Figure 2.

Population relationship and structure analyses of the five Chinese local sheep breeds from extremely dry (HT, YY, and KK) and humid (WD and HU sheep) environments. (A) Principal component (PC) analysis among the 96 sheep of the five breeds. (B) Maximum-likelihood tree reconstructed using the RAxML with the GTRGAMMA model followed by a correction for ascertainment bias. (C) Cross-validation errors across the 10 assumed ancestral genetic clusters among the five breeds. (D) Genome-wide admixture proportions at K = 3 among the 96 sheep of the five breeds.