Table 5.
Genetic and environmental correlations between litter size and birth size traits (standard error)
| Birth mass | χ2 | Birth head width | χ2 | |
|---|---|---|---|---|
| Genetic correlations | ||||
| LS direct - BS direct | 0.54 (0.23)* | 5.00 | 0.47 (0.26)* | 3.34 |
| LS direct - BS maternal | -0.30 (0.23) | 1.20 | -0.47 (0.38) | 0.30 |
| BS direct - BS maternal | 0.04 (0.32) | 0.00 | 0.34 (0.76) | 1.26 |
| Environmental correlations | ||||
| Permanent environmental | -0.35 (0.17)* | 3.00 | -0.44 (0.17)* | 4.32 |
| LS residual - BS litter | -0.67 (0.02)*** | 635.40 | -0.52 (0.02)*** | 345.22 |
LS litter size; BS birth size (mass or head width)
Statistical significance: * P < 0.1; **P < 0.01;***P < 0.001
χ2 Chi square test statistic for loglikelihood-ratio test of the covariance