Habitat variability correlates with duplicate content of drosophila genomes

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    The factors limiting the habitat range of species are crucial in understanding their biodiversity and response to environmental change. Yet the genetic and genomic architectures that produce genetic variation to enable environmental adaptation have remained poorly understood. Here we show that the proportion of duplicated genes (PD) in the whole genomes of fully sequenced Drosophila species is significantly correlated with environmental variability within the habitats measured by the climatic envelope and habitat diversity. Furthermore, species with a low PD tend to lose the duplicated genes owing to their faster evolution. These results indicate that the rapid relaxation of functional constraints on duplicated genes resulted in a low PD for species with lower habitat diversity, and suggest that the maintenance of duplicated genes gives organisms an ecological advantage during evolution. We therefore propose that the PD in a genome is related to adaptation to environmental variation.

    元の言語English
    ページ(範囲)3169-3179
    ページ数11
    ジャーナルMolecular biology and evolution
    29
    発行部数10
    DOI
    出版物ステータスPublished - 2012 10

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics
    • Molecular Biology
    • Genetics

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