Figure 4

Response of θB to divergent selection (VarZOPT=5) when (a) selection intensity is weak (ω2=50) and (b) selection intensity is strong (ω2=5) following different initial states. Divergent selection was preceded by one of three different initial states: neutral mutation–migration–drift equilibrium (solid line, scenarios 4 and 2), an initial phase of 100 generations of uniform selection (dashed line, scenarios 6 and 5) or an initial phase of 100 generations of weakly divergent selection (dotted line, scenarios 8 and 7). The lines represent the mean of 50 stochastic replicates, and the number of loci is 10.