Figure 3. Model of selection, deme size (N) , migration rate (m), and generations in admixture modify the distribution ofFST values, FPR, and FNR in different degrees. Mode of selection modifies only FST and FNR, with strong genomic differentiation even without any need for selection. Underdominant selection and BDM incompatibilities increased FNR. Deme size influencedFST , FPR, and FNR. Small deme sizes showed higher rates of differentiation and large deme sizes produce significantly less false positives and false negatives. Migration rate influenced only FST and FPR, with low migration rates increasing genomic differentiation and generating more false positives. Old hybrid zones increasedFST values, FPR, and FNR, and specifically generate more false positives and false negatives. N.S. - No selection, Dir. – Directional selection, Und. -Underdominance, BDMI- Bateson–Dobzhansky–Muller incompatibility. See Supporting Information Figure S2 and S3 for a more detailed distribution ofFST , FPR and FNR.