Table 2.
Number of additive and dominance significant SNPs jointly identified at a false discovery rate of 5 and 10% for the studied traits in purebreds, crossbreds and combined populations of beef cattle using the Illumina BovineSNP50 BeadChip
| Traits | Purebreds (n = 1467) | Crossbreds (n = 5327) | Combined (n = 6794) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Additive | Dominance | Additive | Dominance | Additive | Dominance | |||||||
| 5% | 10% | 5% | 10% | 5% | 10% | 5% | 10% | 5% | 10% | 5% | 10% | |
| Birth weight (kg) | 5 | 7 | 0 | 0 | 58 | 109 | 1 | 2 | 66 | 116 | 0 | 0 |
| Weaning weight (kg) | 0 | 0 | 0 | 1 | 10 | 21 | 0 | 0 | 18 | 24 | 1 | 1 |
| Pre-weaning daily gain (kg/d) | 0 | 0 | 0 | 1 | 8 | 10 | 0 | 0 | 2 | 3 | 0 | 1 |
| Average daily gain (kg/d) | 1 | 1 | 0 | 0 | 23 | 40 | 0 | 0 | 37 | 49 | 0 | 0 |
| Yearling weight (kg) | 0 | 0 | 0 | 0 | 50 | 71 | 0 | 1 | 64 | 94 | 0 | 0 |
| Hot carcass weight (kg) | 0 | 1 | 0 | 0 | 17 | 23 | 0 | 0 | 24 | 29 | 0 | 0 |
| Back fat thickness (mm) | 0 | 0 | 0 | 0 | 3 | 6 | 0 | 0 | 6 | 8 | 0 | 0 |
| Rib eye area (cm2) | 0 | 3 | 0 | 0 | 12 | 12 | 0 | 0 | 15 | 19 | 0 | 0 |
| Marbling score | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 3 | 4 | 2 | 2 |
| Lean meat yield (%) | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 14 | 0 | 0 |
| Yield grade | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 0 | 0 |
Purebred individuals have > 80% of Angus, Hereford and Charolais; crossbred individuals included Kinsella composite, Beefbooster TX composite (www.beefbooster.com) and two and more way crosses involving Angus, Hereford, Charolais, Gelbvieh, Simmental, Limousin, and Piedmontese breeds