Fig. 4: Weightings of the first two principal components for each trait group.
From: Trade-offs in the genetic control of functional and nutritional quality traits in UK winter wheat
Trait groups were defined by hierarchical clustering for traits measured in each trial year. Arrows indicate the direction of trait weightings where traits with similar weightings for PC1 on the x axes are positively correlated. PC2 on the y axes show an example of higher order PCs that contrast effects that are orthogonal to PC1 overall trait correlations.
