Table 3.
Estimates of SIL production trait heritabilities (h2) (±s.e.) and genetic (r g) and phenotypic (r p) correlations with methane traits
| Single trait analysis | 2-trait with g CH4/day | 2-trait with g CH4/kg DMI | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Trait | n records | Mean | σp | Direct h 2 ± s.e. | dam h 2 ± s.e. | r g | r p | r g | r p |
| WWT (kg) | 48591 | 27 | 4.11 | 0.23 ± 0.01 | 0.23 ± 0.01 | 0.71 ± 0.07 | 0.43 ± 0.02 | 0.06 ± 0.12 | 0.01 ± 0.02 |
| LW8 (kg) | 34742 | 40 | 4.95 | 0.56 ± 0.01 | – | 0.80 ± 0.04 | 0.52 ± 0.02 | 0.06 ± 0.13 | 0.03 ± 0.03 |
| FW12 (kg) | 15186 | 3.1 | 0.48 | 0.53 ± 0.02 | – | 0.11 ± 0.07 | 0.12 ± 0.03 | −0.32 ± 0.11 | −0.08 ± 0.03 |
| EMD (mm) | 22141 | 26.7 | 2.86 | 0.50 ± 0.02 | – | 0.42 ± 0.10 | 0.32 ± 0.03 | −0.03 ± 0.11 | −0.01 ± 0.03 |
| DAG3 score | 22809 | 1.03 | 1.12 | 0.43 ± 0.02 | – | −0.18 ± 0.07 | −0.06 ± 0.03 | −0.07 ± 0.13 | −0.02 ± 0.02 |
| DAG8 score | 8072 | 1.14 | 1.25 | 0.51 ± 0.03 | – | −0.07 ± 0.12 | 0.01 ± 0.04 | −0.13 ± 0.12 | −0.03 ± 0.03 |
SIL = Sheep Improvement Limited; DMI = dry matter intake; WWT = weaning weight; LW = live weight; FW = fleece weight; EMD = eye muscle depth.