Table 3.
Mean, minimum and maximum (standard deviations in parentheses) of genetic correlations between the milk urea concentration (MU) and milk traits on the same days in milk (DIM) in the first three lactations
| Trait | First lactation | Second lactation | Third lactation | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean (SD) | Min. | Max. | Mean (SD) | Min. | Max. | Mean (SD) | Min. | Max. | |
| Milk (kg) | 0.24 (0.06) | 0.17 | 0.40 | 0.20 (0.10) | 0.09 | 0.42 | 0.42 (0.07) | 0.22 | 0.51 |
| Protein (kg) | 0.19 (0.10) | 0.07 | 0.39 | 0.09 (0.15) | −0.05 | 0.40 | 0.33 (0.14) | −0.09 | 0.43 |
| Fat (kg) | 0.17 (0.10) | −0.06 | 0.37 | 0.16 (0.08) | 0.09 | 0.33 | 0.35 (0.07) | 0.12 | 0.43 |
| Protein (%) | −0.24 (0.11) | −0.48 | −0.08 | −0.19 (0.07) | −0.27 | 0.00 | −0.11 (0.17) | −0.36 | 0.12 |
| Fat (%) | −0.10 (0.14) | −0.38 | 0.07 | −0.09 (0.13) | −0.37 | 0.04 | 0.09 (0.08) | −0.11 | 0.18 |
| Lactose (%) | 0.01 (0.04) | −0.04 | 0.12 | −0.05 (0.22) | −0.58 | 0.27 | 0.10 (0.18) | −0.43 | 0.25 |
| FPR* | −0.14 (0.05) | −0.19 | −0.04 | 0.03 (0.22) | −0.49 | 0.24 | 0.18 (0.18) | −0.14 | 0.41 |
| SCS* | −0.14 (0.11) | −0.43 | −0.01 | −0.17 (0.09) | −0.38 | 0.09 | −0.09 (0.11) | −0.22 | 0.12 |
*FPR fat to protein ratio, SCS somatic cell score