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    Phenotypic and molecular assessment of genetic structure and diversity in a panel of winged yam (Dioscorea alata) clones and cultivars

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    Journal Article (2.131Mb)
    Date
    2019
    Author
    Agre, P.
    Asibe, F.
    Darkwa, K.
    Edemodu, A.
    Bauchet, G.
    Asiedu, R.
    Adebola, P.
    Asfaw, A.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    A better understanding of the structure and extent of genetic variability in a breeding population of a crop is essential for translating genetic diversity to genetic gain. We assessed the nature and pattern of genetic variability and differentiation in a panel of 100 winged-yam (Dioscorea alata) accessions using 24 phenotypic traits and 6,918 single nucleotide polymorphism (SNP) markers. Multivariate analysis for phenotypic variability indicated that all phenotypic traits assessed were useful in discriminating the yam clones and cultivars. Cluster analysis based on phenotypic data distinguished two significant groups, while a corresponding analysis with SNP markers indicated three genetic groups. However, joint analysis for the phenotypic and genotypic data provided three clusters that could be useful for the identification of heterotic groups in the D. alata breeding program. Our analysis for phenotypic and molecular level diversity provided valuable information about overall diversity and variation in economically important traits useful for establishing crossing panels with contrasting traits of interest. The selection and hybridization of parental lines from the different heterotic groups identified would facilitate maximizing diversity and exploiting population heterosis in the D. alata breeding program.
    https://dx.doi.org/10.1038/s41598-019-54761-3
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6936
    IITA Authors ORCID
    Paterne AGREhttps://orcid.org/0000-0003-1231-2530
    Robert Asieduhttps://orcid.org/0000-0001-8943-2376
    Patrick Adebolahttps://orcid.org/0000-0002-5155-6194
    Asrat Asfawhttps://orcid.org/0000-0002-4859-0631
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1038/s41598-019-54761-3
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Food Security; Plant Breeding; Plant Production; Yam
    Agrovoc Terms
    Yams; Food Production; Dioscorea; Dioscorea Alata; Food Security; Plant Breeding; Yields; Dna; West Africa; Genetic Structures; Genetic Variation
    Regions
    Africa; West Africa
    Countries
    Ghana; Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Scientific Reports
    Collections
    • Journal and Journal Articles4835
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