Fig. 1.

Loci underpinning adaptive evolution in honey bees. Histogram of (A) the population-size scaled selection coefficient (γ) for 12,303 genes; γ ranges from −1.64 to 11.8, but we truncated the histogram at γ = 3 for readability. There are 88 genes with γ > 3. (B) Histogram of pairwise genetic differentiation (F_ST) between African and West European honey bees for 3,392,632 SNPs. F_ST histograms for the other five pairwise comparisons are found in Fig. S2. Areas in red represent outlier loci with signatures of adaptive evolution.