Ratio of nonsynonymous to synonomous mutation rate (dN/dS) values for putative virulence factors in the P. brasiliensis lineage.

dN/dS values are shown for the branches that lead towards P. brasiliensis groups as showed in Figure 1. dN/dS ratios are correlated with the strength of selection, where values >1 indicate positive selection, and larger values indicate stronger selection. The P value associated to each dN/dS ratio represents the significance of the Z-test for each branch. Genes that had dN/dS value above 1 and its Z-value was significant (*.