Figure 2.

Frequency of mitochondrial D-loop haplotypes for all populations (map), mismatch distributions of three mtDNA haplotype groups (corners), and microsatellite genotypes (STRUCTURE assignment probabilities) along three transects A, B and C (barplots). Pie size is proportional to mtDNA sample size; approximate Bronze Age paleohydrographic system (rivers, coast line; Piovan et al., 2010) in purple; relative locations of the modern Po and Adige Rivers in blue (in purple for paleo-rivers) within bar plots; mismatch distributions: the dotted line shows the frequency distribution of the observed pairwise differences; the solid line shows the frequency distribution of the expected pairwise differences under the sudden expansion model.