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Table 7 Variance, heritability and litter effect estimates for protein and phosphorus efficiency, performance, meat quality and carcass traits

From: Genetic analysis of protein efficiency and its association with performance and meat quality traits under a protein-restricted diet

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

  1. 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
  2. *** = P < 0.001, ** = P < 0.01, * = P < 0.05