highly significantP < 0.001
Comparisons of nuclear segments of the three species revealed significant differences ( Supplementary Figure 3 , Supplementary Table 5 ), in agreement with the highly significant effect of species on the length of all nuclear segments ( χ 2 2 = 29.19–103.26, P < 0.001), in addition to the interaction between region and species for segment 0 ( χ 2 6 = 17.83, P = 0.007).