Table 7.

Variance, heritability and litter effect estimates for protein and phosphorus efficiency, performance, meat quality and carcass traits

Trait	N	σ2A	Heritability	σ2CE	Litter effect	σ2P
PE	1071	5.2 × 10–4 ± 1.2 × 10–4***	0.54 ± 0.10	5.8 × 10–6 ± 3.1 × 10–5	0.006 ± 0.03	9.6 × 10–4 ± 5.7 × 10–5
PhE	1071	5.6 × 10–4 ± 2.2 × 10–4**	0.27 ± 0.10	1.2 × 10–4 ± 8.5 × 10–5	0.06 ± 0.04	2.1 × 10–3 ± 1.1 × 10–4
ADG	1071	1.3 × 10–3 ± 3.7 × 10–4***	0.45 ± 0.11	4.2 × 10–4 ± 1.3 × 10–4***	0.15 ± 0.05	2.9 × 10–3 ± 1.8 × 10–4
FCR	1071	8.1 × 10–3 ± 2.7 × 10–3**	0.39 ± 0.12	2.2 × 10–3 ± 9.6 × 10–4*	0.11 ± 0.05	2.1 × 10–2 ± 1.2 × 10–3
ADFI	1071	1.2 × 10–2 ± 3.4 × 10–3***	0.53 ± 0.12	2.7 × 10–3 ± 1.1 × 10–3**	0.12 ± 0.05	2.3 × 10–2 ± 1.5 × 10–3
L*	509	1.60 ± 0.52 **	0.36 ± 0.10	–	–	4.43 ± 0.33
a*	509	0.50 ± 0.13 ***	0.58 ± 0.11	–	–	0.86 ± 0.07
b*	509	0.27 ± 0.08 ***	0.41 ± 0.10	–	–	0.65 ± 0.05
LMA	509	4.53 ± 1.75 **	0.34 ± 0.12	–	–	13.33 ± 1.13
IMF	509	154.09 ± 36.10 ***	0.76 ± 0.12	–	–	203.63 ± 19.00
ShF	509	35.37 ± 11.15 **	0.38 ± 0.10	–	–	92.47 ± 6.88
DL	509	0.62 ± 0.18 ***	0.40 ± 0.10	–	–	1.53 ± 0.11
CL	509	5.92 ± 1.88 **	0.36 ± 0.10	–	–	16.26 ± 1.19
BT	509	9.35 ± 2.41**	0.51 ± 0.10			18.37 ± 1.43

PE protein efficiency, PhE phosphorus efficiency, ADG average daily gain, FCR feed conversion ratio, ADFI average daily feed intake, L* meat lightness, a* meat redness, b* meat yellowness, LMA loin muscle area, IMF intramuscular fat, ShF shear force, DL drip loss, CL cooking loss, BT backfat thickness. N sample size σ²A additive genetic variance, σ²CE common environment variance, σ²P phenotypic variance

*** = P < 0.001, ** = P < 0.01, * = P < 0.05