Figure 9.

Difference between $F_{ST}$ under neutrality and $F_{ST}$ under overdominance ($\Delta F_{ST}$), for different selective scenarios. For all scenarios shown here, we used an initial equilibrium frequency of 0.5 ($f_{eq}=0.5$), and varied population split times, size fold change ($N_t/N_0$), selective coefficient (s) and difference of equilibrium frequencies after split (δ). Notice that for the case of a small change in equilibrium frequency after the split ($\delta =0.1$), the $F_{ST}$ under neutrality is always greater then the $F_{ST}$ under divergent overdominance ($\Delta F_{ST}>0$ for every time after the divergence). For higher values of frequency difference ($\delta =0.2$) and selection coefficient ($s>0.05)$ the $F_{ST}$ under neutrality is smaller than the $F_{ST}$ under divergent overdominance ($\Delta F_{ST}<0$) for times closer to the split of the populations while for times far from the split the $F_{ST}$ under neutrality becomes greater then the $F_{ST}$ under divergent overdominance ($\Delta F_{ST}>0$).