Table 1 |
|
|
Simulated characteristics of the cow population and of the breeding program |
|
| Cow population |
|
|
|
|
| Milking cows, nb |
20,000 |
| Cows in lactation, % |
% |
| Lactation 1 |
35 |
| Lactation 2 |
27 |
| Lactation 3 |
21 |
| Lactation 4 |
17 |
| Bull dams, nb |
250 |
| Age at first calving, months |
24 |
| Intergestation period, months |
12 |
|
|
|
| AI bull population |
|
|
|
|
| Age at birth of first progeny, months |
24 |
| Age at first breeding value estimation, months |
60 |
| Service life as proven bull, months |
48 |
| Maximum age, months |
108 |
| Bulls sampled, nb/year |
72 |
| Sires for insemination service per year, nb |
10 |
| Sires of bulls used per year, nb |
4 |
| Daughter records per bull sampled, nb |
70 |
Neuner et al. Genetics Selection Evolution 2009 41:26 doi:10.1186/1297-9686-41-26 |
|
