TABLE 6.

Variance components (additive genetic variance $\left({\sigma }_a^2\right.$ ), error variance ( ${\sigma }_e^2$ ), phenotypic variance ( ${\sigma }_p^2$ ), heritabilities ( $h^2$ ) and genetic coefficients of variation (GCV)) of average milk yield (AMY), productive lifespan (PLS), and herd life (HL) from the univariate analyses.

Trait	${\sigma }_a^2$	${\sigma }_e^2$	${\sigma }_p^2$	GCV	$h^2$	p-Value of $h^2$
LPS	0.457 (0.224)	2.904 (0.232)	3.36 (0.158)	0.01	0.14 (0.07)	0.0154
HL	0.336 (0.203)	2.907 (0.22)	3.243 (0.151)	0.005	0.1 (0.06)	0.0482
AMY	1.919 (0.242)	2.536 (0.181)	4.455 (0.146)	0.15	0.43 (0.04)	<0.0001