Fig. 3.

—Positive selection detected in different lineages and internal nodes. We have detected the putative orthologous clusters under positive selection for eight species lineages and four internal nodes. The topology is built according to the tree of concatenated 4,042 clusters and the branches that have been tested are labeled in red. The numbers in orange indicate significant clusters identified using CodeML branch-site model with significant sites enclosed in brackets, whereas the numbers in blue are summarized using GA-branch method.