Table 3.

Variance components of the classical linear mean model and two double hierarchical generalized linear models DHGLM1 and DHGLM2 (log-transformed data)

Sub-model	Variance component	Classical	DHGLM1	DHGLM2
Mean	Sire-dam	-	-	0.005 ± 0.001
	Genetic1	0.023 ± 0.003	0.007 ± 0.002	0.022 ± 0.003
	Common environment	0.001 ± 0.001	0.005 ± 0.001	0.001 ± 0.001
	Residual	0.047 ± 0.002	-	-
	Heritability	0.321 ± 0.040	-	-
Variance	Sire-dam	-	0.042 ± 0.011	0.034 ± 0.009
	Genetic1	-	0.166 ± 0.042	0.138 ± 0.037

¹Genetic variance is defined as 4*sire-dam variance.