FIGURE 3 | Score and contribution plots following OPLS-DA predictive of the phu line. (A) Score plots following OPLS-DA (training dataset) with the chicken lines ascategorialfactorYandthelipidsasexplanatoryquantitativevariablesX.ThepHu+andpHu − individualswererepresentedbyblueandgreencircles,respectively.The model (M1b) contained 68 lipids, 1 predictive and 3 orthogonal components and its descriptive and predictive performance were R 2 Y (cum) = 0.77 and Q 2 (cum) = 0.67. (B) Contribution plot indicating the contribution of the lipids identi fi ed in the OPLS-DA predictive of the pHu lines.