Table 4.
Meat productivity and quality of meat of bulls of various genotypes by the TG5 gene.
| Indicator | Genotype | ||
|---|---|---|---|
| TG5CC (n=20) | TG5CT (n=20) | TG5TT (n=10) | |
| Hereford breed (n=50) | |||
| Bodyweight of newborn calves, kg | 33.5±0.28 | 33.1±0.35 | 33.0±0.42 |
| Gained bodyweight, kg | 576.25±5.74 | 569.6±5.42 | 564.7±6.18 |
| Absolute body gain, kg | 542.8±5.22 | 536.5±6.36 | 531.7±6.33 |
| Average daily gain of bodyweight, g | 892.8±8.59 | 882.4±10.46 | 874.5±10.97 |
| Before slaughter bodyweight, kg | 559.9±5.80 | 552.4±3.06 | 549.4±5.20 |
| Carcass yield, % | 58.8±0.53 | 58.7±0.42 | 58.4±0.60 |
| Internal raw fat weight, kg | 19.09±0.51 | 19.15±0.32 | 20.09±0.30 |
| Fat yield, % | 3.40±0.09 | 3.40±0.05 | 3.65±0.07* |
| Slaughter yield, % | 62.20±0.24 | 62.10±0.27 | 62.00±0.18 |
| The fat content of the rib eye,% | 5.70±0.21 | 6.05±0.90 | 6.44±0.15* |
| Fat content in the general sample of ground beef, % | 14.38±0.10 | 14.54±0.08 | 14.69±0.06* |
| Limousine breed (n=50) | |||
| Bodyweight of newborn calves, kg | 33.9±0.30 | 34.2±0.27 | 34.9±0.23 |
| Gained bodyweight, kg | 604.1±3.99 | 598.1±2.16 | 581.4±6.60 |
| Absolute bodyweight gain, kg | 570.2±4.89 | 563.9±3.07 | 546.5±4.47 |
| Average daily bodyweight gain, g | 937.8±8.05 | 927.5±5.05 | 898.9±7.34 |
| Before slaughter bodyweight, kg | 584.0±6.16 | 577.4±0.44 | 567.0±4.43 |
| Carcass yield, % | 60.0±0.62 | 59.9±0.96 | 59.9±0.78 |
| Internal raw fat weight, kg | 17.30±0.18 | 17.80±0.17 | 18.00±0.33 |
| Fat yield, % | 2.95±0.01 | 3.06±0.14 | 3.19±0.02* |
| Slaughter yield, % | 62.90±0.11 | 63.10±0.12 | 63.10±0.22 |
| The fat content of the rib eye,% | 5.60±0.28 | 5.95±0.28 | 6.55±0.16* |
| Fat content in the general sample of ground beef, % | 13.16±0.05 | 13.46±0.03 | 13.65±0.26* |
Significance of differences according to Student’s t test
*
-p<0,05