Fig. 1

Principal component analysis of swine longissimus metabolome using orthogonal contrasts. Metabolomes that may display independent clustering by PCA are labeled according to the identification code for the longissimus metabolome of individual pigs (USDA-017##). Tissue samples collected at 21 d of age from birth weight matched pairs of pigs were used in the analysis (8 littermate pairs). Comp.1 represents component one in the principal component analysis and accounts for 20.39% of the total variance. Comp. 2 represents component 2 in the principal component analysis and accounts for 14.97% of the total variance