Table 1. Results from the multivariate analysis of variance (MANOVA) on the effect of selection regime, test regime and their interaction on the genetic correlations between traits.

Source of variation	Pillai's trace	F	P
Selection	0.084(2)	8.6(14, 2716)	<0.01
Test	0.083(2)	8.4(14, 2716)	<0.001
Selection × test	0.25(4)	13(28, 2716)	0.66

For each selection and test regime we calculated multiple estimates of correlations between pairs of traits by the ‘jack-knife method'. We then ran principal component analysis (PCA) on genetic correlations between traits. The loadings of each principal component were used as response variables for the MANOVA. The MANOVA provided estimates of Pillai's trace and approximated F-values (F). Probability associated with the different sources of variations was obtained by a randomization process. P is probability associated with F-value. Degrees of freedom are given between parentheses.