TABLE 3.
Genetic (rG) and phenotypic (rP) correlations among variability traits 1 .
| Lnsd1 | Lnsd2 | Lnsd3 | Lnsd4 | Ra1 | Ra2 | Ra3 | Ra4 | Ske1 | Ske2 | Ske3 | Ske4 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lnsd1 2 | 0.93 (0.02) | 0.96 (0.02) | 0.93 (0.02) | 0.28 (0.14) | 0.43 (0.15) | 0.62 (0.15) | 0.38 (0.25) | 0.09 (0.13) | — | −0.61 (0.12) | 0.45 (0.24) | |
| Lnsd2 | 0.79 (0.00) | 0.99 (0.01) | 0.99 (0.00) | 0.70 (0.07) | 0.77 (0.06) | 0.76 (0.10) | 0.70 (0.14) | 0.51 (0.10) | — | −0.68 (0.09) | 0.74 (0.17) | |
| Lnsd3 | 0.57 (0.01) | 0.74 (0.01) | 0.99 (0.01) | 0.67 (0.10) | 0.15 (0.28) | 0.50 (0.16) | 0.57 (0.19) | 0.35 (0.13) | — | −0.75 (0.10) | 0.85 (0.17) | |
| Lnsd4 | 0.76 (0.00) | 0.93 (0.00) | 0.67 (0.01) | 0.63 (0.09) | 0.70 (0.08) | 0.73 (0.12) | 0.54 (0.16) | 0.56 (0.11) | — | −0.67 (0.10) | 0.74 (0.20) | |
| Ra1 | 0.15 (0.01) | 0.49 (0.01) | 0.31 (0.01) | 0.47 (0.01) | 0.78 (0.10) | 0.69 (0.17) | 0.77 (0.19) | 0.88 (0.06) | — | −0.09 (0.21) | 0.81 (0.18) | |
| Ra2 | 0.45 (0.01) | 0.66 (0.01) | 0.43 (0.01) | 0.62 (0.01) | 0.57 (0.01) | 0.80 (0.16) | 0.99 (0.12) | 0.61 (0.15) | — | 0.15 (0.28) | 0.54 (0.28) | |
| Ra3 | 0.24 (0.01) | 0.35 (0.01) | 0.60 (0.01) | 0.32 (0.01) | 0.29 (0.01) | 0.50 (0.01) | 0.74 (0.32) | 0.32 (0.24) | — | −0.37 (0.29) | 0.50 (0.35) | |
| Ra4 | 0.46 (0.01) | 0.60 (0.01) | 0.37 (0.01) | 0.70 (0.01) | 0.48 (0.01) | 0.82 (0.00) | 0.40 (0.01) | — | — | 0.53 (0.46) | ||
| Ske1 | 0.46 (0.01) | 0.09 (0.01) | 0.07 (0.01) | 0.03 (0.01) | 0.48 (0.01) | 0.09 (0.01) | 0.04 (0.01) | 0.05 (0.01) | — | −0.17 (0.19) | 0.61 (0.19) | |
| Ske2 | -- 3 | — | — | — | — | — | — | — | — | — | — | |
| Ske3 | 0.15 (0.01) | 0.17 (0.01) | 0.21 (0.01) | 0.30 (0.01) | 0.05 (0.01) | 0.12 (0.01) | 0.18 (0.01) | — | 0.13 (0.01) | — | −0.78 (0.31) | |
| Ske4 | 0.07 (0.01) | 0.05 (0.01) | 0.11 (0.01) | 0.16 (0.01) | 0.05 (0.01) | 0.09 (0.01) | 0.07 (0.01) | 0.23 (0.01) | 0.29 (0.00) | — | 0.14 (0.01) |
The genetic correlations are presented above the diagonal while the phenotypic correlations are below the diagonal.
Lnsd, log-transformed standard deviation of milk deviations; Ra, lag-1, autocorrelation of milk deviations; Ske, skewness of milk deviations. These three variability traits were calculated based on records from the entire lactation (Lnsd1, Ra1, and Ske1, from DIM 1–305), lactation period when removing the first and last 10 days (Lnsd2, Ra2, and Ske2, from DIM 11–295), during the lactation peak period (Lnsd3, Ra3, and Ske3, from DIM 60–90), and the period consisting of each DIM, when the actual milk yield was below the expected lactation curve (ELC) fitted value (Lnsd4, Ra4, and Ske4), respectively.
-- means that the analyses did not converge.