Validation of reaction norm breeding values for robustness in Australian sheep

Table 5 Variance components for the reaction norms models fitted to each fold in the cross-validation, the forward prediction (2007–2010), and all the data (18,171 lambs)

Data	\({{\upsigma }}_{\text{a}0}^{2}\) (kg²)	\({{\upsigma }}_{\text{a}1 }^{2}\) (kg²/SD EC)	\({\text{r}}_{\text{a}0\text{a}1 }\)	\({{\upsigma }}_{{\text{a}}_{1} }^{2}/{{\upsigma }}_{{\text{a}}_{0} }^{2}\)	g²	c²
Fold 1	8.40 (0.53)	0.66 (0.24)	0.10 (0.11)	0.08	40.92 (14.25)	1.99 (0.28)
Fold 2	7.29 (0.48)	0.67 (0.29)	0.08 (0.10)	0.09	40.77 (14.22)	2.29 (0.28)
Fold 3	8.11 (0.53)	0.66 (0.23)	− 0.01 (0.11)	0.08	44.97 (15.85)	1.98 (0.28)
2007–2010	7.94 (0.49)	0.69 (0.21)	0.09 (0.10)	0.09	39.31 (13.74)	2.19 (0.25)
All data	7.88 (0.44)	0.64 (0.18)	0.04 (0.09)	0.08	40.95 (14.29)	2.13 (0.22)

\({{\upsigma }}_{\text{a}0 }^{2}\): additive genetic intercept; \({{\upsigma }}_{\text{a}1 }^{2}\): additive genetic slope; \({\text{r}}_{\text{a}0\text{a}1 }\): correlation between intercept and slope; g²: genetic group; c²: permanent environmental dam. Standard errors are given in parentheses

ISSN: 1297-9686