FIG 3.

Phylogenetic tree estimated from Bayesian analysis of the M94 gene of murid CMV, including MCMV strains sampled in the European house mouse hybrid zone in this study, the two MCMV lab strains (Smith and K181), MCMV strains isolated from wild M. m. domesticus mice in Australia, and the Maastricht isolate of rat CMV (RCMV-M). The English isolate of rat CMV (RCMV-E) was used to root the tree. The main clades, indicated by brackets, are identified on the right. Numbers above branches represent Bayesian posterior probability/ML bootstrap support. The small scale bar represents the number of nucleotide substitutions per site. The larger scale bar represents the time in Mya.