Figure 3. Population structure analysis of 3,820 neutral and 24
outlier SNPs for the intertidal gastropod Nucella lapillus in the
UK and Ireland. (A) Heatmap based on pairwise FST values
across sampling sites (neutral SNPs = below diagonal; outlier SNPs =
above diagonal). Non-significant pairwise comparisons are indicated with
a black dot (P>0.001). The distribution of population
structure for K=5 (D) and K=11 (B) neutral genetic clusters, and K=7 (E)
and K=8 (C) adaptive genetic clusters identified using TESS3 (B-C), and
DAPC (D-E). Online version in colour.