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    Diversity of water yam (Dioscorea alata L.) accessions from Cote d'Ivoire based on SNP markers and agronomic traits

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    Journal Article (971.5Kb)
    Date
    2021
    Author
    Bakayoko, L.
    Pokou, D.N.
    Kouassi, A.B.
    Agre, A.P.
    Kouakou, A.M.
    Dibi, K.E.B.
    Nzue, B.
    Mondo, J.
    Adebola, P.O.
    Akintayo, O.T.
    Asfaw, A.
    N'guetta, A.S.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Dioscorea alata (L.), also referred to as water, winged, or greater yam, is one of the most economically important staple food crops in tropical and subtropical areas. In Côte d’Ivoire, it represents, along with other yam species, the largest food crop and significantly contributes to food security. However, studies focusing on better understanding the structure and extent of genetic diversity among D. alata accessions, using molecular and phenotypic traits, are limited. This study was, therefore, conducted to assess the pattern of genetic variability in a set of 188 D. alata accessions from the National Agronomic Research Centre (CNRA) genebank using 11,722 SNP markers (generated by the Diversity Arrays Technology) and nine agronomic traits. Phylogenetic analyses using hierarchical clustering, admixture, kinship, and Discriminant analysis of principal component (DAPC) all assigned the accessions into four main clusters. Genetic diversity assessment using molecular-based SNP markers showed a high proportion of polymorphic SNPs (87.81%). The analysis of molecular variance (AMOVA) showed low molecular variability within genetic groups. In addition, the agronomic traits evaluated for two years in field conditions showed a high heritability and high variability among D. alata accessions. This study provides insights into the genetic diversity among accessions in the CNRA genebank and opens an avenue for sustainable resource management and the identification of promising parental clones for water yam breeding programs in Côte d’Ivoire.
    https://dx.doi.org/10.3390/plants10122562
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7319
    IITA Authors ORCID
    Paterne AGREhttps://orcid.org/0000-0003-1231-2530
    Patrick Adebolahttps://orcid.org/0000-0002-5155-6194
    Asrat Asfawhttps://orcid.org/0000-0002-4859-0631
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3390/plants10122562
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Plant Breeding; Plant Production; Yam
    Agrovoc Terms
    Dioscorea Alata; Genetic Diversity; Molecular Markers; Population Structure; Agronomic Trait; Yams
    Regions
    Africa; West Africa
    Countries
    Cote d’Ivoire (Ivory Coast)
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Plants
    Collections
    • Journal and Journal Articles4835
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