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    Identification of QTL for perenniality and floral scent in cowpea (Vigna unguiculata [L.] Walp.)

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    Journal Article (1.031Mb)
    Date
    2020-04-28
    Author
    Lo, S.
    Fatokun, C.
    Boukar, O.
    Gepts, P.
    Close, T.J.
    Muñoz-Amatriaín, M.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Perennial habit and floral scent are major traits that distinguish domesticated cowpeas from their wild relatives. However, the genetic basis of these two important traits remains largely unknown in cowpea. Plant longevity, a perenniality-related trait, and floral scent, an outcrossing trait, were investigated using a RIL population derived from a cross between a domesticated and a wild cowpea. QTL analysis revealed three significant loci, one on chromosome 8 associated with plant longevity and two, on chromosomes 1 and 11, for floral scent. Genes within the QTL regions were identified. Genes encoding an F-box protein (Vigun08g215300) and two kinases (Vigun08g217000, Vigun08g217800), and involved in physiological processes including regulation of flowering time and plant longevity, were identified within the perenniality QTL region. A cluster of O-methyltransferase genes (Vigun11g096800, Vigun11g096900, Vigun11g097000, Vigun11g097600, and Vigun11g097800) was identified within the floral scent QTL region. These O-methyltransferase cowpea genes are orthologs of the Arabidopsis N-acetylserotonin O-methyltransferase (ASMT) gene, which is involved in the biosynthesis of melatonin. Melatonin is an indole derivative, which is an essential molecule for plant interactions with pollinators. These findings lay the foundation for further exploration of the genetic mechanisms of perenniality and floral scent in cowpea. Knowledge from this study can help in the development of new extended-growth cycle lines with increased yield or lines with increased outcrossing for population breeding.
    https://dx.doi.org/10.1371/journal.pone.0229167
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7630
    IITA Authors ORCID
    Christian Fatokunhttps://orcid.org/0000-0002-8428-7939
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1371/journal.pone.0229167
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Cowpea; Grain Legumes; Plant Breeding; Plant Health; Plant Production
    Agrovoc Terms
    Cowpeas; Vigna Unguiculata; Quantitative Trait Loci; West Africa
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    PLOS ONE
    Collections
    • Journal and Journal Articles4835
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