Figure 5.

F _ST values from Pool‐seq analyses (y‐axes) compared to those from previous individual SNP genotyping of the same SNP loci (x‐axes; data from Andersson, Jansson, et al., 2017 and L. Laikre & N. Ryman, unpublished data). Nei's F _ST computed as F _ST = 1−H _S/H _T was used for the previous SNP data, while for Pool‐seq, Nei's F _ST was computed using POPOOLATION v. 1.2.2. (a) Pairwise F _ST for 1,415 SNP loci for the introduced population (linear regression coefficient b = 0.81, r ²= 0.76, t = 68, p < 0.001). (b) Pairwise F _ST for 1,378 SNP loci for the naturally sympatric populations (linear regression coefficient b = 0.66, r ² = 0.21, t = 19, p < 0.001). The blue lines are linear regression trend lines, and the orange ones represent expected values with r² = 1. Histograms in the margins represent frequency distributions of F _ST values