English: Prior (dashed line) and posterior (solid line) distribution of approximate Bayesian computation model parameters. Population sizes for Western group (NW), Eastern group (NE) and ancestral population (NA) are expressed as the absolute number of individuals and are assumed to be constant. Divergence time (Td) between Western and Eastern groups is expressed as the number of generations since divergence. Mean mutation rate for microsatellites µseq is expressed as the number of mutations per site per generation. PSSR is the parameter of the geometric distribution in a generalized stepwise mutation model for microsatellites. Mean mutation rate µseq for sequences is expressed as the number of substitutions per site per generation.