Table 3.
Association of IGF1 Exon 3 Genotypes with Growth and Carcass Traits in New Zealand Romney Sheep
| Trait* | Mean ± SE** |
p | ||
|---|---|---|---|---|
| A2A2 |
A2B2 |
B2B2 |
||
| (n = 144) | (n = 362) | (n = 209) | ||
| Birth weight (kg) | 5.78 ± 0.08 | 5.76 ± 0.05 | 5.68 ± 0.07 | 0.515 |
| Growth rate to weaning (grams/day) | 395.07 ± 5.08 | 385.96 ± 3.54 | 388.76 ± 4.55 | 0.256 |
| (n = 93) | (n = 223) | (n = 127) | ||
| HCW (kg) | 17.31 ± 0.25a | 17.17 ± 0.20a | 16.63 ± 0.23b | 0.010 |
| V-GR (mm) | 7.91 ± 0.34a | 7.67 ± 0.28a | 6.88 ± 0.31b | 0.005 |
| Shoulder yield (%) | 17.24 ± 0.10a | 17.24 ± 0.08a | 17.02 ± 0.09b | 0.021 |
| Loin yield (%) | 14.91 ± 0.11 | 14.92 ± 0.09 | 14.83 ± 0.11 | 0.604 |
| Leg yield (%) | 22.16 ± 0.15 | 22.12 ± 0.13 | 22.19 ± 0.14 | 0.824 |
| Total yield (%) | 54.22 ± 0.24 | 54.30 ± 0.23 | 53.91 ± 0.52 | 0.717 |
| Proportion shoulder yield (%) | 31.79 ± 0.12 | 31.83 ± 0.11 | 31.62 ± 0.12 | 0.148 |
| Proportion loin yield (%) | 27.46 ± 0.10 | 27.38 ± 0.08 | 27.35 ± 0.10 | 0.648 |
| Proportion leg yield (%) | 40.76 ± 0.11 | 40.79 ± 0.10 | 40.97 ± 0.11 | 0.126 |
*
HCW—hot carcass weight; V-GR—VIAScan fat depth at the 12th rib.
**
Predicted means and standard error of those means derived from the GLMMs, with means that do not share a superscript letter (a or b) within rows being different at p < 0.05 and shown in bold.