Fig. 2From: Population structure, genetic diversity, and selective signature of Chaka sheep revealed by whole genome sequencingAnalysis of the population structure in four sheep breeds. a Principal component analysis of 40 individuals. b Neighbor-joining tree of 40 individuals. c Bar plot of ancestry compositions by ADMIXTURE with the assumed number of ancestries (K = 2 and 3). CKA, Chaka sheep; OLA, Oula sheep; BYK, Bayinbuluke sheep and TAN, Tan sheepBack to article page