Table 6.
Estimates (±standard errors) for breed differences from Boran for lactation pattern and milk production traits
| Trait | Breed
|
|||
|---|---|---|---|---|
| Horro | Friesian | Jersey | Simmental | |
| LY (kg) | 10.9±69.5 | 1,134±89.3 | 616±98.3 | 707±128.9 |
| IY (kg) | 0.6±0.3 | 6.3±0.4 | 3.9±0.5 | 3.8±0.6 |
| PY (kg) | −0.1±0.3 | 6.5±0.4 | 3.5±0.5 | 4.3±0.6 |
| YD (kg) | 0.1±0.2 | 4.5±0.3 | 2.9±0.3 | 3.4±0.4 |
| DP (d) | −10.0±2.5 | −11.5±3.2 | −9.8±3.5 | −0.9±4.5 |
| LL (d) | −13.7±9.8 | 115.7±12.6 | 71.4±13.9 | 91.4±17.8 |
| ln(a) (kg) | 0.01±0.05 | 0.81±0.06 | 0.42±0.07 | 0.48±0.08 |
| c (kg/d) | −0.001±0.0004 | 0.01±0.001 | 0.01±0.001 | 0.01±0.001 |
1
LY = Lactation milk yield; IY = Initial milk yield; PY = Peak milk yield; YD = Average yield per d; DP = Days to peak; LL = Lactation length; ln(a) and c = Parameters of the MIG function.