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    Effectiveness of predictive markers for marker assisted selection of pro-vitamin A carotenoids in medium-late maturing maize (Zea mays L.) inbred lines

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    S18ArtGebremeskelEffectivenessInthomDev.pdf (815.4Kb)
    Date
    2018-01
    Author
    Gebremeskel, S.
    García Oliveira, A.L.
    Menkir, A.
    Adetimirin, V.
    Gedil, M.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Development of pro-vitamin A (PVA) biofortified staple crops has been promoted as an option for addressing vitamin A deficiency in humans. Recently, crtRBI, lcyE and zep1 genes of carotenoid biosynthesis pathway have been identified as contributors to PVA accumulation in maize endosperm. High phenotyping cost and narrow genetic base for these nutritionally important compounds have been regarded as the major challenges. We evaluated the fidelity of existing functional markers along with new markers for PVA carotenoids and assessed the diversity of 108 maize inbreds using SSR markers. Among the existing markers, crtRB1-5′TE and crtRB1-3′TE exhibited highly significant association with PVA whereas marker Zep-SNP(801), developed in this study, was associated only with α-carotene. Collectively, a substantial improvement in the PVA content, including β-carotene, was observed with increased number of total favourable alleles. Cluster analysis based on SSR produced two major groups, each with three and two sub-groups, respectively. The inbreds containing favourable alleles of the functional markers were present in all sub-groups. Finally, this genetically diverse inbreds with high PVA can be used in breeding programme using marker-assisted selection to enhance PVA content in maize hybrids and cultivars developed for lowlands in sub-Saharan Africa.
    http://dx.doi.org/10.1016/j.jcs.2017.09.001
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2288
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.1016/j.jcs.2017.09.001
    IITA Subjects
    Maize
    Agrovoc Terms
    Maize; Diversity; Carotenoids; Biosynthesis; Vitamin A
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Journal of Cereal Science
    Collections
    • Journal and Journal Articles4836
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