Data from: Chromosome polymorphisms track trans‐Atlantic divergence and secondary contact in Atlantic salmon

Sarah J. Lehnert, Paul Bentzen, Tony Kess, Sigbjorn Lien, John B. Horne, Marie Clément & Ian R. Bradbury
Pleistocene glaciations drove repeated range contractions and expansions shaping contemporary intraspecific diversity. Atlantic salmon (Salmo salar) in the western and eastern Atlantic diverged >600,000 YBP, with the two lineages isolated in different southern refugia during glacial maxima, driving trans-Atlantic genomic and karyotypic divergence. Here, we investigate genomic consequences of glacial isolation and trans-Atlantic secondary contact using 108,870 single nucleotide polymorphisms (SNPs) genotyped in 80 North American and European populations. Throughout North America, we identified extensive...
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