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    A multi-parent advanced generation inter-cross (MAGIC) population for genetic analysis and improvement of cowpea (Vigna unguiculata L. Walp.)

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    U18ArtHuynhMultiparentInthomDev.pdf (2.610Mb)
    Date
    2018-03
    Author
    Huynh, B.L.
    Ehlers, J.D.
    Huang, B.E.
    Muñoz Amatriarin, M.
    Lonardi, S.
    Santos, J.R.P.
    Ndeve, A.
    Batieno, B.J.
    Boukar, O.
    Cisse, N.
    Drabo, I.
    Fatokun, C.A.
    Kusi, F.
    Agyare, R.Y.
    Guo, Y.N.
    Herniter, I.
    Lo, S.
    Wanamaker, S.I.
    Xu, S.
    Close, T.J.
    Roberts, P.A.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Multi‐parent advanced generation inter‐cross (MAGIC) populations are an emerging type of resource for dissecting the genetic structure of traits and improving breeding populations. We developed a MAGIC population for cowpea (Vigna unguiculata L. Walp.) from eight founder parents. These founders were genetically diverse and carried many abiotic and biotic stress resistance, seed quality and agronomic traits relevant to cowpea improvement in the United States and sub‐Saharan Africa, where cowpea is vitally important in the human diet and local economies. The eight parents were inter‐crossed using structured matings to ensure that the population would have balanced representation from each parent, followed by single‐seed descent, resulting in 305 F8 recombinant inbred lines each carrying a mosaic of genome blocks contributed by all founders. This was confirmed by single nucleotide polymorphism genotyping with the Illumina Cowpea Consortium Array. These lines were on average 99.74% homozygous but also diverse in agronomic traits across environments. Quantitative trait loci (QTLs) were identified for several parental traits. Loci with major effects on photoperiod sensitivity and seed size were also verified by biparental genetic mapping. The recombination events were concentrated in telomeric regions. Due to its broad genetic base, this cowpea MAGIC population promises breakthroughs in genetic gain, QTL and gene discovery, enhancement of breeding populations and, for some lines, direct releases as new varieties.
    https://doi.org/10.1111/tpj.13827
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3418
    Non-IITA Authors ORCID
    Christian Fatokunhttps://orcid.org/0000-0002-8428-7939
    Digital Object Identifier (DOI)
    https://doi.org/10.1111/tpj.13827
    IITA Subjects
    Cowpea; Genetic Improvement; Grain Legumes; Plant Genetic Resources
    Agrovoc Terms
    Legumes; Cowpeas; Vigna Unguiculata; Magic; Qtl; Flowering; Photoperiod; Genetic Resources
    Journals
    The Plant Journal
    Collections
    • Journal and Journal Articles4835
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