Table 4.

Genetic variances (diagonals), covariances (above the diagonals), heritability estimates (h²), and genetic correlation coefficients (below the diagonals) of growth and ultrasound measures by breeds

Breed	Trait	Model I				Model II				Model III
		DAYS90 (d)	BF (mm)	EMA (cm2)	RCP (%)	DAYS90 (d)	(A)BF (mm)	(A)EMA (cm2)	(A)RCP (%)	DAYS90 (d)	(A)BF (mm)	(A)EMA (cm2)	(A)RCP (%)
Landrace	DAYS90	41.04	−4.02	−3.85	2.57	39.55	−0.40	0.10	0.45	39.71	0.45	3.76	−0.07
	(A)BF	−0.34	3.35	−0.62	−2.85	−0.04	2.16	−1.06	−2.20	0.05	2.18	−0.94	−2.22
	(A)EMA	−0.26	−0.15	5.29	1.41	0.01	−0.35	4.30	1.68	0.27	−0.29	4.91	1.59
	(A)RCP	0.23	−0.91	0.35	2.97	0.04	−0.91	0.49	2.72	−0.01	−0.91	0.43	2.73
	h2	0.42	0.43	0.22	0.45	0.41	0.44	0.22	0.46	0.41	0.44	0.23	0.46
	(SE)a	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)
Yorkshire	DAYS90	37.00	−4.12	−2.66	3.02	35.71	−0.95	1.38	1.29	35.70	0.12	4.04	0.71
	(A)BF	−0.38	3.21	−0.77	−2.95	−0.11	2.28	−1.22	−2.38	0.01	2.27	−1.13	−2.36
	(A)EMA	−0.19	−0.19	5.15	1.55	0.11	−0.38	4.58	1.92	0.30	−0.33	5.15	1.91
	(A)RCP	0.28	−0.93	0.38	3.14	0.13	−0.93	0.53	2.90	0.07	−0.92	0.50	2.88
	h2	0.38	0.41	0.22	0.43	0.37	0.41	0.23	0.43	0.37	0.41	0.25	0.43
	(SE) a	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)
Duroc	DAYS90	34.74	−2.43	−1.96	1.78	33.52	−0.33	0.55	0.71	33.65	0.49	3.10	0.12
	(A)BF	−0.29	2.00	−0.45	−1.85	−0.05	1.16	−0.76	−1.39	0.08	1.20	−0.58	−1.42
	(A)EMA	−0.16	−0.15	4.25	1.36	0.05	−0.38	3.40	1.56	0.27	−0.27	3.98	1.41
	(A)RCP	0.20	−0.87	0.44	2.24	0.09	−0.89	0.58	2.11	0.01	−0.89	0.48	2.14
	h2	0.37	0.34	0.20	0.39	0.36	0.35	0.20	0.41	0.36	0.35	0.22	0.41
	(SE) a	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)	(0.01)

DAYS90, days to 90 kg body weight; BF, backfat thickness; EMA, eye muscle area; RCP, retail cut percentages; ABF, pre-adjusted BF; AEMA, pre-adjusted EMA; ARCP, pre-adjusted RCP.

^aSE, approximate standard errors estimated using ASREML 3.0 software package (Gilmour et al., 2009).