Table 2.

Heritability estimates from single- and two-trait analyses of the traits studied

Traits	ST1				TT1
	${\sigma }_E^2$	${\sigma }_G^2$	${\sigma }_P^2$	h2	h2
CWT	1,214.20	907.23	2,121.43	0.43±0.09	0.42
BFT	16.57	8.25	24.82	0.33±0.07	0.34
EMA	74.42	37.18	111.60	0.33±0.07	0.34
MAR	1.55	1.38	2.94	0.47±0.08	0.47
ELP	8.79	5.38	14.17	0.38±0.08	0.39
RCW	423.59	390.93	814.53	0.48±0.09	0.48
RCP	4.37	2.19	6.57	0.33±0.08	0.34
TFW	320.23	126.45	446.68	0.28±0.07	0.29
TFP	5.99	3.37	9.36	0.36±0.08	0.34
TBW	20.93	12.15	33.08	0.37±0.08	0.38
TBP	0.87	0.28	1.14	0.24±0.07	0.25

ST, single-trait analysis; TT, two-trait analysis; ${\sigma }_E^2$, environmental variance; ${\sigma }_G^2$, additive genetic variance; ${\sigma }_P^2$, total phenotypic variance; h², direct heritability; CWT, cold carcass weight; BFT, back fat thickness; EMA, eye muscle area; MAR, marbling score; ELP, estimated lean yield percentage; RCW, retail cut weight; RCP, retail cut percentage; TFW, trimmed fat weight; TFP, trimmed fat percentage; TBW, trimmed bone weight; TBP, trimmed bone percentage.

¹Heritability estimates are the averages of 13 estimates from pair-wise analyses.