Fig. 1

a Results of principal component analysis (PCA) of Berkshire, Landrace, and Yorkshire breeds. Eigenvector1 (x-axis) versus Eigenvector2 (y-axis). Both Eigenvector1 (15.7 % of the total variance) and Eigenvector2 (13.7 % of the total variance) indicate proportion of variance. b Summary of gene sets identified from statistical analyses (XP-EHH and XP-CLR) of Berkshire tested against Landrace and Yorkshire breeds