helps smallholder farmers to participate in the research process and co-create technologies, which shortens the adoption period and stimulates adoption at scale. This approach enables more farmers, who are not hosts, to benefit from the technologies showcased in the trials and to observe and learn from the trials. As the saying goes, “seeing is believing” and farmers can choose the options most relevant to their own circumstances. As such, farmers can conclude for themselves which technologies bear results compelling enough for them to adopt.
Despite the artificial mulching technology demonstrating impressive results so far, Nyagumbo cautions that before the technology can be promoted at scale, more research, as well as proof of concept for these systems are needed.
“Firstly, we see that the quality of the material used has a big bearing on the ability to reduce evaporation from the soil. Secondly, some farmers have observed germination challenges due to the synthetic materials creating an attractive habitat for rodents that eat the maize seed before it germinates. Thirdly, the returns from such investments need to be justified by highly attractive economic returns arising from high yields that will also enable farmers to intensify their production systems by producing their food needs from much smaller areas. Further studies and analyses therefore need to be conducted,” said Nyagumbo.
“Furthermore, so far the idea of tied ridging combined with organic mulches also seems to offer a highly attractive option for farmers that will contribute to increased feed productivity from the enhanced grain and crop residues, since increased biomass output also means increased livestock feed availability.”
While breeding excellence is proving to be an effective method for responding to climate change through improved seed varieties and high-performance livestock breeds, new crop and livestock production technologies are required to complement the genetic gains from breeding. The crop production technologies being showcased in in Buhera along with drought tolerant and nutritious maize varieties and legumes, promise to be transformative for semi-arid regions for both crop and livestock systems.
Arun Kumar Joshi, CIMMYT Country Representative for India, CIMMYT Regional Representative for South Asia and Managing Director of the Borlaug Institute for South Asia (BISA), predicted a bumper year for wheat in India.
“The feedback so far I am getting is that there will be record production of wheat,” he said. “The reason is that the area of cultivation has increased. According to government estimates, wheat has been sown in more than 34 million hectares so far in this rabi season.”
Reasons for this include no current threat from locusts or diseases, appropriate levels of soil moisture and humidity, and farmers shifting to planting crops earlier, explained Joshi.
Mathuli drew attention to the innovations that are making her life easier, such as drought-tolerant maize seed varieties developed by the International Maize and Wheat Improvement Center (CIMMYT) and the Kenya Agriculture and Livestock Research Organization (KALRO). She also cited her mobile phone as a vital tool, allowing her access essential information, such as weather forecasts, market prices, and technical farming support.
“In sub-Saharan Africa, more than half of the population works in agriculture,” explains Gates. “Together, they produce about 80 percent of the continent’s food supply. And most of the people doing the backbreaking farm work—like the chores I performed—are women.”
In addition to managing her farm, Mathuli is a model farmer and Village Based Advisor with the Cereal Growers Association, encouraging other farmers to adopt new practices that will improve their productivity. “She is clearly doing a good job in this role because more than 90 percent of farmers in her area have embraced one of the new adaptation practices,” said Gates.
The planting of maize hybrid Wengkhar Hybrid Maize 1 (WHM-1) has helped farmers in the Mongar district of Bhutan double their maize yield.
WHM-1 was developed in partnership with the International Maize and Wheat Improvement Center (CIMMYT) and became the first maize hybrid to be released in Bhutan to combat the negative effect of increasing temperature or extreme heat events on maize.
The hybrid was designed with characteristics of heat and drought tolerance, as well as a resistance to stem and root lodging. It also had additional stay-green traits after cob maturity and produced a high yield.
The success of the implementation in Bhutan is leading to an increased production of WHM-1, which will aim to meet national demand and work towards country’s self-sufficiency.
Dechen Yangden is one of the smallholder beneficiaries in Tsakaling, a sub-district in Mongar in the east of the country, who have boosted their maize yield by planting WHM-1. “My attempt to grow WHM-1 has doubled my maize production compared to last season where I cultivated some other maize varieties (2.5 metric tons (mt) in one hectare (ha)),” she said.
Farmer holds up a maize cob of WHM-1 in Waichur hamlet, Mongor, Bhutan. (Photo: ARDC)
Farmers’ experiences of WHM-1
Since its official release in 2020, the national maize program based at Agriculture Research & Development Center (ARDC) started producing hybrid seeds and maintaining parental lines. To test the success of the ARDC’s work, planting was carried out in the Tsakaling and Waichur hamlets in Mongar districts, covering an area of six acres.
Maize farmers in Tsakaling shared that although the crop was affected by the insect fall armyworm during the early vegetative stage, the productivity of the crop was not affected, as it recovered at later stage.
Meanwhile, ARDSC Khangma carried out yield monitoring during the harvest, where WHM-1 yielded 5.8 mt ha-1, which is noticeable rise on the national average of 3.7 mt ha-1.
Following the conclusion of their harvest, farmers in the two localities shared their views on the newly released maize in order to review the effect of the implementation of WHM-1. Both sets of growers reported an improved performance from the use of WHM-1 and noted that, unlike other maize varieties, the hybrid has shorter and uniform plant height along with a higher resistance to lodging, which is an essential trait given the conditions it is grown in. Furthermore, the stay-green trait of the hybrid after maturity of cobs gave farmers an added advantage of green fodder, which can be used for feeding their cattle.
In Waichur, the growers found that this hybrid had a tight husk and fully filled kernels. They shared similar views to growers in Tsakaling, reporting positive lodging resistance in the hybrid.
Both communities expressed their interest in continuing to use WHM-1, given the availability and accessibility of the seeds. As a response, the National Maize Program at ARDC Wengkhar, is looking to deploy the newly released hybrid on a larger scale, which will ultimately contribute towards enhancing maize self-sufficiency in the country.
WHM-1 was developed through partnership of the National Maize Program at Wengkhar and CIMMYT under the Heat Stress Tolerant Maize for Asia (HTMA) project for germplasm and technical assistance and the Commercial Agriculture and Resilient Livelihoods Enhancement Program (CARLEP-IFAD/MoAF) for on-farm research and intensification.
Feasibility mapping for WHM-1 showed that its adaption stretches along the southern foothills and some parts of eastern district. The National Maize Program, sister research centers, and farmers are currently working on upscaling the seed production for intensification of national maize production to meet the domestic demands.
Cover photo: Women farmers tagging their first choice of maize crop, WHM-1, in Tsakaling hamlet, Mongor, Bhutan. (Photo: ARDC)
Harvest of hybrid WHM-1 maize. (Photo: ARDC)
This story is written by P.H. Zaidi of CIMMYT and Passang Wangmo and Tsheltrim Gyeltshen of the National Maize Program, ARDC Wengkhar, Bhutan.
“We’ve recently supported a new project which will be operating in a number of countries, including Zambia and Malawi, that will be coordinated by the International Maize and Wheat Improvement Center, and by the International Institute of Tropical Agriculture,” said Fowler.
“They’ll be establishing innovation hubs where they’ll bring together the best and most appropriate technologies and information to help small-scale farmers with a whole variety of issues that they confront. This will give the farmers access, for example in Zambia, to drought-tolerant maize, which they’re really clamoring for. This is maize which, on a year-in and year-out basis, on average will yield about 30 percent more, rotated with legumes, which provide protein and also enrich the soil and reduce the need for fertilizer. But also other technologies and assistance in establishing markets for those products and lengthening out the value chain so that farmers are not just – and small businesses are not just dealing with raw commodities but are taking those commodities and making something more valuable and more useful to a broader population.”
“Crossing elite lines with exotic material has its challenges,” said Matthew Reynolds, co-author of the study and leader of Wheat Physiology at CIMMYT. “There’s a well-recognized risk of bringing in more undesirable than desirable traits, so this result represents a significant breakthrough in overcoming that barrier and the continued utilization of genetic resources to boost climate resilience.”
These results can be used to improve crop resilience and food security in the face of the challenges posed by climate change, as well as emphasizing the importance of genetic diversity in key crops where selective breeding has reduced adaptability.
To test solutions that could mitigate the impacts of drought, the study used randomized control trials to test the impact of combining drought-resistant seeds and index insurance in Mozambique and Tanzania.
Results show that combining these two technologies expands their benefits: using the improved seeds reduces insurance costs, and having insurance to begin with counteracts the risk of adopting the seeds. Farmers who use both technologies have greater resilience to drought in the short- and long-term.
Demonstrating the benefits to farmers and informing the scaling-up of the solution-bundling approach was also found to be important.
Wheat constitutes as much as 60% of daily calorie intake in developing countries. However, rising temperatures caused by climate change is reducing farmers’ yields.
Matthew Reynolds, Wheat Physiologist, and Maria Itria Ibba, Cereal Chemist, share how their work contributes towards securing food security and nutrition by breeding new wheat varieties.
