Fig. 2

Population structure and relationships of African in comparison to commercial cattle. a Principal component (PC) analysis, PC 1 against PC 2. b Proportion of ancestry for each individual assuming different number of ancestral population (K = 2, 3, and 4). Colors in each vertical line represent the likelihood proportion of an animal genome assigned to a source population. c Neighbor-joining tree of the relationships between the nine cattle breeds (101 animals). The scale bar represents the identity-by-state (IBS) score between pairs of animals. d Genome-wide distribution of nucleotide diversity in 50-kb non-overlapping window