Bayesian phylogram of Rodentia. Phylogenetic relationships are inferred from the reduced-concatenated dataset. Numbers at nodes refer, from left to right respectively, to bootstrap percentages in ML analysis with RAxML (100 replications), to posterior probabilities in Bayesian analysis and to bootstrap percentages in MP analysis with PAUP (1000 replications). Only nodes not supported by posterior probabilities of 1.00 or 100% BP are indicated. In both probabilistic analyses, dataset was analysed with the GTR + I + G model applied to 13 independent partitions (see text for details). Rodent family names are indicated on the right and grey upper case letters at nodes correspond to suprafamilial groupings as defined in Additional file 4.