Fig. 5.

Evolutionary origins of the genome-wide SNPs and the differentiation (F_ST) outlier-region SNPs between the sister taxa, G_H1 and N. The Top figure illustrates the allele state in taxa outside of Hawaii Island for a site that is polymorphic across the sister pair G_H1 and N and four possible evolutionary scenarios (classes) that can result in the polymorphism. The Bottom figure shows the proportion of variants identified within the G_H1-N differentiation outlier regions that are designated to each class. Numbers within the bars represent the total number of genome-wide SNPs that fall within each class. *** indicates P < 0.001 after Fisher’s exact test.