Fig. 3: Maximum likelihood (ML) trees based on the whole mitochondrial sequences of Mus musculus.

The phylogroups represnt the two subspecies groups of M. m. musculus (MUS) (a) and M. m. castaneus (CAS) (b). The sublineages MUS-1 and CAS-1, which were responsible for the eastward movements, are shown with their major haplogroups. Bootstrap support values >50% are indicated above the nodes. The colours of the vertical bars associated with the sample codes indicate the countries where the samples were collected.