Table 4.
Effect on milk production traits and fertility in Holstein and Jersey populations of increasing inbreeding by 1%
| Breed | Trait | Pedigree 1 | Genotyped 2 | ||||
|---|---|---|---|---|---|---|---|
| Ped_F 3 | Ped_F | GRM_F 4 | |||||
| b 5 (s.e.) | -log10 (P-value) | b (s.e.) | -log10 (P-value) | b (s.e.) | -log10 (P-value) | ||
| Holstein | Milk (L) | -21.1 (1.5) | 45.2 | -11.3 (8.8) | 0.7 | -27.8 (5.7) | 5.9 |
| Fat (kg) | -0.73 (0.06) | 33.4 | -0.67 (0.36) | 1.2 | -1.28 (0.23) | 7.3 | |
| Protein (kg) | -0.63 (0.05) | 37.2 | -0.33 (0.29) | 0.6 | -0.93 (0.19) | 5.9 | |
| Calving interval (d) | 0.18 (0.05) | 4.4 | 0.12 (0.26) | 0.2 | 0.22 (0.17) | 0.69 | |
| Jersey | Milk (L) | -12.0 (2.4) | 6.4 | -9.4 (7.1) | 0.8 | -27.2 (5.2) | 6.8 |
| Fat (kg) | -0.62 (0.12) | 7.0 | -0.65 (0.36) | 1.2 | -1.58 (0.26) | 8.6 | |
| Protein (kg) | -0.45 (0.08) | 6.7 | -0.39 (0.26) | 0.9 | -1.09 (0.19) | 7.7 | |
| Calving interval (d) | 0.14 (0.09) | 0.8 | -0.32 (0.28) | 0.6 | -0.08 (0.22) | 0.2 | |
Pedigree1: Population with pedigree information only; 2Genotyped2: Population with pedigree and genomic information; Ped_F3: pedigree inbreeding; GRM_F4: genomic inbreeding, defined as the diagonal of the GRM – 1; b5: effect of a 1% increase in inbreeding and associated standard errors (s.e.) for Holstein and Jersey populations for milk, fat and protein yields and calving interval as a measure of fertility.