By Sridhar Bhavani
The East African wheat breeding pipeline aims to improve wheat varieties and contribute to regional food security by ensuring a stable and resilient wheat supply. In 2022, CIMMYT, in partnership with the Kenya Agriculture and Livestock Research Organization (KALRO) established a Joint Breeding Program in Njoro, a town southwest of the Rift Valley in Kenya. This was one of the first integrated breeding pipelines between CGIAR and National Agricultural Research and Extension Systems (NARES) partners.
Over the last three decades, genetic trials of over 77 varieties have been conducted in several regions. In East Africa, an expanded testing network that spans over multiple research institutes in Kenya and Ethiopia has been established for Stage 1 and Stage 2 trials in network countries. This makes the pipeline a powerful driver of positive impacts, rapidly enhancing both farm productivity and production in target regions. In Kenya specifically, a genetic gain trial was conducted at two sites in 2023 with the Stage 1 trials evaluated across eight locations. These are being distributed to NARES partners to establish correlations between the breeding site in Kenya and the Target Population of Environments (TPEs) in the E&SSA regions. This breeding pipeline demarcates the population improvement from product development. Other areas in the trials include the enhancement of genetic diversity to build resilience, adaptability, and quality enhancement to meet market and consumer demands.
The trial will continue in 2024 and 2025 to establish a baseline for genetic gains and to enable the assessment of the breeding pipeline’s progress in the coming years. The first cohort of pipeline materials (250 crosses) has been advanced to F2 generation and will be ready for distribution to E&SSA partners in 2025.
Accelerated breeding
The anticipation is that accelerated breeding techniques will be implemented in Kenya by incorporating a three-year rapid generation bulk advancement (RGBA) scheme aimed at diminishing the time necessary for variety development and release. This collaborative effort encompasses various activities, including joint crossing block, generation advancement, yield testing, and population improvement. The three-year RGBA scheme, coupled with data-driven selection utilizing advanced data analytics (GEBV, SI) and genomic selection approaches, is expected to play a pivotal role in facilitating informed breeding decisions in the East African region.
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