Table 1.
Generation intervals in Holstein dairy cattle population
| Pathway | No. of pairs | Generation interval (yr) | |||
|---|---|---|---|---|---|
|
| |||||
| Mean±STD | Skewness | Median | Mode | ||
| Sire → offspring (LSO) | 810,391 | 8.10±1.99 | 1.21 | 7.85 | 6.92 |
| Sire → Bull (LSB) | 5,694 | 7.93±2.59 | 1.12 | 7.46 | 6.32 |
| Sire → Cow (LSC) | 804,697 | 8.10±1.98 | 1.12 | 7.86 | 6.92 |
| Dam → offspring (LDO) | 780,239 | 4.20±2.02 | 1.97 | 3.76 | 2.00 |
| Dam → Bull (LDB) | 5,340 | 4.94±2.31 | 1.52 | 4.56 | 2.25 |
| Dam → Cow (LDC) | 774,899 | 4.19±2.02 | 1.97 | 3.75 | 2.00 |
| Parent →offspring (LPO) | 1,590,630 | 6.19±2.80 | 0.55 | 6.55 | 2.00 |
STD, standard deviation; Lso, generation interval from sire to offspring, etc.