Fig. 1From: Significant genomic introgression from grey junglefowl (Gallus sonneratii) to domestic chickens (Gallus gallus domesticus)Population structure analysis of samples in this study. a. PCA plot of samples in this study. The abbreviation of domestic chickens could be found in Additional file 1: Table S1. b. Phylogenetic tree of the samples in this study. c. Admixture results for K = 2, K = 7, K = 8 and K = 9Back to article page