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    Genetic diversity in bambara groundnut (Vigna subterranea (L.) verdc.) as revealed by phenotypic descriptors and DArT marker analysis

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    S11ArtOlukoluGeneticInthomDev.pdf (411.2Kb)
    Date
    2011-03
    Author
    Olukolu, B.A.
    Mayes, S.
    Stadler, F.
    Ng, N.Q.
    Fawole, I.
    Dominique, D.
    Azam-Ali, S.N.
    Abbott, A.G.
    Kole, C.
    Type
    Journal Article
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    Abstract/Description
    Genetic diversity of a Bambara groundnut germplasm representing accessions from 25 African countries, maintained at the International Institute of Tropical Agriculture (IITA; Nigeria) was evaluated based on seed patterns, qualitative characters, quantitative traits and Diversity Arrays Technique (DArT) markers. The study aimed at identifying important descriptors for germplasm conservation, validating the crop’s geographical centre of origin and facilitating the utilization of existing genetic resources. Frequencies and diversity indices of seven types of seed patterns, 12 qualitative and 28 quantitative traits were evaluated for 124 representative accessions and were analyzed by region to elucidate the geographic distribution of descriptor states. In addition, individual plant samples from a subset of 40 landrace accessions were analyzed by assessing 554 DArT markers. Both the phenetic tree constructed from the qualitative and quantitative descriptors and the population structure derived from DArT marker analysis suggested a relatively high genetic diversity among accessions. Higher genetic diversity was observed for the Cameroon/Nigeria region relative to other regions, in agreement with the hypothesis that this region is the centre of origin for Bambara groundnut. Use of an extensive and diverse range of germplasm and an approach that integrated morphological and quantitative descriptors with DNA markers that represent wide genomic coverage offered a powerful way to make inferences about crop germplasm, in support of crop-improvement programs.
    https://dx.doi.org/10.1007/s10722-011-9686-5
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2201
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s10722-011-9686-5
    IITA Subjects
    Biodiversity
    Agrovoc Terms
    Germplasm; Phylogeny; Population Structure; Vigna Subterranea
    Regions
    Africa; West Africa; Central Africa
    Countries
    Nigeria; Cameroon
    Journals
    Genetic Resources and Crop Evolution
    Collections
    • Journal and Journal Articles5283
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