Fig. 3.

Variance, heritability, and repeatability estimates across the years for cow at weaning temperament. ${\mathrm{\sigma }}_{\mathrm{cg}}^2$ is the contemporary group variance; ${\mathrm{\sigma }}_{\mathrm{u}}^2$ is the additive genetic variance; ${\mathrm{\sigma }}_{\mathrm{pe}}^2$ is the permanent environmental variance; ${\mathrm{\sigma }}_{\mathrm{e}}^2$ is the residual variance; ${\mathrm{h}}^2$ is the heritability; and Rep is the repeatability