Parameter | Classical analyses^{a} | Equations 4 and 5 |
---|---|---|

Phenotypic variance | 13,706^{b} | 13,725^{c} |

Direct genetic variance | 917*** | 960*** |

Associative genetic variance | — | 132** |

DA genetic covariance | — | 99 NS |

Residual correlation | 0.12*** | 0.09*** |

% heritable variation^{d} | 6.7% | 20.0% |

Significance levels were obtained from likelihood-ratio tests comparing the full model to the model omitting the term of interest. **

*P*< 0.01; ****P*< 0.001; NS, not significantly different from zero; DA, direct–associative.↵

*a*In this analysis, the term**Z**_{S}**a**_{S}was omitted from the model (Equation 4).↵

*b*Obtained as .↵

*c*Obtained as .↵

*d*The percentage of heritable variation was , in which was obtained from Equation 2 by replacing true values by the corresponding estimates, giving 960 + 2 × 3 × 99 + 3^{2}× 132 = 2742 days^{2}. (In the classical analyses ).