Table 7.
Estimates of genetic and phenotypic correlations with their standard errors for growth and carcass traits with feed efficiency traits
| Trait1 | ADG | MMWT | FI | FCR | RFI | RG |
|---|---|---|---|---|---|---|
| Genetic correlations | ||||||
| BWT | 0.27 ± 0.12 | 0.30 ± 0.10 | 0.20 ± 0.10 | −0.09 ± 0.15 | 0.00 ± 0.12 | 0.19 ± 0.15 |
| 200dWT | 0.45 ± 0.14 | 0.92 ± 0.04 | 0.68 ± 0.09 | 0.05 ± 0.18 | 0.25 ± 0.14 | −0.06 ± 0.18 |
| 400dWT | 0.27 ± 0.14 | 0.90 ± 0.04 | 0.42 ± 0.11 | 0.10 ± 0.17 | −0.02 ± 0.14 | −0.12 ± 0.17 |
| 600dWT | 0.53 ± 0.10 | 0.98 ± 0.01 | 0.61 ± 0.07 | −0.12 ± 0.15 | 0.15 ± 0.11 | 0.09 ± 0.15 |
| CEMA | 0.06 ± 0.15 | 0.12 ± 0.14 | −0.05 ± 0.13 | −0.05 ± 0.18 | −0.19 ± 0.14 | 0.08 ± 0.18 |
| IMF | 0.11 ± 0.15 | 0.20 ± 0.13 | 0.30 ± 0.12 | 0.06 ± 0.18 | 0.31 ± 0.14 | −0.12 ± 0.18 |
| CRIB | 0.23 ± 0.17 | −0.23 ± 0.15 | 0.11 ± 0.15 | −0.23 ± 0.20 | 0.18 ± 0.16 | 0.28 ± 0.20 |
| P8FAT | 0.27 ± 0.14 | −0.03 ± 0.13 | 0.20 ± 0.12 | −0.12 ± 0.17 | 0.24 ± 0.13 | 0.24 ± 0.17 |
| CWT | 0.71 ± 0.09 | 0.78 ± 0.05 | 0.73 ± 0.07 | −0.26 ± 0.16 | 0.40 ± 0.12 | 0.33 ± 0.16 |
| Phenotypic correlations | ||||||
| BWT | 0.13 ± 0.02 | 0.33 ± 0.02 | 0.20 ± 0.02 | 0.01 ± 0.02 | 0.01 ± 0.03 | 0.01 ± 0.02 |
| 200dWT | 0.14 ± 0.02 | 0.64 ± 0.01 | 0.33 ± 0.02 | 0.07 ± 0.02 | 0.01 ± 0.02 | −0.08 ± 0.02 |
| 400dWT | 0.10 ± 0.03 | 0.82 ± 0.01 | 0.34 ± 0.03 | 0.11 ± 0.03 | −0.08 ± 0.03 | −0.15 ± 0.03 |
| 600dWT | 0.34 ± 0.02 | 0.90 ± 0.00 | 0.48 ± 0.02 | −0.07 ± 0.02 | −0.01 ± 0.02 | 0.05 ± 0.02 |
| CEMA | −0.03 ± 0.03 | −0.11 ± 0.03 | −0.09 ± 0.03 | 0.00 ± 0.03 | −0.05 ± 0.03 | 0.01 ± 0.03 |
| IMF | 0.03 ± 0.03 | 0.05 ± 0.03 | 0.08 ± 0.03 | 0.01 ± 0.03 | 0.07 ± 0.03 | −0.01 ± 0.03 |
| CRIB | 0.02 ± 0.03 | −0.11 ± 0.03 | 0.04 ± 0.03 | −0.02 ± 0.03 | 0.06 ± 0.03 | 0.02 ± 0.03 |
| P8FAT | 0.09 ± 0.03 | 0.11 ± 0.03 | 0.17 ± 0.03 | −0.01 ± 0.03 | 0.12 ± 0.03 | 0.02 ± 0.03 |
| CWT | 0.43 ± 0.02 | 0.72 ± 0.01 | 0.52 ± 0.02 | −0.14 ± 0.03 | 0.11 ± 0.03 | 0.17 ± 0.03 |
1BWT = birth weight; 200dWT = 200-d weight; 400dWT = 400-d weight; 600dWT = 600-d weight; ADG = average daily gain; MMWT = metabolic midweight; FI = feed intake; FCR = feed conversion ratio; RFI = residual feed intake; RG = residual gain; CEMA = carcass eye muscle area; IMF = carcass intramuscular fat; CRIB = subcutaneous fat depths at the 12th/13th rib; P8FAT = rump P8 fat depth; CWT = carcass weight.