Genetic diversity and population structure of a mini-core subset from the world cowpea (Vigna unguiculata (L.) Walp.) germplasm collection

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dc.creatorFatokun, C.
dc.creatorGirma, G.
dc.creatorAbberton, Michael T.
dc.creatorGedil, Melaku A
dc.creatorUnachukwu, N.N.
dc.creatorOyatomi, Olaniyi
dc.creatorYusuf, M.
dc.creatorRabbi, Ismail Y.
dc.creatorBoukar, O.
dc.date2018-10-30
dc.date2018-11-23T09:59:49Z
dc.date2018-11-23T09:59:49Z
dc.date.accessioned2026-06-27T16:06:03Z
dc.descriptionThe International Institute of Tropical Agriculture maintains the world’s largest collection of cowpea germplasm of over 15,000 accessions. A sub-set of 298 lines from the loosely composed mini core collection of 370 landraces were genotyped based on genotyping by sequencing (GBS). Ward’s minimum variance hierarchical cluster analysis, model-based ancestry analysis and discriminant analysis of principal component (DAPC) were carried out on this sub-set. Three clusters were identified by the different clustering methods. Principal component analysis further supported the three clusters especially when accessions are scattered along the axes of the first two principal components. The first two principal components explained a total of 22.30% of the variation. Cluster one comprises 115 accessions from the largest number of countries and has the highest gene diversity, heterozygosity and polymorphic information content (PIC) values. Cluster two is made up of 102 accessions, 90 percent of which are from West and Central Africa. Analysis of molecular variance shows that the most variation is among accessions and lowest among clusters. No cluster is made exclusively of accessions from a single country. Based on SNP markers, the sub set of cowpea mini core germplasm collection used in this study encompasses the diversity in the crop.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/98296
dc.identifier.urihttp://hdl.handle.net/123456789/122528
dc.languageen
dc.publisherSpringer
dc.rightsOpen Access
dc.sourceFatokun, C., Girma, G., Abberton, M., Gedil, M., Unachukwu, N., Oyatomi, O., ... & Boukar, O. (2018). Genetic diversity and population structure of a mini-core subset from the world cowpea (Vigna unguiculata (L.) Walp.) germplasm collection. Scientific Reports, 8, 1-10.
dc.subjectcowpeas
dc.subjectvigna unguiculata
dc.subjectfood security
dc.subjectfodder crops
dc.subjectgrain legumes
dc.subjectgene banks
dc.titleGenetic diversity and population structure of a mini-core subset from the world cowpea (Vigna unguiculata (L.) Walp.) germplasm collection
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)