Table 1 Biological, economical and technical parameters of the breeding program
parameter | unit | value |
|---|---|---|
h2 milk trait | 0.25 | |
phenotypic standard deviation | kg | 700 |
accuracy GEBV1 | 0.3 - 0.9 | |
age at first calving | month | 26 |
time between calving | month | 12 |
length of lactation | month | 10 |
maturity of test bulls | month | 14 |
number of daughters per sire | head | 993 |
insemination with test bulls | % | 20 |
average age of bull calves at purchase | month | 6 |
price of bull calves | € | 4 000 |
keeping costs of bull calves until maturity | €/day | 5 |
keeping costs of test bulls | €/day | 4.5 |
cost for genomic selection2 | € | 25 - 400 |
population of cows | head | 100 000 |
demand for cow sires | head/year | 10 |
demand for bull sires | head/year | 5 |
initial male selection candidates | head/year | 500 |
demand for bull dams (contract matings) | head/year | 1000 |
compensation payments for test bull matings | €/test bull | 3 000 |
compensation payments to breeders for keeping genotyped selection candidates | €/candidate | 150 |
maximum breeding program costs | €/year | 719 050 |
Lss4 (PED5, GS6, PPT7) | months | 23, 23, 71 |
LSD8 (PED, GS, PPT) | months | 23, 23, 61 |
LDS9 (PED, GS) | months | 26, 26 |