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

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    U18ArtFatokunGeneticInthomNodev.pdf (1.208Mb)
    Date
    2018-10-30
    Author
    Fatokun, C.
    Girma, G.
    Abberton, M.T.
    Gedil, M.
    Unachukwu, N.N.
    Oyatomi, O.
    Yusuf, M.
    Rabbi, I.
    Boukar, O.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    The 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.
    http://dx.doi.org/10.1038/s41598-018-34555-9
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4641
    Non-IITA Authors ORCID
    Christian Fatokunhttps://orcid.org/0000-0002-8428-7939
    Michael Abbertonhttps://orcid.org/0000-0003-2555-9591
    Melaku Gedilhttps://orcid.org/0000-0002-6258-6014
    Ismail Rabbihttps://orcid.org/0000-0001-9966-2941
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.1038/s41598-018-34555-9
    Research Themes
    BIOTECH & PLANT BREEDING
    IITA Subjects
    Cowpea; Grain Legumes; Plant Breeding
    Agrovoc Terms
    Cowpeas; Vigna Unguiculata; Food Security; Fodder Crops; Grain Legumes; Gene Banks
    Regions
    Africa; Asia; East Asia; East Africa; West Africa
    Countries
    China; Kenya; Niger; Nigeria
    Journals
    Scientific Reports
    Collections
    • Journal and Journal Articles4836
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