Fig. 3

Allele frequency dynamics of alleles selected in the parental immigrant populations after imbalanced mixture. Since the selection targets cannot be mapped, all alleles increasing in frequency during 110 generations in the parental immigrant population are considered as beneficial alleles. A In the three replicates the frequency increase is stronger in highly differentiated pairs of evolved founder populations. The allele frequency change in the first period (up to generation 20, dark red) is stronger than in the second phase (generation 21-29, light red). In the founder populations no similar allele frequency change occurs during the same time. B This allele frequency increase occurs throughout the entire genome and is stronger in the early phase (up to generation 20, upper panel) than in the later generations (generation 21-29, lower panel)