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    Genome-culture coevolution promotes rapid divergence of killer whale ecotypes

    Access Status
    Open access via publisher
    Authors
    Foote, A.
    Vijay, N.
    Avila-Arcos, M.
    Baird, R.
    Durban, J.
    Fumagalli, M.
    Gibbs, R.
    Hanson, M.
    Korneliussen, T.
    Martin, M.
    Robertson, K.
    Sousa, V.
    Vieira, F.
    Vinar, T.
    Wade, P.
    Worley, K.
    Excoffier, L.
    Morin, P.
    Gilbert, Thomas
    Wolf, J.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Foote, A. and Vijay, N. and Avila-Arcos, M. and Baird, R. and Durban, J. and Fumagalli, M. and Gibbs, R. et al. 2016. Genome-culture coevolution promotes rapid divergence of killer whale ecotypes. Nature Communications. 7.
    Source Title
    Nature Communications
    DOI
    10.1038/ncomms11693
    School
    Department of Environment and Agriculture
    URI
    http://hdl.handle.net/20.500.11937/29934
    Collection
    • Curtin Research Publications
    Abstract

    Analysing population genomic data from killer whale ecotypes, which we estimate have globally radiated within less than 250,000 years, we show that genetic structuring including the segregation of potentially functional alleles is associated with socially inherited ecological niche. Reconstruction of ancestral demographic history revealed bottlenecks during founder events, likely promoting ecological divergence and genetic drift resulting in a wide range of genome-wide differentiation between pairs of allopatric and sympatric ecotypes. Functional enrichment analyses provided evidence for regional genomic divergence associated with habitat, dietary preferences and post-zygotic reproductive isolation. Our findings are consistent with expansion of small founder groups into novel niches by an initial plastic behavioural response, perpetuated by social learning imposing an altered natural selection regime. The study constitutes an important step towards an understanding of the complex interaction between demographic history, culture, ecological adaptation and evolution at the genomic level.

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