Fig. 2.

Main factors affecting inversion polymorphism. Proportion of simulations ending in inversion polymorphism as a function of (A) time of inversion introduction (t_i) and (B) number of loci captured in the inversion (n_i). In A, t_i is given in time steps of the simulation, where each time step is a single generation between step 290 and 299 (1 year). Population size (crosses) is indicated on the right vertical axis as fold-increase relative to the minimum S₁ at step 290. Proportion of polymorphic simulations (circles) is indicated on the left vertical axis.