Fig. 1From: Genomic evidence for human-mediated introgressive hybridization and selection in the developed breedPopulation genetic structure of Beijing Black pig. (a) Principle component analysis for the first two PCs of 10 pig breeds. (b) Neighbor-joining phylogenetic tree constructed from SNV data among 10 populations. (c) Structure analysis with K assumed ancestral groups (K = 2–5)Back to article page