Figure 2.
Predicted number (no.) of loci with identical sequences in the two species in reference and resistance genes under different combinations of introgression rates (alleles moved from one species to another/generation), time to species split (T), population size (N), and recombination rates (r) based on coalescent simulations using fastsimcoal2 (Excoffier et al. 2013). The mutation rate was 4 × 10−9 in all simulations. A, C, E, G, I and K are reference genes, and B, D, F, H, J and L are resistance genes. 100 replicates were simulated for each parameter combination under an “isolation with migration” model. The gray horizontal lines show the number of loci observed with identical sequences in reference genes and the red horizontal lines show the number of loci observed with identical sequences in resistance genes. Box plots in gray represent introgression rates where the observations are not significantly different from the simulations under the given parameter sets.