Figure S2. Interpolated candidate gene distribution map for the candidate SNP Etr_4281 on chromosome 22. Allele proportions are color coded from low to high proportions of the A allele for Etr_4281 which was associated with large adult body size in the Columbia River. Body size associations with this locus were weak or inconsistent in other parts of the range. Further, the alternative alleles A and T were found to be fixed between Skeena and Fraser Rivers, B.C. and may indicate an unmeasured trait that is divergent between these river basins.