Table 1.

Fixed effects and random effects included in the models for traits evaluated in the analyses of genetic parameters

Traits1	Fixed effect				Random effect
	Class variables			Covariate (linear)
	Farm	Year-season2	Technician	Age3	Additive genetic
UBF	X	X	X	X	X
ULMA	X	X	X	X	X
UMS	X	X	X	X	X
CW	X	X		X	X
BF	X	X		X	X
LMA	X	X		X	X
MS	X	X		X	X

¹UBF = Ultrasound backfat thickness; ULMA = Ultrasound longissimus muscle area; UMS = Ultrasound marbling score; C = Carcass weight; BF = Backfat thickness; LMA = Longissimus muscle area; MS = Marbling score.

²Year-season = Year-season at ultrasound measurements or year-season at slaughter.

³Age = Age (in days) at ultrasound measurements or at slaughter.