Genomic changes underlying repeated niche shifts in an adaptive radiation

David A. Marques, Felicity C. Jones, Federica Di Palma, David M. Kingsley & Thomas E. Reimchen
In adaptive radiations, single lineages rapidly diversify by adapting to many new niches. Little is known yet about the genomic mechanisms involved, i.e. the source of genetic variation or genomic architecture facilitating or constraining adaptive radiation. Here, we investigate genomic changes associated with repeated invasion of many different freshwater niches by threespine stickleback in the Haida Gwaii archipelago, Canada, by re-sequencing single genomes from one marine and 28 freshwater populations. We find 89 likely targets...
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