Fig 4.
Results of Bayesian outlier detection analysis (a) within contact zone using 311 single nucleotide polymorphism (SNP) loci and (b) across hybrid zone, using 86 SNP loci. Estimate of Fst plotted against transformed P-values, where PO = p/(1-p). Loci (full circles) at the right of the vertical line showed significant deviations from neutrality.