FIG. 3. Population structure inferred from 25 in Systematics of the Stripetail Darter, Etheostoma kennicotti (Putnam), and the Distinctiveness of the Upper Cumberland Endemic Etheostoma cumberlandicum Jordan and Swain

FIG. 3. Population structure inferred from 25 microsatellite loci. (A) Hierarchical STRUCTURE analysis identifies 18 genetic clusters (K). Optimal K values for each round of hierarchical clustering are shown. (B) STRUCTURE results for K ¼ 6. Pie charts represent average ancestry coefficients for each sampling locality. The phylogeny is redrawn from Figure 2A.