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    Genetic diversity and population structure of an African yam bean (Sphenostylis stenocarpa) collection from IITA GenBank

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    Journal Article (2.149Mb)
    Date
    2022-03
    Author
    Shitta, N.S.
    Unachukwu, N.
    Edemodu, A.
    Abebe, A.T.
    Oselebe, H.O.
    Abtew, W.G.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    African yam bean, AYB (Sphenostylis stenocarpa), is an underutilized legume of tropical Africa. AYB can boost food and nutritional security in sub-Saharan Africa through its nutrient-rich seeds and tubers. However, inadequate information on germplasm with desirable agro-morphological traits, including insufficient data at the genomic level, has prevented the full exploitation of its food and breeding potentials. Notably, assessing the genetic diversity and population structure in a species is a prerequisite for improvement and eventual successful exploitation. The present study evaluated the population structure and genetic diversity of 169 accessions from the International Institute of Tropical Agriculture (IITA) collection using 26 phenotypic characters and 1789 single nucleotide polymorphism (SNP) markers. The phenotypic traits and SNP markers revealed their usefulness in uniquely distinguishing each AYB accession. The hierarchical cluster of phenotypes grouped accessions into three sub-populations; SNPs analysis also clustered the accessions into three sub-populations. The genetic differentiation (FST) among the three sub-populations was sufficiently high (0.14–0.39) and significant at P = 0.001. The combined analysis revealed three sub-populations; accessions in sub-population 1 were high yielding, members in sub-population 2 showed high polymorphic loci and heterozygosity. This study provides essential information for the breeding and genetic improvement of AYB.
    https://dx.doi.org/10.1038/s41598-022-08271-4
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7494
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1038/s41598-022-08271-4
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Food Security; Grain Legumes; Nutrition; Plant Breeding; Plant Production
    Agrovoc Terms
    Sphenostylis Stenocarpa; Food Security; Nutrition; African Yam Bean; Phenotypic; Dna; Nigeria
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Scientific Reports
    Collections
    • Journal and Journal Articles4501
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