Table 5.
Summary statistics for fertility and production traits used for variance component estimation in Red Angus cattle
| Trait | Heifer pregnancy | Stayability | |
|---|---|---|---|
| Heifer pregnancy | n | 29,322 | |
| Mean | 0.77 | ||
| SD | 0.42 | ||
| Stayability | n | 43,328 | |
| Mean | 0.28 | ||
| SD | 0.45 | ||
| Birth weight, kg | n | 141,436 | 159,204 |
| Mean | 36.08 | 36.14 | |
| SD | 5.46 | 5.31 | |
| Preweaning gain, kg | n | 134,202 | 144,198 |
| Mean | 220.07 | 219.27 | |
| SD | 38.00 | 38.90 | |
| Weaning weight, kg | n | 134,202 | 144,198 |
| Mean | 256.19 | 255.36 | |
| SD | 40.16 | 41.09 | |
| Postweaning gain, kg | n | 101,916 | 92,842 |
| Mean | 160.00 | 169.06 | |
| SD | 63.84 | 64.11 | |
| Yearling weight, kg | n | 103,334 | 90,536 |
| Mean | 418.51 | 430.94 | |
| SD | 83.64 | 86.39 | |
| Scrotal circumference, cm | n | 20,389 | 15,185 |
| Mean | 35.34 | 34.99 | |
| SD | 2.77 | 6.67 | |
| Rib eye area, cm2 | n | 2,372 | 1,676 |
| Mean | 81.51 | 82.26 | |
| SD | 9.40 | 9.42 | |
| Backfat, mm | n | 2,404 | 1,717 |
| Mean | 14.01 | 14.22 | |
| SD | 4.03 | 4.32 | |
| Marbling score | n | 2,234 | 1,459 |
| Mean | 5.44 | 5.51 | |
| SD | 1.08 | 1.09 | |
| Hot carcass weight, kg | n | 2,409 | 1,721 |
| Mean | 369.96 | 371.77 | |
| SD | 39.74 | 38.15 | |
| Ultrasound rib eye area, cm2 | n | 39,227 | 29,406 |
| Mean | 71.06 | 70.97 | |
| SD | 13.43 | 12.84 | |
| Ultrasound backfat, mm | n | 39,274 | 29,477 |
| Mean | 5.60 | 5.84 | |
| SD | 2.24 | 2.29 | |
| Ultrasound intramuscular fat, % | N | 39,113 | 29,269 |
| Mean | 3.56 | 3.64 | |
| SD | 0.97 | 1.01 | |
| Teat score | n | 2,483 | |
| Mean | 5.38 | ||
| SD | 2.03 | ||
| Udder suspension score | n | 2,483 | |
| Mean | 4.94 | ||
| SD | 2.02 | ||
| Mature weight, kg | n | 30,599 | |
| Mean | 537.49 | ||
| SD | 90.21 | ||
| Body condition score | n | 30,646 | |
| Mean | 5.15 | ||
| SD | 0.99 |