Genetic progress in cowpea [Vigna unguiculata (L.) Walp.] stemming from breeding modernization efforts at the International Institute of Tropical Agriculture

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dc.creatorOngom, O.P.
dc.creatorFatokun, C.
dc.creatorTogola, A.
dc.creatorDieng, I.
dc.creatorSalvo, S.
dc.creatorGardunia, B.
dc.creatorMohammed, S.B.
dc.creatorBoukar, O.
dc.date2024-06
dc.date2024-10-17T07:49:08Z
dc.date2024-10-17T07:49:08Z
dc.date.accessioned2026-06-27T16:03:34Z
dc.descriptionGenetic gain has been proposed as a quantifiable key performance indicator that can be used to monitor breeding programs’ effectiveness. The cowpea breeding program at the International Institute of Tropical Agriculture (IITA) has developed and released improved varieties in 70 countries globally. To quantify the genetic changes to grain yield and related traits, we exploited IITA cowpea historical multi environment trials (METs) advanced yield trial (AYT) data from 2010 to 2022. The genetic gain assessment targeted short duration (SD), medium duration (MD), and late duration (LD) breeding pipelines. A linear mixed model was used to calculate the best linear unbiased estimates (BLUE). Regressed BLUE of grain yield by year of genotype origin depicted realized genetic gain of 22.75 kg/ha/year (2.65%), 7.91kg/ha/year (0.85%), and 22.82 kg/ha/year (2.51%) for SD, MD, and LD, respectively. No significant gain was realized in 100-seed weight (Hsdwt). We predicted, based on2022 MET data, that recycling the best genotypes at AYT stage would result in grain yield gain of 37.28 kg/ha/year (SD), 28.00 kg/ha/year (MD), and 34.85 kg/ha/year (LD), and Hsdwt gain of 0.48 g/year (SD), 0.68 g/year (MD), and 0.55 g/year (LD).These results demonstrated a positive genetic gain trend for cowpea, indicating that a yield plateau has not yet been reached and that accelerated gain is expected with the recent integration of genomics in the breeding program. Advances in genomics include the development of the reference genome, genotyping platforms, quantitative trait loci mapping of key traits, and active implementation of molecular breeding.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/155381
dc.identifier.urihttp://hdl.handle.net/123456789/121314
dc.languageen
dc.publisherWiley
dc.rightsOpen Access
dc.sourceOngom, P.O., Fatokun, C., Togola, A., Dieng, I., Salvo, S., Gardunia, B., ... & Boukar, O. (2024). Genetic progress in cowpea [Vigna unguiculata (L.) Walp.] stemming from breeding modernization efforts at the International Institute of Tropical Agriculture. Plant Genome, 17(2): e20462, 1-16.
dc.subjectcowpeas
dc.subjectgenetics
dc.subjectbreeding
dc.subjectyields
dc.subjectgrain
dc.subjectassessment
dc.subjectgenomics
dc.subjectgenotypes
dc.subjectafrica
dc.titleGenetic progress in cowpea [Vigna unguiculata (L.) Walp.] stemming from breeding modernization efforts at the International Institute of Tropical Agriculture
dc.typeJournal Article

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