Results of the codon selection analyses.

For each gene, the total number of codons, as well as those detected to be under negative, neutral or positive selection with both FEL and IFEL methods are given. The last column indicates the location of positively selected sites.*partial genes;**sites detected to be under positive selection by both FEL and IFEL methods;***FEL method detected position 2981, whereas the other two positively selected positions at the CP gene were detected with IFEL method.