Table 3.
Qualitative indicators of milk from cows with different genotypes for the TG5 gene.
| Indicator | Genotype | Difference between genotypes | ||||
|---|---|---|---|---|---|---|
| TG5CC | TG5CT | TG5TT | TG5CC/TG5CT | TG5CC/TG5TT | TG5CT/TG5TT | |
| Black-and-white breed (n=50) | ||||||
| Milk yield, kg | 4570.7±89.0 | 4756.4±99.7 | 4825.3±95.9 | –185.7 | –254.6* | –66.9 |
| Fat, % | 3.69±0.05 | 3.75±0.02 | 3.78±0.04 | –0.06 | –0.09 | –0.03 |
| Protein, % | 3.28±0.07 | 3.26±0.01 | 3.25±0.08 | 0.02 | 0.03 | 0.01 |
| Casein, % | 2.77±0.10 | 2.88±0.05 | 2.83±0.09 | –0.11 | –0.06 | 0.05 |
| Lactose, % | 4.95±0.15 | 4.99±0.04 | 4.97±0.11 | –0.04 | –0.02 | 0.02 |
| MSNF, % | 8.91±0.17 | 8.97±0.22 | 8.95±0.18 | –0.06 | –0.04 | 0.02 |
| Milk fat, kg | 168.6±5.2 | 178.3±4.5 | 182.4±4.9 | –9.7 | –13.8* | –4.1 |
| Bestuzhev breed (n=50) | ||||||
| Milk yield, kg | 3428.4±88.5 | 3450.1±78.9 | 3581.2±56.9 | –21.7 | –152.8 | –131.1 |
| Fat, % | 3.50±0.07 | 3.57±0.09 | 3.88±0.06 | –0.07 | –0.38** | –0.31** |
| Protein, % | 3.22±0.06 | 3.26±0.07 | 3.47±0.03 | –0.04 | –0.25** | –0.21** |
| Casein, % | 2.80±0.17 | 2.76±0.11 | 2.85±0.10 | 0.04 | –0.05 | –0.09 |
| Lactose, % | 4.64±0.12 | 4.25±0.14 | 4.86±0.10 | 0.39 | –0.22 | –0.61** |
| MSNF, % | 8.56±0.15 | 8.66±0.17 | 9.03±0.26 | 0.1 | –0.47 | –0.37 |
| Milk fat, kg | 119. 9±6.1 | 123.2±4.9 | 138.9±5.1 | –3.3 | –19.0* | –15.7* |
| Simmental breed (n=50) | ||||||
| Milk yield, kg | 3785.5±88.5 | 3829.6±80.6 | 3975.2±56.9 | –24.1 | –189.7* | –145.6 |
| Fat, % | 3.66±0.08 | 3.62±0.09 | 3.92±0.09 | 0.04 | –0.26* | –0.3* |
| Protein, % | 3.37±0.07 | 3.29±0.08 | 3.56±0.06 | 0.08 | –0.19* | –0.27* |
| Casein, % | 2.90±0.19 | 2.86±0.12 | 2.95±0.11 | 0.04 | –0.05 | –0.09 |
| Lactose, % | 4.52±0.13 | 4.50±0.16 | 4.55±0.14 | 0.02 | 0.03 | 0.05 |
| MSNF, % | 8.74±0.17 | 8.80±0.23 | 9.03±0.17 | –0.06 | –0.29 | –0.23 |
| Milk fat, kg | 138.5±7.0 | 138.6±6.5 | 155.8±4.8 | –0.1 | –17.3* | –17.2* |
MSNF=Milk solids non-fat, Significance of differences according to Student’s t test
*
-p<0,05;
**
-p<0,01