Table 7.
Genetic correlations of colostrum traits (horizontal) with first test milk, pre-parturition serum traits and milk production traits
| Trait | Brix | T-IgGa | KLH-IgA | KLH-IgG | KLH-IgM | MDP-IgA | MDP-IgG | MDP-IgM |
|---|---|---|---|---|---|---|---|---|
| First test milk | ||||||||
| KLH-IgA | 0.14 (0.39) | 0.43 (0.55) | − 0.54 (0.51) | 0.93 (0.51) | − 0.45 (0.48) | − 0.21 (0.41) | 0.86 (0.46) | − 0.07 (0.44) |
| KLH-IgG | 0.66 (0.37) | 0.26 (0.43) | 0.47 (0.36) | 0.79 (0.36) | 0.58 (0.33) | 0.41 (0.35) | 0.98 (0.37) | 0.43 (0.34) |
| KLH-IgM | 0.83 (0.84) | 0.68 (0.89) | 0.99 (0.75) | 0.78 (0.40) | 0.87 (0.20) | 0.84 (0.24) | 0.80 (0.30) | 0.97 (0.21) |
| MDP-IgA | 0.02 (0.37) | − 0.22 (0.53) | 0.59 (0.35) | 0.82 (0.71) | 0.50 (0.43) | 0.59 (0.56) | 1.00 (0.70) | 0.47 (0.45) |
| MDP-IgG | 0.86 (0.64) | 0.61 (1.25) | 0.83 (0.49) | 0.83 (0.64) | 0.75 (0.28)b | 0.59 (0.33) | 0.97 (0.30) | 0.59 (0.67) |
| MDP-IgM | − 0.25 (4.68) | − 0.24 (4.79) | 1.00 (0.99) | NE | 0.98 (0.29) | 0.72 (0.44) | NE | 0.92 (1.40) |
| Pre-parturition serum | ||||||||
| KLH-IgA | − 0.21 (0.23) | − 0.13 (0.30) | 0.40 (0.23) | 0.20 (0.32) | 0.63 (0.23) | 0.92 (0.17) | 0.55 (0.26)b | 0.80 (0.19) |
| KLH-IgG | − 0.12 (0.23) | 0.30 (0.31) | − 0.02 (0.25) | 0.60 (0.36) | − 0.40 (0.29) | − 0.22 (0.26) | 0.43 (0.26) | − 0.44 (0.26) |
| KLH-IgM | − 0.19 (0.32) | − 0.59 (0.42) | 0.48 (0.36) | 0.45 (0.49) | 0.58 (0.38) | 0.94 (0.52)b | 0.45 (0.39) | 0.85 (0.33) |
| MDP-IgA | − 0.28 (0.23) | 0.03 (0.31) | 0.45 (0.24) | 0.23 (0.33) | 0.39 (0.25) | 0.79 (0.21) | 0.98 (0.24) | 0.68 (0.24) |
| MDP-IgG | 0.04 (0.33) | 0.35 (0.43) | 0.70 (0.32) | 0.99 (0.35) | − 0.03 (0.35) | 0.41 (0.31) | 0.82 (0.35) | − 0.16 (0.37) |
| MDP-IgM | − 0.43 (0.29) | − 0.30 (0.35) | 0.43 (0.30) | − 0.04 (0.44) | 0.36 (0.31) | 0.89 (0.30) | 0.23 (0.33) | 0.79 (0.31) |
| Milk production | ||||||||
| Milk yield | 0.25 (0.17) | − 0.02 (0.28) | 0.04 (0.18) | 0.36 (0.26) | − 0.07 (0.19) | 0.12 (0.18) | 0.15 (0.20) | − 0.10 (0.20) |
| LASCS | NE | 0.03 (0.29) | NE | NE | NE | − 0.42 (0.87) | 0.21 (0.27) | − 0.15 (0.24) |
| Fat % | − 0.15 (0.13) | 0.15 (0.21) | NE | NE | NE | 0.00 (0.14) | 0.09 (0.15) | 0.08 (0.15) |
| Protein % | 0.00 (0.12) | 0.23 (0.20) | NE | NE | NE | 0.08 (0.13) | 0.14 (0.14) | 0.13 (0.14) |
Numbers in parenthesis are the standard errors
Bold characters highlight significant genetic correlations
The natural antibodies are coded as follows: MDP Muramyl dipeptide, KLH Keyhole limpet hemocyanin, IgA Immunoglobulin A, IgG Immunoglobulin G, IgM Immunoglobulin M
LASCS lactation average somatic cell score; NE not estimable
aVariance components for correlations were estimated using a square root transformation
bSuggestive significance (0.05 < p-value < 0.10)