Figure 2. Equilibrium frequencies of allele A_i on the island population as a function of the migration rate.

There are three qualitatively different outcomes. Circles show a typical example for the case without local selection (s = 0), boxes for the case with local selection (s>0) but without nuclear incompatibilities (l _NI = 0), and triangles for the case in which both local selection (s>0) and nuclear incompatibilities (0<l _NI≤1) act. The critical migration rate of nuclear divergence (m _c,NI) is indicated by an arrow.