Table 3.

Predictive ability and prediction accuracy for yield stability for each of the five cross-validation (CV) sets for random and family groupings of individuals, and mean and standard error (SE) for each grouping

Grouping	CV set	Predictive Ability	Prediction Accuracy (r)
Random	1	0.17	0.86
	2	0.08	0.38
	3	0.29	1.46
	4	0.03	0.15
	5	0.22	1.11
	Mean		0.79*
	SE		0.23
Family	1	0.09	0.43
	2	0.12	0.60
	3	0.06	0.30
	4	0.09	0.43
	5	0.10	0.50
	Mean		0.28 NS
	SE		0.18

Results of t-test: * p<0.05, NS indicates not significantly different from zero