Figure 4
The distribution of allele frequencies (P) across a zone that consists of a chain of 10 demes in the presence of unidirectional X1A2 sex-biased hybrid incompatibility. (a) A scenario with zero dispersal; here, demes receive parental contributions once, H1:H2 gradually changes from 1:0 to 0:1. (b) A scenario with long-range dispersal at a rate λ=0.01. In each generation, each deme receives inputs from both parental populations equal to 1% of the deme's maximum size and, at the same time, loses 1% of its offspring to migration. (c) A scenario with short-range dispersal at a rate λ=0.4. Each deme receives 20% of migrants from the adjacent deme on each side and loses 40% of the individuals to the adjacent demes (20% on each side). Here, B locus is not involved in the incompatibility and thus B1 would behave like the C1 allele. ht incomp, heterogametic incompatibility; ho incomp, homogametic incompatibility.
