Meat Production in a Feedlot System of Zebu—Holstein Steers and Heifers with Dairy Genetics: Productive and Biological Analyses

Table 3

Carcass characteristics of steers and heifers with dairy origins finished in a feedlot.

Item	Sex		Period (d)				RSD	value
	S	H	30	60	90	120		Sex	Period		LIN	QUAD	CUB
fEBW/kg	330	287	261	308	303	361	29.7	<0.001	<0.001	0.467	<0.001	<0.001	<0.001
CG/kg	72	61	32	55	79	100	9.84	<0.001	<0.001	0.066	<0.0001	<0.0001	0.889
CCW/kg	203	176	164	187	182	225	17.51	<0.001	<0.001	0.134	<0.001	<0.001	<0.001
SFT mm	4.63	5.96	3.38	5.41	5.06	7.34	1.47	0.0249	<0.001	0.331	<0.001	<0.0001	0.006
CL %	1.99	2.12	2.12	2.11	2.04	1.95	0.38	0.339	0.785	0.317	0.339	0.376	0.947
CY/kg	56	55	53	57	56	57	1.27	0.279	<0.001	0.860	<0.001	<0.001	<0.001
Length/cm	121	122	122	122	119	123	7.24	0.665	0.550	0.525	0.859	0.861	0.269
Meat %	58	55	59	56	57	54.1	2.53	<0.001	<0.001	0.872	<0.001	<0.001	0.080
Fat %	19	23	18	21	21	26.0	3.07	<0.001	<0.001	0.447	<0.001	<0.001	0.163
Bone %	18	17	19	17	17	16	2.04	0.149	0.034	0.552	<0.001	<0.001	0.143

Sex (S = steer, H = heifer); fEBW = final empty body weight in kg; CG = carcass gain in kg; CCW = cold carcass weight after cooling for 24 h at 4°C; SFT = subcutaneous fat thickness in the carcass; CL = cooling losses/% of carcass; CY = carcass yield; length = carcass length in cm; meat, fat, and bone are the proportion of the components in relation to the cold carcass; RVC = residual variable covariance; = effect of interaction between sex and period; LIN = linear effect; QUAD = quadratic effect; CUB = cubic effect; RSD = residual standard deviation.