Table 8.
Genetic and phenotypic correlations of calf serum traits with milk production traits
| Trait | STP | S-IgGa | KLH-IgA | KLH-IgG | KLH-IgM | MDP-IgA | MDP-IgG | MDP-IgM |
|---|---|---|---|---|---|---|---|---|
| Phenotypic correlations | ||||||||
| AFC | − 0.04 (0.08) | 0.03 (0.08) | − 0.13 (0.08) | − 0.16 (0.08) | 0.03 (0.08) | 0.05 (0.08) | − 0.01 (0.08) | − 0.11 (0.08) |
| Fat % | − 0.12 (0.07) | − 0.02 (0.07) | − 0.02 (0.07) | − 0.09 (0.07) | − 0.03 (0.07) | − 0.08 (0.07) | − 0.04 (0.07) | − 0.05 (0.07) |
| Milk yield | − 0.03 (0.07) | − 0.06 (0.08) | − 0.04 (0.07) | − 0.07 (0.07) | − 0.09 (0.08) | − 0.11 (0.07) | − 0.05 (0.08) | − 0.11 (0.08) |
| Protein % | 0.02 (0.07) | 0.06 (0.07) | 0.02 (0.07) | − 0.01 (0.07) | 0.06 (0.07) | 0.05 (0.07) | 0.05 (0.07) | 0.02 (0.07) |
| LASCS | − 0.09 (0.07) | − 0.12 (0.07) | 0.01 (0.07) | 0.05 (0.07) | − 0.12 (0.07) | − 0.19 (0.07) | − 0.10 (0.07) | 0.07 (0.07) |
| Genetic correlations | ||||||||
| AFC | − 0.18 (0.25) | 0.09 (0.18) | − 0.27 (0.16) | − 0.44 (0.18)b | − 0.06 (0.19) | − 0.02 (0.14) | − 0.09 (0.16) | − 0.23 (0.16) |
| Fat % | − 0.18 (0.22) | 0.00 (0.18) | − 0.14 (0.16) | − 0.08 (0.17) | 0.06 (0.19) | − 0.13 (0.14) | − 0.16 (0.17) | − 0.11 (0.15) |
| Milk yield | − 0.38 (0.27) | − 0.20 (0.20) | 0.00 (0.18) | 0.06 (0.20) | − 0.20 (0.21) | − 0.32 (0.16) | − 0.16 (0.19) | − 0.28 (0.17) |
| Protein % | 0.21 (0.21) | 0.21 (0.17) | − 0.06 (0.16) | − 0.16 (0.18) | 0.06 (0.18) | 0.10 (0.14) | 0.18 (0.16) | 0.12 (0.15) |
| LASCS | − 0.52 (0.33) | − 0.62 (0.26)b | − 0.38 (0.25) | − 0.63 (0.26)b | − 0.98 (0.26) | − 0.66 (0.22) | − 0.74 (0.30)b | − 0.86 (0.23) |
Numbers in parenthesis are the standard errors
Bold characters highlight significant genetic correlations
AFC age of first calving, LASCS lactation average somatic cell score, STP serum total protein, S-IgG serum IgG
The natural antibodies are coded as follows: MDP Muramyl dipeptide, KLH Keyhole limpet hemocyanin, IgA Immunoglobulin A, IgG Immunoglobulin G, IgM Immunoglobulin M
aVariance components for correlations were estimated using a square root transformation
bSuggestive significance (0.05 < p-value < 0.10)