Figure 1

Geographical distribution of the Apodemus flavicollis (a) and A. sylvaticus (b) samples. The shaded zones correspond to the distribution area of each species in Europe respectively (as described by Schilling et al, 1986; Mezhzherin, 1997; Zagorodnyuk et al, 1997). Thick lines correspond to the main biogeographic barriers: the Pyrenees and the Alps. In (a), squares, triangles and circles correspond to clades A, B and C, respectively. White stars and diamond shape correspond to localities where haplotypes from the clades A and C or from B and C are mixed, respectively. See Table 1 for locality symbols. In (b), squares, triangles, white stars and circles represent localities where the clades 1a and 1b, 2a and 2b were found, respectively (see Michaux et al, 2003).