Table 2. Summary of the mixed model for the analysis of cone weight, seed weight mean and variation of seed weight within individual trees in the two progeny trials.
| Fixed factors |
Cone weight |
Seed weight mean |
Seed weight variation |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| DF | F | P>F | DF | F | P>F | DF | F | P>F | ||
| Environment (E) | 1,16 | 5.6 | 0.031 | 1,16 | 8.3 | 0.011 | 1,16 | 13.7 | 0.002 | |
| Random factors | Var Comp | χ2 | P>χ2 | Var Comp | χ2 | P>χ2 | Var Comp | χ2 | P>χ2 | |
| Family (F) | 40.6±55.8 | 9.0 | 0.001 | 24±13.8 | 19.3 | 0.000 | 0.91±1.37 | 2.2 | 0.069 | |
| F × E | 57.1±59.1 | 1.9 | 0.084 | 0±0 | 0.0 | 0.500 | 0.4±1.5 | 0.1 | 0.376 | |
| (Cortegada) | 69.7±8.8 | |||||||||
| Residual | 709.9±73.5 | 85.3±9.0 | ||||||||
| (Lalin) | 22.2±2.7 | |||||||||
Abbreviations: DF, degrees of freedom; F × E, family × environment.
Environment was treated as a fixed factor, and family, blocks (not shown) and the interactions involving these terms were considered random factors. DF, F ratios and associated probability values are shown for fixed effects. REML estimates of variance components (±s.e.) and the likelihood ratio test (χ2) testing whether they are significantly greater than zero are shown for random factors. Significant probability values (P<0.05) are given in boldface. A heterogeneous residual mixed model was fitted for variation in seed weight.