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    Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12348/4471

    Distinguishing between Nile tilapia strains using a low-density single-nucleotide polymorphism panel

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    Abstract
    • Nile tilapia (Oreochromis niloticus) is among the most important finfish in aquaculture, particularly in Asia. Numerous genetically improved strains of Nile tilapia have been developed and disseminated through formal and informal channels to hatcheries, many of which operate at a relatively small scale in developing countries. The primary objective of this study was to assess the extent to which molecular genetic tools can identify different and interrelated strains of Nile tilapia in Bangladesh and the Philippines, two globally significant producers. A tool was developed using a low-density panel of single-nucleotide polymorphisms (SNPs), genotyping-by-sequencing and discriminant analysis of principal components (DAPC). When applied to 2,057 samples from 205 hatcheries in Bangladesh and the Philippines, for hatcheries where the hatchery-identified strain was one of the sampled core populations used to develop the tool, hatchery-identified and DAPC-assigned hatchery-level strains were in agreement in 74.1% of cases in Bangladesh and 80.6% of cases in the Philippines. The dominant hatchery-identified and DAPC-assigned strains were GIFT, in Bangladesh, and GET-ExCEL—a composite strain partially derived from GIFT—in the Philippines.
    • External link to download this item: https://dx.doi.org/10.3389/fgene.2020.594722
    Collections
    • Sustainable aquaculture [1847]
    Date
    • 2020
    Author
    • Hamilton, M.G.
    • Curtis, L.
    • Barman, B.K.
    • Velasco, R.
    • Danting, J.
    • Benzie, J.
    Author(s) ORCID(s)
    • Matthew Gray Hamiltonhttps://orcid.org/0000-0001-8098-8845
    • Benoy Kumar Barmanhttps://orcid.org/0000-0003-0554-2207
    • John Benziehttps://orcid.org/0000-0001-9599-8683
    Subject(s)
    • fish seed; nile tilapia; discriminant analysis of principal components (dapc); strain identification
    AGROVOC Keywords
    • aquaculture; breeding; single nucleotide polymorphism; genetic improvement; genetics; tilapia; oreochromis niloticus; discriminant analysis
    Type
    • Journal Article
    Publisher
    • Frontiers Media
    Metadata
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