The foundation for a Vision for Adapted Crops and Soil (VACS) is capacity building: to boost adoption of opportunity crops, for nutritional security, diverse and climate-resilient cropping systems, to build healthy soils, a cohort of researchers and professionals is being supported to improve opportunity crops in Africa. Launched in October 2024 in Nairobi, Kenya, the VACS Capacity Project aims to train scholars and professionals in the latest plant breeding technologies. Professor Julia Sibiya, VACS Capacity Project Lead at CIMMYT, elaborates on how the project aims to contribute to the promotion, development and delivery of improved “crops that nourish” people, and the planet.
As part of the VACS Capacity Project, 30 Master and PhD students will be mentored by prominent experts in plant breeding. What support will they receive?
The students will be exposed to the latest technologies in plant breeding but will also learn from their mentors to deliver the VACS vision on opportunity crops and healthy soils.
The project also includes training of 40 mid-careers professionals. We want them to master the latest technologies and be able to apply them to develop improved opportunity crop varieties that will be used by farmers.
For maximum and long-term impact, the CIMMYT Academy, with the support of the Sustainable Agrifood Systems program, is developing gender-aware mentoring and curriculum on a wide range of topics, to directly address priorities of the 70 scholars and professionals. Expertise is being sourced at institutions such as Iowa State University, CIMMYT and African universities for robust e-learning modules on the entire plant breeding pipeline and seed systems, with materials updated and designed for the African continent.
What gaps does the VACS Capacity Project aim to address?
Today, in Africa, very few plant breeders and scientists working on plant improvement are focusing on the opportunity crops identified by VACS, such as finger millet, bambara groundnut, and amaranth. Most breeders focus on the main staples. This is why we want to build a critical mass of scientists who work on opportunity crops that are vital for food security and nutrition under climate change.
Besides increasing the critical mass of researchers working on the opportunity crops, we also want to bring up-to-date the skills of professionals in the breeding sector, which is a sector where technologies are evolving very quickly. Most of the approaches to crop improvement used today differ greatly from approaches used ten years ago, hence the request by many professionals to upgrade their skills.
In addition to the long-term training fellowships for Master and PhD students, we will provide targeted skills training to professionals, with short-term placements between one and six months in institutions where they can learn cutting-edge techniques that they will apply to opportunity crops.
The project is also designed to build networks and communities of practice around these crops, so people can collaborate in breeding and scaling efforts that are requested by farmers and consider market intelligence for impact pathways. This is in addition to exchanging knowledge and germplasm.
How does this project differ from other plant breeding capacity building projects?
The difference is that we will place professionals into institutions where they will be provided with hands-on training. We will work with universities, international research institutes, and the private sector, including seed companies. This is like offering internships to mid-career professionals who want to upgrade their skills or learn new ones.
Our approach also includes mentorships for both scholars and professionals. Mentors will be recruited from all over the world to assist the fellows in various aspects of their research journey. Last but not least, we hope to see researchers working with farmers so they can learn from each other.
What are the expected outcomes of reaching a “critical mass of plant breeders”?
The objective is to have sufficient breeders to implement crop breeding programs designed for opportunity crops. We also want to encourage them to apply modern techniques to improve opportunity crops and, this way, to contribute to the development of more nutritious plants that are grown in healthy soils. As I mentioned earlier, besides empowering scientists themselves, we also aim to create the conditions for effective collaboration and partnerships for the successful delivery of improved opportunity crop varieties, and this delivery will be accelerated by reducing the breeding cycle. Overall, it will allow us to scale up efforts towards opportunity crops worldwide.
Rice is a critical staple for food security and a key export crop for India. The study published in Nature Communications explores context-specific pathways for increasing rice production in India, focusing on sustainable intensification — boosting yields without harming the environment or farm profitability.
The research analyzed over 15,000 field records across seven major rice-producing states in India using advanced machine learning techniques. The study identified nitrogen application and irrigation as key factors limiting yields, particularly in Eastern India (Bihar and Uttar Pradesh). By targeting farms with nitrogen and irrigation deficiencies, the study projects that yield gains could more than triple compared to general recommendations. Specifically, farms suffering from co-limitation by both nitrogen and irrigation could see the most significant gains in productivity and profitability.
Four scenarios for sustainable intensification were evaluated, ranging from blanket application of current nitrogen recommendations to highly targeted interventions. The analysis showed that targeted strategies, focusing on farms with the greatest yield constraints, could significantly improve nitrogen use efficiency and result in greater yields and profitability without excessive resource use.
The study highlights the potential of data-driven, context-specific solutions for rice intensification in India, emphasizing that targeted interventions could offer both higher returns for farmers and better environmental sustainability. It suggests a move away from “one-size-fits-all” approaches towards more precise, farm-specific recommendations based on local conditions and data. This approach could help close yield gaps while aligning with sustainable development goals.
Partners at the AID-I exhibition booth (Photo: CIMMYT)
In Tanzania, the first week of August is all about agriculture. From August 1 to 8, agricultural fairs, also known as Nane Nanefairs, are held all over the country to recognize the contribution of farmers to the national economy. ‘Nane Nane’ in the local language means ‘eight eight,’ referring to August 8, which is celebrated as Farmers Day in the country.
Organized by the Agricultural Society of Tanzania, these fairs serve as a landmark event for agricultural stakeholders across the region. This year, the 31st edition of the fair was organized at the Nzuguni grounds in Dodoma. It saw 500 exhibitors, including smallholder farmers, agricultural enterprises, public and private sector entities, and government officials.
Themed ‘Embrace Visionary Leadership for Agricultural Transformation,’ the event emphasized the need for leadership commitment to sustainable agriculture, while highlighting the critical role of agriculture in Tanzania’s economic growth and food security.
TheSouthern Africa Accelerated Innovation Delivery Initiative (AID-I), funded by United States Agency for International Development (USAID) and implemented by CIMMYT, along with several partners, played a prominent role at this year’s fair. In addition to raising awareness of the innovative work being done, the fair provided a platform for AID-I and its partners to showcase a range of innovative agricultural technologies designed to address the specific needs of Tanzanian farmers. The event also enabled AID-I and its partners to interact directly with farmers and entrepreneurs, resulting in valuable feedback.
Celebrating the Success of AID-I Beneficiaries at Nane Nane
The Nane Nane fair was more than just a display of agricultural technologies. It was also a celebration of the successes of local entrepreneurs who had benefited from AID-I’s support.
Among them was Sarah Mashauri, an entrepreneur from the Tabora region, who ventured into the business world by producing and selling maize flour, both wholesale and retail. Starting with only one sack of maize and a loan of 100,000 Tanzanian shillings (approximately US$36), Sarah faced numerous obstacles, including regulatory challenges that resulted in the Tanzania Food and Drugs Authority confiscating her items. The AID-I project recognized her potential and resilience. She was equipped with a milling and dehulling machine, which significantly improved her business. “Before the AID-I project came into my life, I was struggling on my own,” she said. “The support, coupled with the extensive training they provided, enabled me to scale up my operations. I went from employing seven people to 35, and my business expanded significantly. I am now able to source raw materials easily from small-scale farmers, thanks to the networks and training provided by AID-I.”
Agatha Laiza, managing director of Seasoning Palate, a food products company operating under the brand name Tobi Product in Dar es Salaam, is another entrepreneur who benefited from AID-I’s support. Agatha specializes in peanut butter, crunchy nuts, and peanut oil. Her journey began in 1996 with a focus on food product processing. She later realized the potential in peanut production and shifted to adding value to peanuts, while also addressing the critical issue of aflatoxin contamination. With support from AID-I, Agatha was able to build solar dryers for farmers and provide them with high-quality seeds, significantly reducing the risk of aflatoxin in their crops. “The support from USAID, CIMMYT, and AID-I has been invaluable,” Agatha said. “They have helped us build confidence among our farmers, reducing ground nut loss and ensuring safe, quality produce. Our factory, which can process up to three tons of peanuts daily, now operates more efficiently and our products are safer and more reliable.”
Aithan Chaula, executive director of the Dodoma Agriculture Seed Production Association (DASPA), also benefited from the AID-I project’s support. Since beginning pigeon pea production in 2022, DASPA saw substantial growth in demand for pigeon pea seeds, partnering with ALSSEM, a local seed production company.
DASPA expanded its operations to produce quality declared seeds (QDS) and certified seeds, catering to a growing market. Aithan attributed their success to the strategic support from AID-I and partnerships with organizations such as CIMMYT and ALSSEM. “The collaboration allowed us to expand our production capabilities and reach more farmers across various regions,” he said. DASPA is currently working with approximately 20,000 farmers and plans to increase this number by distributing small seed packs and conducting field demonstrations.
“This year at Nane Nane, we were able to distribute small packs of pigeon pea seeds to approximately 1,200 farmers to plant and farm,” said Aithan. “This effort, supported by AID-I, ensures that pigeon pea cultivation becomes well-known and widely adopted by farmers, contributing to both food security and income generation.”
The U.SA Ambassador to Tanzania interacting with exhibitors at the AID-I exhibition booth (Photo: CIMMYT)
Dr. Michael A. Battle Sr., the United States Ambassador to Tanzania, paid a visit to the AID-I exhibition booth. He engaged with AID-I representatives and the exhibitors, praising their innovative efforts to advance climate-smart agriculture and enhance food security. “It’s a joy to be participating in Nane Nane, particularly because USAID is interested in assisting Tanzania not only to become food secure but also to help with East Africa’s food security and ultimately the continent’s food security,” said Ambassador Battle Sr. He added that it was fulfilling to see the entire value chain of agriculture and agribusiness involving young people and old people engaged in the process of making Tanzania wealthier and more food secure.
For AID-I and its partners, the fair was a crucial opportunity to highlight ongoing initiatives and foster new partnerships. Peter Setimela, the Legume Seed Systems lead for AID-I, emphasized the importance of such events. “Our work in accelerating innovative technologies and ensuring they reach the farmers is reliant on strong partnerships. We bring these technologies to farmers by strengthening local seed systems, connecting farmers to financial services and products, and providing advisory services,” he said.
CIMMYT Director General Bram Govaerts’ visit to The University of Queensland (UQ) on September 27, 2024, reinforced a long-standing partnership aimed at tackling global food security and sustainability challenges. For over 50 years, CIMMYT’s collaboration with Australian researchers has advanced wheat breeding, contributing significantly to Australia’s agricultural resilience. The visit emphasized expanding research on key crops like sorghum, millets, and legumes, while promoting sustainable practices and climate resilience in agriculture. This collaboration continues to drive innovations that benefit not only Australia but also regions across the Indo-Pacific and Africa.
At the UN General Assembly, the U.S. Department of State announced $5 million in food security assistance to advance the Vision for Adapted Crops and Soils initiative in Guatemala. Co-led by CIMMYT and FAO, it aims to enhance sustainable agriculture through innovative practices that improve soil health and crop diversity. This initiative, part of the U.S. Feed the Future program, will strengthen resilience to climate change and support Guatemala’s agricultural sector, directly benefiting the 1.6 million people dependent on farming. CIMMYT’s leadership ensures scientific expertise in crop and soil management is central to addressing food insecurity and malnutrition in the region.
Rebecca Benson, a 30-year-old mother of three from Igurusi village in Mbeya, Tanzania, is living proof of how small efforts against food loss can significantly impact people’s lives. Her journey unfolded during a recent USAID field mission in Tanzania for CIMMYT’s Southern Africa Accelerated Innovation Delivery Initiative (AID-I) project when we visited a grain storage facility operated by the Igurusi Agricultural Marketing Cooperative Society (AMCOS). This local cooperative provides storage facilities and connects rice farmers to buyers, ensuring their produce is preserved and marketed efficiently. The warehouse stores over 1,000 tons of paddy, which is dried, stored, and ready for market.
As we toured the warehouse, we noticed that between the collection and storage of produce, small amounts of paddy had spilled onto the ground. Although this might seem like a minor oversight, it quickly became clear that what could have been discarded as waste was, for some, a valuable resource.
Turning Food Loss into Livelihood
A few meters away, we noticed Rebecca winnowing paddy. Intrigued by the picturesque scene of wind blowing away chaff, we approached her and soon discovered her remarkable story. Initially shy, Rebecca gradually opened up to us and shared her story of resilience and great inspiration. Four years ago, Rebecca left a comfortable life for one filled with struggle. She had been in an abusive marriage but decided to rebuild her life after an altercation with her husband almost turned fatal.
“He would drink and become very violent. I had endured a lot but realized that he might one day kill me. I was very scared,” Rebecca narrated.
Starting life on her own and without access to her family’s land, she struggled to continue her rice farming, facing the overwhelming costs of leasing land and maintaining a farm. As her situation worsened, she found it increasingly difficult to provide for her children.
A happy Rebecca Benson winnowing paddy she collected from the ground at the Igurusi AMCOS (Photo: Maria Monayo, CIMMYT)
In her quest for survival, Rebecca began collecting waste paddy from spillage at the AMCOS warehouse. Initially, after threshing, it was just enough for her family to feed on, but she soon realized she could sell some of the rice to generate income. With the cooperative’s permission, she started collecting, cleaning, and selling the grains at Tsh 700 per kilogram. On average, Rebecca gathers over 20 kg of rice daily, which helps her pay rent, school fees, and feed her family. Although a tedious task to sift through the soil and rocks, Rebecca does it enthusiastically.
While she hopes to one day acquire land and return to farming, Rebecca remains grateful for the opportunity she has now. “It is hard work, and I want to improve my life and that of my children. I have not been able to save enough to lease land for farming, but that is my goal,” she said. The work also keeps her busy and has granted her independence from her abusive partner, allowing her to support her family on her own.
The Reality of Post-Harvest Grain Loss
In Sub-Saharan Africa, post-harvest grain loss amounts to millions of dollars in lost revenue and a reduction in food security due to inadequate storage facilities and improper handling during drying and transport. While AMCOS works hard to preserve crops and prevent large-scale food loss, the small quantities of spilled rice are an unavoidable consequence of handling large volumes. For Rebecca, however, these spilled grains represent a lifeline. Through her resourcefulness, she has turned what could have been wasted into an opportunity, providing her family with food and financial stability.
Soils are the bedrock for plant health and sustenance, but how do we protect and enhance them to maximize their nutritional potential? Years of conventional farming practices have left many soils depleted, raising urgent concerns about how to rejuvenate them. The recent El Niño event during the 2023/24 farming season in southern Africa, bringing extreme weather conditions—ranging from prolonged droughts to intense floods—has exposed the vulnerability of these soils. Poorly managed soils, already strained by years of excessive tillage and lack of cover, struggle to retain moisture under such stress, leading to crop failures even after rainfall.
However, conservation agriculture (CA) offers a vital solution. By improving soil structure and moisture retention, CA practices provide a lifeline for crops in challenging conditions. Recognizing this, CIMMYT scientists are actively promoting CA among smallholder farmers across sub-Saharan Africa, highlighting its critical role in sustaining soil health and resilience in the face of climate challenges.
Described as lumps of soil particles that bind together strongly, soil aggregates play a vital role in maintaining soil health, supporting plant growth, and sustaining agricultural productivity. Formed by the combined effects of biological, chemical, and physical processes, the structure and stability of soil aggregates are crucial for several soil functions—primarily water infiltration, root growth, and resistance to erosion. Soil aggregates consist of various soil particles, including sand, silt, clay, and organic matter. There are different types of soil aggregates, including macroaggregates (>0.25 mm) and microaggregates (<0.25 mm), with macroaggregates typically more stable and beneficial for soil structure and functions.
Demonstrating the value of soil aggregate stability
A CIMMYT researcher holding a soil aggregate from a CA field (CIMMYT)
Imagine three soil aggregate samples taken from the same field but under different management regimes—from virgin soil that has not been previously cropped, to land under conservation agriculture practices for the last 5 to 8 years, and soil conventionally ploughed annually before crop planting for many years. When these soil aggregates are gently immersed in clear water, stark differences can be noted. The aggregates from conventionally tilled soil, weakened by years of intensive cultivation, quickly disintegrate, turning the water murky and brown.
In contrast, the aggregates from virgin soil remain intact, preserving the water’s clarity even after several hours. The CA soil aggregates exhibit much better stability than those from the conventionally tilled soil but fail to remain as intact as those from the natural virgin soil. A simple lesson is drawn from this demonstration! Restoring degraded soils is a serious challenge. Even after 5 years of CA practices, soil organic carbon levels may only show modest improvement, and the aggregates, while more stable, still don’t match the condition of aggregates from virgin soil.
Soil recovery from a degraded state is a slow process that is not “a walk in the park.” Transitioning from conventional tillage to CA is challenging and slow, requiring years to rebuild organic matter and improve aggregate stability. Patience and careful soil management are vital, as degradation can occur rapidly, but recovery is a lengthy process. However, incorporating organic soil amendments like manure and compost, along with diversifying crops by introducing legumes such as cowpea, groundnut, soybean, mucuna, and pigeon pea, can accelerate this recovery. While degradation occurs rapidly, soil restoration demands a long-term commitment, but the rewards are worth the effort.
Exploring conservation agriculture as a source to improve soil health
Conservation agriculture is built on three key principles: reduced soil disturbance, permanent soil cover, and diverse crop rotation. Minimizing soil disturbance helps preserve soil structure, while permanent soil cover shields the soil against splash erosion and boosts microbial activity. Crop rotation enhances soil fertility, maintains aggregate structure, and disrupts pest and disease cycles. These principles are essential for soil recovery and the retention of organic matter.
Among these, permanent soil cover is often the most challenging for farmers to implement, yet it is critical for effective soil management. Demonstrating its importance, a simple test with water applied to soil samples with varying levels of cover illustrates splash erosion effects.
“Such a simple test mimics real-life conditions farmers face during rains. Soils without cover suffer significant erosion, while those with minimal or substantial cover show reduced erosion and improved water retention. This emphasizes the importance of maintaining permanent soil cover to foster microbial activity and enhance soil health,” highlighted Isaiah Nyagumbo, cropping systems agronomist.
In a nutshell, soil aggregate management is fundamental to climate resilience and agricultural sustainability. Through the adoption of conservation agriculture practices, smallholder farmers can significantly improve soil health, enhance water and nutrient retention, and increase crop resilience to climate stress. The journey from degraded to healthy soil is long and challenging, but with careful management and patience, the benefits are profound and lasting. By understanding and implementing these principles, farmers can build a more sustainable and resilient food system.
Rajendra in the maize field (Photo: Deepa Woli, CIMMYT)
Rajendra Kathariya, a 41-year-old resident of Joshipur-2 in Kailali district, far-west of Kathmandu, has transformed his life and that of his family of five through commercial agriculture. Despite many challenges, Rajendra has remained committed to achieving financial sustainability through enhanced farming practices. Over the last two years, his partnership with Nepal Seed and Fertilizer (NSAF) and CIMMYT, in collaboration with Nisrau Multipurpose Cooperative, a partner cooperative of NSAF, has been instrumental in his success.
Moving from traditional to modern farming
Previously, Rajendra cultivated cereal crops using traditional methods which often led to food crises for his family. However, he has now shifted to cultivating various crops throughout the year using modern farming techniques on his 1.02 ha of land and an additional 2.71 ha which he has leased.
“Before NSAF’s support, we only cultivated two crops per year. Now we harvest three crops and are considering commercial maize production,” Rajendra said.
Remarkable achievements in crop production
Last year, Rajendra cultivated rice on 3.72 ha, yielding 8.8 metric tons (t) worth NPR 250,000 (US $1,880.71). Similarly, he sold 3.8t of spring maize from 1.35 ha, earning NPR 110,000 (US $827.51). This year, he expanded maize cultivation to 2.03 ha, with an expected income of NPR 200,000 (US $1,504.57). His potato crop yielded 5.5t worth NPR 125,000 (US $940.35), with an additional 5.5t stored for future sale.
In addition to crops, Rajendra has established a pig farm, earning NPR 400,000 (US $3,009.13) in 2023 from selling pigs. He received a feed-making machine for pigs from NSAF, under its support to agribusiness Micro, Small and Medium Enterprises (MSMEs).
Embracing modern technology and techniques
Rajendra uses both organic and chemical fertilizers and follows improved farming techniques such as hybrid seeds, line sowing, and machinery use. He owns a mini tiller and rents other machinery as needed. This year, with support from NSAF, he used a drone to spray fertilizer on his spring maize, significantly reducing labor and time.
“I have viewed videos of drones spraying fertilizer but never imagined it happening on my spring maize land. As a demonstration, 0.57 ha was used for nano urea spraying. The task was completed within five minutes of the drone taking flight. Similarly, I was astonished to learn that a drone can cover 2.02 ha in a mere 20 minutes,” he shared.
Intercropping and future plans
Rajendra has also implemented intercropping, combining maize with legumes on a 0.10-hectare plot. “Spring maize-legume intercropping is productive and effective for farmers such as me. We can make a profit from legumes, as well as spring maize. I will continue using this practice in the future,” he said.
Financial investments and community impact
The profits from agriculture have helped Rajendra to manage his household comfortably. He can now provide education for his four children, manage household expenses, and also pay the loan that he had taken for his household expenses. In addition, he recently invested NPR 250,000 (US $1,880.71) to build a new pig shed. He also sells his produce in local markets at Joshipur, Kailali.
“I have travelled a long way from being a subsistence farmer to engaging in commercial farming. This shift from traditional to improved farming technologies has been made possible with the support of NSAF/CIMMYT. I am grateful for their assistance and encouragement,” Rajendra said.
Vision for sustainability
Rajendra’s story reflects his dedication and hard work. “I was working as a daily wage laborer in India, hoping to secure a promising future for my children. Today, I can achieve complete sustainability through agriculture and provide quality education and a better life for my children,” he shared.
Drone on maize field (Photo: by Shishir Sapkota, CIMMYT)
Mariam Salim with amaranth grain that is ready to harvest from her vegetable field. (Photo: World Vegetable Centre)
On Pemba Island, part of Tanzania’s Zanzibar archipelago, more women are engaging in vegetable production and value addition, bolstering household nutrition and income security. This movement is significant in areas where modern agricultural technology and awareness of nutrient-rich crops like amaranth—a vegetable high in fiber, protein, and essential micronutrients—are limited.
Mariam Salim, who lives in Mjini Ole village on Pemba Island, is among the women embracing amaranth cultivation. Along with 272 other farmers, 53% of whom are women, she attended a three-day training course on vegetable cultivation and value addition. Funded by the United States Agency for International Development (USAID), through CIMMYT under the Southern Africa Accelerated Innovation Delivery Initiative (AID-I) project, and implemented by the World Vegetable Center, the training covered good agricultural practices, as well as the cultivation and processing of grain amaranth into flour.
The training equipped Mariam with essential knowledge and skills to enhance her agricultural productivity and livelihood.
Sowing seeds for success
Participants received seed kits containing eight varieties of nutritious traditional African vegetables, including African eggplant, African nightshade, amaranth, cowpea, and Ethiopian mustard. Farming a diverse range of crops supports food security and improves community nutrition.
During the training, Mariam realized the potential of growing grain amaranth for seed production. “I discovered that I could produce my own seeds and amaranth flour,” she said. “This opened up new opportunities for me to take control of my farming practices and increase my self-sufficiency.”
Seed production is a vital part of sustainable agriculture, enabling farmers like Mariam to boost productivity, diversify crops, and adopt climate-smart practices. By venturing into seed production, Mariam not only gained a valuable skill but also contributed to conserving and propagating important crop varieties within her community.
Mariam now sells seeds to other farmers, providing her with a new income source while supporting the broader agricultural community by facilitating access to quality seeds. Since the training in July 2023, Mariam has harvested 150 kg of seeds, selling them per kilogram (kg), earning US $450 and enhancing her household income security.
Healthy choices for communities
As the first woman in her community to undertake such an endeavor, Mariam is inspiring other women to explore new farming and food processing opportunities. Through the AID-I project on Zanzibar Island, more than 500 women have started home gardening to access quality vegetables for family consumption and business purposes, introducing new crop varieties and increasing household vegetable consumption.
This light bulb moment underscores the transformative power of education and knowledge-sharing initiatives under AID-I. By providing farmers with information on vegetable grain production and value addition, the project fosters self-reliance and innovation in sustainable farming practices.
Mariam’s detailed description of her seed production process highlights her dedication to agricultural innovation and community health. “It takes three months to harvest seeds, so I must be patient and committed to nurturing healthy crops,” she said. “I must also be precise in caring for the seeds through harvesting, drying, tapping, and sifting.”
The World Vegetable Center promotes home gardening among women. More than 500 participants actively cultivate and process vegetables into nutrient-dense packs. By growing their own vegetables, these women access nutritious food for their families, generate income from surplus produce, and improve health and well-being within the community.
Mariam Salim’s light bulb moment came during a training session on amaranth grain, where she recognized the potential of producing her own seeds. (Photo: World Vegetable Center)
As the summer cultivation season began in May 2024, Fatima Hassan, a 52-year-old farmer from New Halfa, Kassala State, in eastern Sudan, faced an uncertain future. Like thousands of other farmers in her region, Fatima lacked the financial means to purchase seeds, fertilizers, herbicides, or even hire a tractor. The ongoing armed conflict in Sudan had severely disrupted agricultural activities, leaving farmers without the necessary resources to cultivate their land.
‘When I learned about the Sudan Food Security Initiative (SFSI), I was extremely happy. The support from the initiative has given me and my family renewed hope,’ Fatima said while tending to her groundnut farm.”
Fatima Hassan weeds her groundnut field cultivated with support from the SFSI. (Photo credit: Suliman Fadlalla/CIMMYT)
Under the aegis of the SASAS program, the USAID-funded SFSI was launched in May 2024 in response to Sudan’s food security challenges. Targeting over 50,000 farmers in the New Halfa scheme, the initiative aims to strengthen resilient food production systems by providing significantly subsidized agricultural inputs and technologies, ensuring that farmers can sustain and enhance their farming practices despite the ongoing conflict in the region.
Hamid Rahama expresses his gratitude to the tractor driver ploughing his land in New Halfa as part of the SFSI. (Photo credit: Suliman Fadlalla/CIMMYT)
Sowing seeds of optimism
‘Support from SASAS came at a critical time as the armed conflict spread into new areas across the country, de-risking the crucial summer planting season. Through the SFSI, we are enabling farmers to adopt improved technologies and inputs at more affordable rates, thereby enhancing Sudan’s domestic food production,’ said SASAS Program Chief of Party Abdelrahman Kheir.
The SFSI provides each farmer with a 70% subsidy on a comprehensive package that includes land preparation for 0.42 hectares (ha), improved seeds for groundnut and sorghum, crop protection supplies, fertilizers, and agricultural advisory services. This initiative has already resulted in the planting of 14,568 ha of sorghum and 5,882 ha of groundnut. The crops are showing promising signs, with germination progressing well across all cultivated areas.
‘We had lost all hope of benefiting during this cultivation season. The subsidized land preparation, seed purchase, and other inputs have given us a lifeline. In the past, I was not able to buy fertilizers and herbicides, so my sorghum production was poor. This time things have changed dramatically, and we are well-equipped for a good cultivation season,’ said Hamid Rahama, a farmer from northern Halfa. Hamid echoes the optimism shared by many farmers in the region.”
Focus on a sustainable and food secure ecosystem
One of the most significant aspects of the initiative is its focus on building a sustainable seed production system. In partnership with 120 farmers and a private seed company, 252 ha (189 ha of sorghum and 63 ha of groundnut) were established for seed production in New Halfa. The initiative is projected to yield 360 metric tons (t) of sorghum and 270 t of groundnut seeds, thereby enhancing the resilience of the local agricultural ecosystem.
The anticipated yields from these efforts instill a much-needed optimism in an otherwise challenging situation. For groundnuts, the expected yield is 4.5 t/ha, resulting in an output of 26,000 t, enough to meet the nutritional needs of over 1.2 million people. Likewise, the sorghum harvest is projected to reach 54,000 t, providing sustenance for approximately 720,000 people.
An agricultural expert from SASAS inspects the growth of groundnuts cultivated under the SFSI in New Halfa. (Photo credit: Suliman Fadlalla/CIMMYT)A farmer inspects the growth of his sorghum field in New Halfa cultivated with support from the SFSI. (Photo credit: Suliman Fadlalla/CIMMYT)
The bold sections indicate the changes made for grammatical correctness, including unit consistency and phrasing adjustments.
In addition to providing inputs, the SASAS program also addresses broader food security challenges by ensuring that farmers receive the necessary technical support throughout various agricultural operations. This includes the introduction of drought-tolerant sorghum varieties, which are showcased to farmers through field days and demonstration plots.
Despite the numerous challenges posed by the ongoing conflict in Sudan, CIMMYT and its partners involved in implementing the SASAS initiative remain undeterred. Although the ongoing armed conflict has compelled many local agriculture advisory companies to scale back their operations due to security and logistical difficulties, the teams remain committed to supporting Sudanese farmers and improving agricultural productivity, thereby contributing to Sudan’s overall food security.
‘We lost a significant number of improved seed production fields due to the conflict. Nevertheless, we ensured the provision of all necessary certified seeds for the SFSI, along with top-quality herbicides,’ said the CEO of Harvest Agricultural Company Isam Ali. He added that despite considerable challenges in transporting agricultural machinery due to security issues, the company completed all land preparations in a timely manner for farmers.
The early impact of SFSI is evident in the renewed hope and optimism among farmers in New Halfa, who are now better equipped to face the challenges of the summer cropping season and contribute to the nation’s food security. With the harvest dates approaching—November for groundnuts and December for sorghum—the initiative is on track to significantly enhance food production in the region, providing a lifeline to thousands of farmers such as Fatima and Hamid.
Packing improved sorghum seeds for delivery to farmers as part of the SFSI in New Halfa. (Photo credit: Suliman Fadlalla/CIMMYT)
Dr Sieg Snapp is Program Director, Sustainable Agrifood Systems, International Maize and Wheat Improvement Center (CIMMYT)
Climate change is upending weather patterns across Africa, presenting dire challenges for farming communities. In Zambia, the impact is particularly harsh. Agriculture is the lifeblood of the economy, with two-thirds of the country’s workforce employed in agriculture, and 78% of these workers are women.
The country faced a severe El Niño during the 2023/2024 season, causing a severe drought that devastated over 1 million hectares of cropland. The president declared it a national disaster. El Niño events typically result in catastrophic drops in crop yields, often reducing maize harvests by 30-40%. These events not only impact food security but also hinder economic growth, with the agricultural sector’s contribution to Zambia’s GDP dropping from 9.4% to 3.39%.
The devastating El Niño-induced drought in Zambia is starkly illustrated by the story of Melody Limweta, a 31-year-old farmer. She and her husband, Collins Manenekela, have seen their already fragile livelihood pushed to the brink by severe water shortages. Typically, they rely on dry season gardening and small-scale farming, including raising chickens, during the rainy season. However, the drought has dried up local water sources, making gardening impossible and sharply reducing their income. The couple’s practice of planting maize in the same field each year with recycled seeds and traditional methods has worsened their situation, as the El Niño-induced rainfall deficits have led to poor yields. Their primary source of food and income has withered in the field due to insufficient rainfall.
A consortium of partners led by the International Maize and Wheat Improvement Center (CIMMYT) have joined together as a rapid delivery hub for these challenging times, providing vital support to rural communities and families such as Melody and Collins. Farmers have a strong voice in this unique delivery mode. With support from the people of the U.S. government, the Southern Africa Accelerated Innovation Delivery Initiative (AID-I) is promoting access to drought-tolerant crops, climate-busting and nutritious legume seeds, agricultural advice and early warning systems to combat climate change. AID-I provides critical support to ensure that millions of smallholder farmers in the Haut-Katanga region of DR Congo, Malawi, Tanzania, and Zambia have access to information and innovations needed for gains in food production that help buffer drought, flood and rising food, fuel, and fertilizer prices.
Speed and Scale: planting drought-tolerant maize
The idea of the ADI-I as a rapid delivery hub is to make available innovations and agronomic information at both speed and scale. Traditional farming methods and crops struggle with climate extremes like El Niño, which bring prolonged dry spells and heatwaves. Drought-tolerant maize varieties offer a promising solution by enhancing agricultural resilience. These adapted maize varieties yield 30-50% more than traditional ones under drought conditions, as demonstrated in recent trials during El Niño periods. However, these improved varieties are only useful when in farmers’ hands.
Working with local partners, AID-I is scaling drought-tolerant maize varieties to help Zambian farmers manage unpredictable weather patterns. In the 2023/2024 season, approximately 27% of Zambia’s smallholder farmers saw a significant boost in their maize harvests, benefiting over 900 thousand people in drought-affected regions, owing to drought-tolerant maize varieties. Over six hundred thousand households planted drought-tolerant maize varieties and produced 235 thousand metric tons of maize, accounting for 19% of Zambia’s maize production in the 2023/2024 season. This is huge return, as only 10% of the maize-growing area being planted with these resilient varieties.
Crop diversification for family nutrition
In addition to drought-tolerant maize, studies indicate that diversifying with legume crops is crucial for managing weather extremes, especially droughts and for improving soil health. Planting legumes helps spread the risk with varied planting and harvest times, cushioning the impact of erratic rainfall on crop yields. Women can feed their families due to crops like peanuts that mature early and need less rainfall. The benefits are sustained over time, as combining legumes with cereals improves overall nutrition and soil health, even amid unpredictable weather.
To support this effort, AID-I linked over 2,000 farmers to high-quality seeds for groundnuts (peanuts) and soybeans. On average, each household harvested about 80 kg of groundnuts and 175 kg of soybeans, earning roughly $75 and $58, respectively. Collectively, this initiative produced about 205 metric tons of these crops, accounting for around 14.3% of Zambia’s total production in the drought-stricken season. Farmers had a voice in choosing which crop varieties to grow through a feedback system called ‘let’s chat’ where with an ordinary flip phone farmers could call in and learn from their neighbour’s recorded commentary and testimonials. For the first time ever, farmers could provide comments on which crops they preferred, providing a lifeline of communication with agritraders, government and agricultural advisors.
A recent assessment found that Zambian women made up 60% of those benefiting from cowpeas, 65% from groundnuts, 62% from soybeans, and 36% from drought-tolerant maize.
Forewarned is forearmed – early-warning systems
Weather information services, especially early warnings about upcoming droughts, are vital for helping farmers adapt to climate change. Accurate and timely weather forecasts enable farmers to make informed decisions about planting, resource use, and crop management. This reduces losses and boosts productivity. Research shows that access to climate information can significantly increase crop yields and incomes, with some farmers experiencing up to a 66% boost in yields and a 24% rise in income.
The forecast of an El Niño for the 2023/2024 season prompted an early warning campaign to raise awareness about the hazards associated with El Niño and provide response mechanisms for smallholder farmers. AID-I used an Interactive Voice Response platform hosted by Viamo, a global social enterprise that uses mobile technology to connect people to valuable information and services. This rapid El Niño advisory campaign reached over 500 thousand farmers, with 60% male and 40% female listeners, and 93% of them under 35 years old. The campaign provided crucial advice on planting schedules, drought-resistant crops, and water-saving techniques.
Additionally, AID-I established demonstration sites that showcased effective winter crop production methods and introduced over 2,000 farmers to innovative agricultural practices. These interventions significantly improved farmers’ ability to respond to the drought.
Looking ahead
Scaling the adoption of drought-tolerant maize, improved legumes, and timely advisories is vital to protecting Zambia’s agriculture from climate extremes. The introduction of an AID-I-supported digital advisory campaign in September 2023 was a turning point for farmers like Melody and Collins. By engaging with the content, they learned about improved seeds, crop rotation, and better agronomic practices, which helped them cope with ongoing challenges and protect their resources. Initiatives like this can help families on the margins survive and rebuild agricultural production faster.
AID-I’s impact on families like Melody and Collins shows that investing in rapid delivery hubs is crucial for building resilience in farming communities. Expanding such initiatives will ensure more smallholder farmers have access to the innovations needed to maintain or increase food production amid climatic challenges.
Additionally, studies by organizations like Springer and the American Geophysical Union highlight the importance of integrating rapid delivery hubs into mainstream agricultural programs to enhance climate resilience and food security. Therefore, this necessitates an open call for international development allies—including donors, governments, NGOs, and businesses—to incorporate initiatives like AID-I into broader agricultural agendas, essential for fostering resilience and ensuring the future stability of farming communities in Zambia and beyond.
*Dr. Sieg Snapp is a leading agricultural scientist, renowned for creating the “mother and baby” trial design, a global method that enhances farmer-researcher collaboration, improving genetics and soil management in 30 countries. As Program Director at CIMMYT in Mexico, she oversees sustainable agrifood systems research, leading a large team focused on supporting smallholder farmers in Latin America, Africa, and Asia. Her work emphasizes gender-aware, inclusive development and has fostered partnerships for sustainable agricultural practices. A Professor at Michigan State University with over 180 publications, Dr. Snapp has also significantly influenced agricultural policy and technology adoption in Africa. Her contributions have earned her numerous prestigious awards, and she holds a Ph.D. from the University of California Davis.
Melinda Smale’s groundbreaking work in agricultural economics, particularly her collaboration with CIMMYT, has played a pivotal role in advancing the understanding of crop diversity conservation. At CIMMYT, Smale worked with plant breeders and agronomists to analyze maize landraces and wheat genetic diversity, contributing to the development of strategies that support sustainable agriculture and food security. Her research has informed CIMMYT’s efforts to preserve biodiversity and enhance the resilience of farming systems, directly aligning with the organization’s mission to improve global food security through science and innovation.
Stakeholder collaboration to create a coherent digital agriculture framework, an ecosystem to promote digital agriculture, and local government participation emerged as top recommendations to bridge the gap between technology and agriculture during the International Digital Agriculture Forum, Nepal 2024, held in Kathmandu, Nepal.
The event themed “Innovate, Cultivate, Thrive: Advancing Agriculture with Digital Solutions” brought together global and local stakeholders to explore the transformative potential of digital solutions in Nepal’s agricultural sector.
The focus on addressing the digital divide in Nepal’s agricultural sector by sharing emerging technologies and innovations, generating research ideas to provide inputs to the upcoming digital agriculture strategy of Nepal National Digital Agriculture Strategy and Action Plan for Nepal, and promoting an inclusive and sustainable transformation in the agriculture and food systems of Nepal.
Over the course of two days, the event attracted 135 participants, including 11 international experts and 29 national experts and representatives. It was organized by the Nepal Seed and Fertilizer Project (NSAF) and implemented by CIMMYT, with support from the United States Agency for Agriculture Development (USAID) in partnership with Pathway Technologies & Services Pvt Ltd, Seed Innovation Pvt Ltd, and Kathmandu Living Labs Pvt Ltd.
Key highlights from the event
The forum included keynote presentations, success stories of ICT business practices, and panel discussions with global subject experts, industry leaders, government agencies and local agritech companies. The event also comprised breakout groups for in-depth discussions, and formal and informal networking opportunities.
In his welcome address, Country Representative for Nepal and Coordinator of NSAF Dyutiman Choudhary highlighted the impact of digital agriculture on Nepalese farmers through the NSAF project. He shared how, in partnership with GeoKrishi and PlantSat, farmers now stay more informed on various issues through mobile app, SMS, IVR, farmer advisory services, and crop insurance.
The opening session was chaired by Dr. Deepak Kumar Kharal, secretary, agriculture development, Ministry of Agriculture and Livestock Development (MoALD). Keynote speeches included a global perspective on digital agriculture by Prof. Athula Ginige from Western Sydney University, and national perspective by Ms. Shabnam Shivakoti, joint secretary MoALD.
Prof. Ginige presented on “Cultivating Innovation: Transforming Challenges into a Sustainable Digital Agrifood Future.” He highlighted the plight of 719 million smallholder farmers living below the poverty line and stressed the need to use digital opportunities such as IoT, AI, and big data to address challenges of food waste and climate change. He shared his experience in developing mobile platforms to improve the lives of smallholder farmers.
In her keynote address Shivakoti set the context of Nepal’s digital agriculture and the initiatives undertaken by the government. She highlighted how digital innovations such as virtual agriculture commodity market E-hatbazar, programs such as digital land record maintenance, remote sensing data, and digital apps like GeoKrishi are driving growth in Nepal’s agricultural sector. She also shared details about the draft National Digital Agriculture Strategy.
Judith Almodovar, acting director of the Economic Growth Office at USAID-Nepal, emphasized the importance of digital tools in enhancing productivity, efficiency and sustainability. She highlighted USAID’s investment through NSAF in digital innovations, such as seed and soil fertility management using digital tools.
“By leveraging advanced technologies such as the Internet of Things (IoT), big data analytics, and remote sensing, we can provide real-time insights, improve supply chain management, and increase farmers’ resilience to climate shocks,” she said.
The forum featured three technical sessions: innovations in digital agriculture; digital agriculture in action—policies and practices and; rapid fire presentations by seven Nepalese digital ag companies. Additionally, six local digital start-up companies displayed their products.
The closing session was chaired by Dr. Narahari Prasad Ghimire, director general of the Department of Agriculture, while Dr. Rajendra Prasad Mishra, secretary of Livestock Development, was invited as chief guest.
Recommendations from the forum
The discussions and deliberations led to a series of recommendations primary among which were the importance of stakeholder collaboration to create a cohesive digital agriculture framework and developing partnerships and ecosystems to support digital agriculture, including data governance and personalized advisory services for farmers. Participants also emphasized that local governments must be encouraged to lead agricultural digitization initiatives, including staff training and adopting IoT-based intelligent irrigation systems, sensor-based drip irrigation, and drone technology for monitoring crops and livestock. Digital input certification and QR-based agri-input verification (seed, breed, saplings, and fertilizer) tracking systems to enhance trust and transparency emerged as a critical factor. Participants agreed that it was necessary to design technical information, including emergency agricultural alerts, in various formats (text, video, audio) to accommodate farmers with lower levels of literacy.
The World Food Prize Foundation names CIMMYT’s former Deputy Director General for Research, Marianne Bänziger, and current post-harvest specialist in the Sustainable Agrifood Systems (SAS) program, Sylvanus Odjo, as two of its inaugural 2024 Top Agri-food Pioneers (TAP).
The TAP List, introduced by the Foundation in celebration of its 38th anniversary, highlights 38 innovators from 20 countries and six continents who are making groundbreaking contributions to food and agriculture. Working in a wide range of fields, including agriculture, agtech, nutrition, education and advocacy, these pioneers embody the spirit of innovation needed to address the challenges facing global food systems today.
Leading the way: Meet the Top Agri-Food Pioneers of 2024
Photo: CIMMYT
Sylvanus Odjo, one of the awardees, is a postharvest specialist focused on the development and implementation of postharvest practices to improve food security in rural communities. He leads a network of research platforms in Mexico, Central America, and Africa, working with collaborators to fill research gaps and provide key recommendations to farmers, the private sector, governments, and NGOs. Odjo holds an M.S. in Food Science and Nutrition and a Ph.D. in Agricultural and Biological Engineering, with his doctoral research focused on the effects of drying processes on maize grain quality.
Photo: CIMMYT
Marianne Bänziger, also recognized on the TAP list, received her Ph.D. in plant physiology from the Swiss Federal Institute of Technology (ETH) in Zurich, Switzerland, in 1992. She is the former Deputy Director General for Research at CIMMYT, where she coordinated efforts to develop drought-tolerant maize varieties for smallholder farmers, promoting innovative approaches such as stress breeding methods and participatory trials.
Throughout her career, she has held positions in both science and management. Bänziger has an impressive publication record, with more than 50 articles and book chapters in peer-reviewed international journals and books.
As the first cohort of the TAP List, this group of pioneers will grow annually to form a global network dedicated to fostering collaboration and shared learning across food systems. These pioneers will also be featured at the 2024 Borlaug Dialogue in Des Moines, Iowa, October 29 to 31.
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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