Results of selection analyses per branches.

For each region under study, branches showing positive selection, location of amino acid subregions involved and ORFs are indicated. For terminal branches, the name of the corresponding isolate is shown, whereas for internal branches the strain subjected to the selection event is indicated. Covarying positions detected in the previous analyses falling into the subregions providing a positive selection signature are shown in the last column. (P<0.0001 for all subregions).