Table 4.
Heritability (h2) and phenotypic (rp) and genetic (rg) correlations with REI measured during the hay and maize phases for various traits, with SEs in brackets
| Hay REI | Maize REI | ||||
|---|---|---|---|---|---|
| Trait | h 2 | r p | r g | r p | r g |
| Hay energy intake, UFV/d | 0.15 (0.08) | 0.97 (0.01) | 0.88 (0.07) | 0.36 (0.04) | 0.68 (0.28) |
| Maize energy intake, UFV/d | 0.20 (0.08) | 0.32 (0.04) | 0.60 (0.29) | 0.87 (0.01) | 0.68 (0.17) |
| Hay phase mid-weight, kg | 0.68 (0.08) | 0.01 (0.04) | 0.09 (0.23) | −0.01 (0.04) | 0.03 (0.23) |
| Maize phase mid-weight, kg | 0.68 (0.08) | 0.01 (0.04) | 0.11 (0.23) | 0.01 (0.04) | 0.04 (0.23) |
| Hay phase ADG, kg/d | 0.08 (0.07) | 0.00 (0.04) | 0.18 (0.54) | 0.10 (0.04) | −0.32 (0.58) |
| Maize phase ADG, kg/d | 0.13 (0.07) | 0.00 (0.04) | −0.14 (0.44) | 0.00 (0.04) | −0.17 (0.43) |
| EBW, kg | 0.68 (0.09) | 0.01 (0.04) | −0.12 (0.25) | 0.02 (0.02) | −0.12 (0.25) |
| Carcass, % of EBW | 0.53 (0.11) | −0.08 (0.05) | −0.24 (0.28) | −0.12 (0.05) | −0.32 (0.26) |
| Muscle, % of carcass | 0.33 (0.10) | −0.11 (0.04) | −0.44 (0.30) | −0.09 (0.04) | −0.35 (0.29) |
| Fat, % of carcass | 0.27 (0.09) | 0.11 (0.04) | 0.30 (0.33) | 0.09 (0.04) | 0.28 (0.31) |
| Fifth quarter, % of EBW | 0.51 (0.10) | 0.08 (0.05) | 0.62 (0.25) | 0.12 (0.05) | 0.43 (0.26) |
| Leather, % of EBW | 0.47 (0.11) | −0.03 (0.04) | 0.09 (0.30) | 0.01 (0.04) | 0.24 (0.28) |
| Fifth quarter fat, % of EBW | 0.33 (0.10) | 0.15 (0.04) | 0.59 (0.28) | 0.08 (0.04) | 0.25 (0.30) |
| Rumen, % of EBW | 0.23 (0.09) | 0.07 (0.04) | 0.49 (0.33) | 0.11 (0.04) | −0.11 (0.35) |
| Omasum, % of EBW | 0.19 (0.08) | 0.06 (0.04) | 0.12 (0.37) | 0.09 (0.04) | 0.15 (0.36) |
| Abomasum, % of EBW | 0.14 (0.08) | 0.04 (0.04) | 0.52 (0.40) | 0.09 (0.04) | 0.94 (0.40) |
| Intestines, % of EBW | 0.11 (0.07) | 0.09 (0.04) | 0.66 (0.47) | 0.11 (0.04) | 0.74 (0.41) |
| Digestive tract, % of EBW | 0.20 (0.08) | 0.11 (0.04) | 0.59 (0.35) | 0.16 (0.04) | 0.48 (0.34) |
| Reproductive tract, % of EBW | 0.08 (0.08) | −0.03 (0.04) | 0.83 (0.60) | 0.01 (0.04) | 0.72 (0.60) |
| Liver, % of EBW | 0.39 (0.09) | 0.11 (0.04) | 0.44 (0.27) | 0.26 (0.04) | 0.57 (0.26) |
| Lungs, % of EBW | 0.05 (0.07) | 0.06 (0.04) | 0.60 (0.68) | 0.06 (0.04) | 0.53 (0.66) |
| Heart, % of EBW | 0.50 (0.10) | −0.01 (0.05) | 0.34 (0.28) | 0.03 (0.05) | 0.25 (0.28) |
| Kidneys, % of EBW | 0.27 (0.09) | 0.01 (0.05) | 0.30 (0.35) | 0.07 (0.05) | 0.24 (0.34) |
| Spleen, % of EBW | 0.38 (0.10) | 0.02 (0.05) | 0.77 (0.26) | 0.03 (0.04) | 0.52 (0.31) |