Figure 2
The evolutionary models tested in the likelihood ratio tests and the numbers of the genes with rate changes, rate accelerations and rate decelerations for each lineage. Evolutionary models in which ω (dN/dS ratio) on a certain lineage (ω x ) assumed to be different from ω on other background lineages (ω0) are shown below each branch. ω x is the nonsynonymous/synonymous substitution rate ratio in the lineage X. The numbers of the genes with evolutionary rate accelerations and rate decelerations estimated by the likelihood ratio tests are shown in the circles drawn on each branch. For the lineage C and E, the numbers of the genes with evolutionary rate changes are shown.