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Genome-wide association studies of photosynthetic and agronomic traits in cowpea collection

dc.contributor.authorSansa, O.
dc.contributor.authorAbberton, M.T.
dc.contributor.authorAriyo, J.
dc.contributor.authorPaliwal, R.
dc.contributor.authorIge, A.
dc.contributor.authorDieng, I.
dc.contributor.authorAyo-Vaughan, M.
dc.contributor.authorOlowe, V.I.
dc.contributor.authorOyatomi, O.
dc.date.accessioned2024-11-06T10:22:19Z
dc.date.available2024-11-06T10:22:19Z
dc.date.issued2024-10-04
dc.identifier.citationSansa, O., Abberton, M.T., Ariyo, J., Paliwal, R., Ige, A., Dieng, I., ... & Oyatomi, O. (2024). Genome-wide association studies of photosynthetic and agronomic traits in cowpea collection. G3: Genes, Genomes, Genetics, 1-20.
dc.identifier.issn2160-1836
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8631
dc.description.abstractExploring genomic regions linked with drought tolerance and photosynthesis in cowpea could accelerate breeding of climate-resilient cowpea varieties. A genome-wide association study (GWAS) was conducted to identify marker–trait associations for agronomic and photosynthetic traits measured under well-watered and water-stressed conditions. One hundred and twelve cowpea accessions from IITA were phenotyped for agronomic and photosynthetic traits across 3 locations in 2 years: Ibadan, Ikenne (2020 and 2021), and Kano (2021 and 2022). The accessions were genotyped using 19,000 Diversity Arrays Technology sequencing single-nucleotide polymorphism (SNP) markers from which 9,210 markers were utilized for GWAS analysis using BLINK and linear mixed model (LMM) in GAPIT. Results revealed significant accession × environment interactions for measured traits, while ΦPSII, ΦNO, and ΦNPQ had significant and consistent correlations with grain yield across conditions. GWAS identified 5 SNP markers having consistent associations with grain yield under well-watered and water-stressed conditions and 3 markers associated with ΦNPQ and ΦNO. Gene annotations revealed Vigun04g169000 and Vigun08g168900 genes linked with grain yield and highly expressed under water-stressed conditions have functional roles in regulating plant development and adaptive response to environmental stress. Vigun07g133400, Vigun07g132700, and Vigun07g258000 genes linked with ΦNPQ and ΦNO are involved in activities controlling photoprotection and stress-induced damage in plants. This study identified natural genetic variation in cowpea and correlations between photosynthetic traits and grain yield under real-field drought conditions. The identified SNP markers upon validation would be valuable in marker-assisted selection and useful for cowpea breeders to harness the role of photosynthesis in genetic enhancement of cowpea’s tolerance to drought.
dc.description.sponsorshipCrop Trust
dc.format.extent1-20
dc.language.isoen
dc.subjectGenome-Wide Association Studies
dc.subjectAgronomic Traits
dc.subjectCowpeas
dc.subjectFood Security
dc.subjectDrought Tolerance
dc.subjectPhotosynthesis
dc.subjectMarker-Assisted Selection
dc.titleGenome-wide association studies of photosynthetic and agronomic traits in cowpea collection
dc.typeJournal Article
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationFederal University of Agriculture Abeokuta
cg.contributor.affiliationUniversity of Ibadan
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCowpea
cg.iitasubjectFood Security
cg.iitasubjectGenetic Improvement
cg.iitasubjectGrain Legumes
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.journalG3-Genes Genomes Genetics
cg.notesOpen Access Journal
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.1093/g3journal/jkae233
cg.iitaauthor.identifierMichael Abberton: 0000-0003-2555-9591
cg.iitaauthor.identifierRajneesh Paliwal: 0000-0001-6493-3289
cg.iitaauthor.identifierIbnou Dieng: 0000-0002-1051-9143
cg.iitaauthor.identifierOlaniyi Oyatomi: 0000-0003-3094-374X
cg.futureupdate.requiredNo


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