Fig. 1From: Identification of candidate genomic regions for chicken egg number traits based on genome-wide association studyPCA plot of chicken populations in this study. Each color represents a breed and the abbreviations are as defined in Table 3. PC1, principal components one; PC2, principal components two. PC1 and PC2 explain 15.92 and 7.49% of the total variance (or 59.65 and 28.08% of the top three PCs), respectivelyBack to article page