Exceptional Enlargement of the Mitochondrial Genome Results from Distinct Causes in Different Rain Frogs (Anura: Brevicipitidae: Breviceps)

Figure 3

Changes in the dN/dS ratio () among ranoid lineages. The estimated values of neobatrachian branches are shown (based on model 4 in Table 2). The tree topology is the same as those of the ML and BI trees reconstructed in this study. The constant (0.053) of nonranoid neobatrachian lineages was regarded as the background value. The estimated is shown on each ranoid branch. A high indicates the relaxation of purifying pressure. The branches for which values are lower (<0.053) and 1.5 times higher (>0.08) than the background are shown in blue and red colors, respectively. The frog taxa having mtDNAs exceeding >20 kbp and 28 kbp are also highlighted by orange and red colors, respectively.