Table 1.
Means and standard deviations (SD) of the traits studied in the performance tested and terminal bulls
| Trait1 | Performance-tested bulls | Fattening bulls | ||||
|---|---|---|---|---|---|---|
| Number | Mean | SD | Number | Mean | SD | |
| Start age, d | 4,675 | 357 | 35 | 1,477 | 275 | 10 |
| Start weight, kg | 4,675 | 548 | 58 | 1,477 | 349 | 41 |
| FI, kg/d | 4,675 | 11.40 | 1.15 | 1,477 | 10.62 | 1.31 |
| MMW, kg | 4,675 | 126.8 | 9.0 | 1,477 | 108.1 | 8.8 |
| ADG, kg/d | 4,675 | 1.46 | 0.23 | 1,477 | 1.45 | 0.20 |
| Final age, d | 4,675 | 481 | 36 | 1,477 | 509 | 60 |
| FW, kg | 4,675 | 730 | 66 | 1,477 | 682 | 87 |
| RFI, kg/d | 4,675 | 0.00 | 0.47 | 1,477 | 0.00 | 0.82 |
| RG, kg/d | 4,675 | 0.00 | 0.18 | 1,477 | 0.00 | 0.14 |
| FE, kg/kg | 4,675 | 0.13 | 0.02 | 1,477 | 0.14 | 0.02 |
| EBW, kg | – | – | – | 1,427 | 590 | 78 |
| HCW, kg | – | – | – | 1,427 | 402.4 | 57.4 |
| MW, kg | – | – | – | 1,427 | 285.4 | 42.0 |
| FW, kg | – | – | – | 1,427 | 59.6 | 14.6 |
| 5th QW, kg | – | – | – | 1,427 | 183.7 | 25.0 |
| Leather, kg | – | – | – | 1,427 | 53.2 | 8.2 |
| 5th QFW, kg | – | – | – | 1,427 | 16.0 | 5.8 |
| Rumen, kg | – | – | – | 1,427 | 12.6 | 2.3 |
| Omasum, kg | – | – | – | 1,427 | 4.5 | 1.0 |
| Abomasum, kg | – | – | – | 1,427 | 2.1 | 0.5 |
| Intestines, kg | – | – | – | 1,427 | 12.0 | 2.3 |
| Liver, kg | – | – | – | 1,427 | 6.8 | 1.0 |
| Lung, kg | – | – | – | 1,427 | 4.1 | 0.6 |
| Heart, kg | – | – | – | 1,427 | 2.3 | 0.4 |
| Kidneys, kg | – | – | – | 1,427 | 1.2 | 0.2 |
| Spleen, kg | – | – | – | 1,427 | 1.2 | 0.3 |
1Trait abbreviations: FI = daily feed intake; MBW = metabolic mean-weight; ADG = average daily gain; FW = final weight; RFI = residual feed intake; RG = residual gain; FE = feed efficiency; EBW = empty body weight; HCW = hot carcass weight; MW = muscle weight; FW = fat weight; 5th QW = 5th quarter weight; 5th QFW = 5th quarter fat weight.