Table 1 Descriptive statistics of the phenotypic values for milk production traits
| Â | Lactation | Milk yield, kg | Fat yield, kg | Fat percentage, % | Protein yield, kg | Protein percentage, % |
|---|---|---|---|---|---|---|
Mean | 1 | 10,379.81 | 350.55 | 3.387 | 313.78 | 3.024 |
2 | 10,859.85 | 390.12 | 3.599 | 322.20 | 2.970 | |
Standard deviation | 1 | 1476.18 | 60.70 | 0.423 | 48.20 | 0.198 |
2 | 1876.61 | 83.85 | 0.504 | 57.63 | 0.192 | |
Maximum | 1 | 14,505.68 | 537.97 | 4.742 | 457.53 | 3.508 |
2 | 16,512.08 | 658.25 | 5.431 | 467.03 | 3.538 | |
Minimum | 1 | 6057.96 | 184.80 | 2.059 | 157.73 | 2.257 |
2 | 4756.94 | 145.05 | 2.212 | 137.86 | 2.199 | |
Coefficient of variation | 1 | 14.22 | 17.31 | 12.490 | 15.36 | 6.548 |
2 | 17.28 | 21.49 | 14.004 | 17.89 | 6.465 |