Parameter estimates for branch and branch-site models (LBD).

NOTE – np is the number of parameters for each model, df is the degrees of freedom, while p is the proportion of sites in a given site class. Sites under positive selection are listed according to the site numbering of the H. virescens reference sequence, accession number AX383958.aNull model for test 1 of positive selection from Zhang et al.[44].bNull model for test 2 from Zhang et al.[44], a more stringent test of positive selection.*Significant (p-value