Table 1.

Model definitions for growth and carcass traits of beef cattle

Factors	Fixed or random	Traits
		BWT	WWTa	PDG	ADG	YWT	HCW	BFT	REA	MBS	LMY	CYG
Contemporary group	Fixed	√	√	√	√	√	√	√	√	√	√	√
Age of dam	Covariate	√	√	√	√	√	√	√	√	√	√	√
Weaning age	Covariate		√	√
Start age of feedlot test	Covariate				√	√
Slaughter age	Covariate						√	√	√	√	√	√
Breed fractions	Covariate	√	√	√	√	√	√	√	√	√	√	√
Maternal genetic	Random	√	√	√
Maternal permanent effect	Random	√	√	√
Direct additive	Random	√	√	√	√	√	√	√	√	√	√	√
Direct dominance	Random	√	√	√	√	√	√	√	√	√	√	√

^aThe model used for WWT is similar to the one used for W205D except that weaning age was not included.