Table 2.
Number of sires and progeny, mean (± SD), and range of the least-squares means of beef-cross-dairy progeny groups for birth (gestation length and birthweight), growth (age at weaning and liveweight (LWT) at 200, 400, 600, and 800days of age), and carcass traits (carcass weight, eye muscle area (EMA), rib fat depth, and marble score), for 30 Angus and 34 Hereford sires.
| Progeny mean | Angus | Hereford | ||||||
|---|---|---|---|---|---|---|---|---|
| n sires | n progeny | Mean±SD | Range | n sires | n progeny | Mean±SD | Range | |
| Gestation length (days) | 29 | 405 | 279.8±1.5 | 276.4 to 282.9 | 34 | 455 | 282.9±2.8 | 276.1 to 289.0 |
| LWT at birth (kg) | 30 | 463 | 36.2±1.6 | 33.6 to 40.2 | 34 | 512 | 37.3±1.9 | 33.7 to 43.1 |
| Age at weaning (days) | 29 | 407 | 82.2±3.3 | 76.8 to 88.0 | 34 | 458 | 80.9±4.3 | 70.2 to 88.2 |
| LWT at 200d (kg) | 29 | 406 | 158.4±5.3 | 148.4 to 168.5 | 34 | 460 | 158.7±5.1 | 150.1 to 172.3 |
| LWT at 400d (kg) | 29 | 394 | 284.1±7.9 | 269.5 to 299.3 | 34 | 457 | 283.4±8.8 | 264.1 to 298.3 |
| LWT at 600d (kg) | 29 | 379 | 425.2±13.6 | 401.9 to 465.1 | 34 | 446 | 426.0±12.0 | 402.5 to 447.8 |
| LWT at 800d (kg) | 29 | 329 | 502.5±14.2 | 475.7 to 540.7 | 34 | 397 | 505.4±15.8 | 470.4 to 544.1 |
| Carcass weight (kg) | 29 | 369 | 276.4±9.2 | 258.5 to 304.8 | 34 | 429 | 277.0±9.3 | 260.7 to 295.6 |
| EMA (cm2) | 29 | 367 | 73.8±3.0 | 66.8 to 79.0 | 34 | 428 | 73.2±3.7 | 66.9 to 82.9 |
| Rib fat depth (mm) | 29 | 366 | 7.2±1.2 | 4.8 to 9.2 | 34 | 428 | 7.7±1.5 | 4.9 to 11.3 |
| Marble score | 29 | 331 | 1.1±0.3 | 0.5 to 1.6 | 33 | 384 | 0.8±0.3 | 0.2 to 1.5 |