Scatterplot of GWAS -log10(P) values for lake size and normalized FST values between benthic and limnetic species. 50-kb windows falling in different categories (non-significant, FST outlier, GWAS significant, double outlier) are indicated in colors and separated by dashed lines. Data points with green edges represent repeated FST outliers for the three benthic-limnetic species pairs (see also Figure 3A).