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Table IV
Testing time considerations. The testing time of 15 y was chosen for the main scenario. Here the annual group merit at some testing times is presented as percentage of the test time maximizing group merit per year for different deviations from the optimal testing. Annual gain and annual group merit are identical unless group coancestry gets a weight, which it does not in the main scenario. While testing an alterative parameter value, the other values are kept at the main scenario values (number of parents per grandparent is 6 (12 per family with SPM)).
| Gain at optimum testing time | % of optimum annual group merit gain at the testing time given below |
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|---|---|---|---|---|---|---|---|
| Parameter (main scenario value in parenthesis) | Alternative value | ||||||
| Testing time, years | Annual gain, % | 12 y | 15 y | 18 y | |||
| Main scenario | Main scenario testing time (15 y) | – | 0.275 | 100 | 100 | 98 | |
| Main scenario | Optimum testing time | 14 | 0.276 | 100 | 100 | 98 | |
| Weight for group coancestry (0) | 40 | 15 | 0.255 | 98 | 100 | 99 | |
| 100 | 17 | 0.226 | 95 | 99 | 100 | ||
| Rotation age (70) | 50 | 12 | 0.332 | 100 | 98 | 95 | |
| 100 | 16 | 0.223 | 96 | 100 | 100 | ||
| Time not used for testing per cycle (5) | 4 | 13 | 0.288 | 100 | 99 | 97 | |
| 10 | 16 | 0.229 | 98 | 100 | 100 | ||