Table 3. Regression coefficients of dam traits on daughter milking performance.
Breed | Prenatal Environment indicator trait | Lactation | Regression Coefficient | ||
Volume (litres) | Fat (kg) | Protein (kg) | |||
Jersey | Dam milk volume (litres) | 1 | 7.95±0.60** | 0.14±0.03** | 0.16±0.02** |
2 | 9.18±0.79** | 0.02±0.01* | 0.18±0.03** | ||
Dam Fat % | 1 | −36.2±2.8** | 0.84±0.13** | −0.41±0.09** | |
2 | −28.9±4.0** | 0.77±0.17** | −0.83±0.12** | ||
Dam protein % | 1 | −29.8±3.8** | −0.01±0.17ns | −0.04±0.12ns | |
2 | −36.7±4.8** | −0.12±0.22ns | −0.08±0.16ns | ||
Holstein Friesian | Dam milk volume (litres) | 1 | 5.71±0.32** | −0.02±0.01* | 0.07±0.10ns |
2 | 7.08±0.44** | −0.01±0.02ns | 0.09±0.01** | ||
Dam Fat % | 1 | −53.4±2.4** | 2.29±0.10** | −0.39±0.07** | |
2 | −79.7±3.2** | 2.39±0.13** | −0.83±0.10** | ||
Dam protein % | 1 | −47.9±3.5** | 0.87±0.14** | 0.33±0.10** | |
2 | −65.4±4.6** | 0.70±0.18** | 0.16±0.14ns |
Standard errors are given for each estimate.
**P<0.01;
*P<0.05;
ns = not significantly different from zero.