Table 1.
Descriptive statistics for female fertility traits and heritabilities (standard errors) estimated using a pedigree-based linear mixed model
| Trait | No. of records | No. of animals | Mean | SD | Min | Max | Heritability |
|---|---|---|---|---|---|---|---|
| AIS | 705,835 | 383,179 | 2.06 | 1.24 | 1 | 5 | 0.027 (0.001) |
| ICF | 723,333 | 391,930 | 74.4 | 31.1 | 20 | 180 | 0.057 (0.003) |
| IFL | 728,426 | 393,561 | 47.7 | 61.3 | 0 | 230 | 0.032 (0.002) |
| NRR | 715,911 | 386,869 | 0.542 | 0.498 | 0 | 1 | 0.011 (0.001) |
AIS number of inseminations per conception, ICF interval from calving to first insemination, IFL interval from first to last insemination, NRR non-return rate at 56 days after first insemination, SD standard deviation, Min minimum value, Max maximum value