Figure 7: Subspecies differences in contact versus allopatric samples.

Box and whisker plots (showing medians, 25–75% and 10–90% ranges) compare expression levels of each mass peak, as a proportion of the total of all central MUP peaks in that sample, for each mass that showed a significant difference in expression between subspecies (statistical tests shown in Table 1). C: contact samples (solid fill), A: allopatric samples (hatched fill); d: domesticus (green), m: musculus (yellow). †Candidates for reinforcement; ††candidates for assortative mating (statistical tests shown in Table 2).