Table 4.
Results of Analysis of Variance (ANOVA) using mixed models to examine differences in levels of pine weevil damage (PWD; debarked stem area cm2) between Norway spruce emblings and two types of seedlings in Trial B.
| PWD (cm2) | Plant height (cm) | |||||
|---|---|---|---|---|---|---|
| Source of variation | df | F | p | df | F | p |
| Fixed effects | ||||||
| Block | 3,629 | 13.2 | <0.0001 | 3,629 | 14.8 | <0.0001 |
| Plant type | 2,629 | 10.5 | <0.0001 | 2,629 | 86.2 | <0.0001 |
| Random effects | Var. expl. | Z-value | p | Var. expl. | Z-value | p |
| Family | 1.0% | 1.0 | 0.153 | 4.6% | 2.0 | 0.024 |
| Clone | 8.2% | 2.1 | 0.019 | 25.9% | 6.4 | <0.0001 |
Models included block and plant type (emblings, unpruned seedlings, and pruned seedlings) as fixed factors, and half-sib family and clone (within family) as random factors. Var. expl. for random effects indicates the percentage of total random variance (Family, Clone, and Residual) explained by each component.