Ecological Divergence and the Origins of Intrinsic Postmating Isolation with Gene Flow

Figure 3

Numerical simulation results for the model with modifier with both epistatic trade-off and direct, divergent selection (Case 2, full model). Parameter values used: 𝑠=𝑠₁=𝑠₂=0.1;𝑡₁=𝑡₂=0.5𝑠. See Figure 2 for other details.

(a) Divergence at A locus

(b) Divergence at B locus

(c) Intrinsic Isolation (based on F ₂ hybrids)

(d) Barrier into Population 1

(e) Barrier into Population 2