The genomic basis of evolutionary differentiation among honey bees

Functional categories depleted of genes under positive selection in each honey bee species and their most recent common ancestor. Spheres indicate GO terms depleted of positively selected genes, for which size represents the number of annotated genes and color intensity the significance (−log₁₀ of their FDR). The x-axis represents the normalized GO enrichment score divided by the number of annotated genes. Most of the GO terms depleted in genes under positive selection are found in the basal Apis branch and relate to transcription functions. No depleted GO term was found in A. dorsata. (BP) Biological process; (CC) cellular component; (MF) molecular function.