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    The UCR Minicore: a valuable resource for cowpea research and breeding

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    Journal Article (2.740Mb)
    Date
    2021-06
    Author
    Munoz-Amatriain, M.
    Lo, S.
    Herniter, I.
    Boukar, O.
    Fatokun, C.
    Carvalho, E.
    Castro, I.
    Guo, Y.
    Huynh, B.
    Roberts, P.A.
    Carnide, V.
    Close, T.J.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Incorporation of new sources of genetic diversity into plant breeding programs is crucial for continuing to improve yield and quality, as well as tolerance to abiotic and biotic stresses. A minicore (the “University of California, Riverside (UCR) Minicore”) composed of 368 worldwide accessions of cultivated cowpea has been assembled, having been derived from the UCR cowpea collection. High-density genotyping with 51,128 SNPs followed by principal component and genetic assignment analyses identified six subpopulations in the UCR Minicore, mainly differentiated by cultivar group and geographic origin. All six subpopulations were present to some extent in West African material, suggesting that West Africa is a center of diversity for cultivated cowpea. Additionally, population structure analyses supported two routes of introduction of cowpea into the U.S.: (1) from Spain to the southwest U.S. through Northern Mexico and (2) from Africa to the southeast U.S. via the Caribbean. Genome-wide association studies (GWAS) narrowed several traits to regions containing strong candidate genes. For example, orthologs of the Arabidopsis FLOWERING LOCUS T lie within a major QTL for flowering time. In summary, this diverse, yet compact cowpea collection constitutes a suitable resource to identify loci controlling complex traits, consequently providing markers to assist with breeding to improve this crop of high relevance to global food and nutritional security.
    https://dx.doi.org/10.1002/leg3.95
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7159
    IITA Authors ORCID
    Christian Fatokunhttps://orcid.org/0000-0002-8428-7939
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1002/leg3.95
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Cowpea; Food Security; Genetic Improvement; Grain Legumes; Nutrition; Plant Breeding; Plant Genetic Resources; Plant Production
    Agrovoc Terms
    Cowpeas; Genomics; Plant Breeding; Grain Legumes; Quantitative Trait Loci; Food Security; Nutrition
    Regions
    Africa; Latin America; North America; West Africa
    Countries
    Mexico; Nigeria; United States of America
    Hubs
    Eastern Africa Hub; Headquarters and Western Africa Hub
    Journals
    Legume Science
    Collections
    • Journal and Journal Articles4835
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