Table 5.
Additive genetic variance, error variance, heritability estimates and their SEs (std. error) for levels of pine weevil damage (PWD) in Norway spruce plants in Trials A and B.
| Trait | Additive genetic variance (VG) | Error variance | Heritability (h2 = VG/VT) | h2 std. error |
|---|---|---|---|---|
| Trial A | ||||
| PWD class (0–5) | 0.136 | 0.31 | 0.31 | 0.05 |
| PWD mid-class value | 0.006 | 0.01 | 0.34 | 0.05 |
| Height (cm) | 59.2 | 69.1 | 0.46 | 0.05 |
| Trial B | ||||
| PWD (cm2) | 0.02 | 2.0 | 0.1 | 0.04 |
| Height (cm) | 81.9 | 85.9 | 0.49 | 0.04 |
In trial A, PWD was expressed in both discrete classes (0–5) and as a continuous variable (PWD mid-class, Table 2), while in trial B damage was expressed as stem area debarked (PWD, cm2).