Data from: Range wide parallel climate-associated genomic clines in Atlantic salmon

Clinal variation across replicated environmental gradients can reveal
evidence of local adaptation, providing insight into the demographic and
evolutionary processes that shape intraspecific diversity. Using 1773
genome-wide single nucleotide polymorphisms we evaluated latitudinal
variation in allele frequency for 134 populations of North American and
European Atlantic salmon (Salmo salar). We detected 84 (4.74%) and 195
(11%) loci showing clinal patterns in North America and Europe
respectively, with 12 clinal loci in common between continents. Clinal
SNPs were evenly distributed across the salmon genome and logistic
regression revealed significant associations with latitude and seasonal
temperatures, particularly average spring temperature in both continents.
Loci displaying parallel clines were associated with several metabolic and
immune functions, suggesting a potential basis for climate associated
adaptive differentiation. These climate-based clines collectively suggest
evidence of large scale environmental associated differences on either
side of the North Atlantic. Our results support patterns of parallel
evolution on both sides of the North Atlantic, with evidence of both
similar and divergent underlying genetic architecture. The identification
of climate associated genomic clines illuminates the role of selection and
demographic processes on intraspecific diversity in this species and
provides a context in which to evaluate the impacts of climate change.