High genetic variation and moderate to high values for genetic parameters of Picea abies resistance to Pissodes strobi

摘要: Genetic parameters of Picea abies resistance to the white pine weevil (Pissodes strobi Peck) were estimated from 193 full-sib and 166 half-sib families in six 10-year-old progeny trials. The family individual heritability values for cumulative attack rate between ages 6 10 (CWA6–10) high moderate both (0.61 0.28, respectively) (0.85 0.40, respectively), indicating strong genetic control this trait Norway spruce. fact that specific combining ability (SCA) variance represents 35 % general (GCA) suggests non-additive (dominant) effects are weak. type B correlations found CWA6–10 (\( {\widehat{r}}_{\mathrm{B}}=0.96 \) \( {\widehat{r}}_{\mathrm{B}}=0.81 families) indicate ranks stable across sites. For three five sites with levels, not significant tree height at age 5. Moderate positive detected diameter {\widehat{r}}_{\mathrm{A}} 0.29 0.60), but showing good growth can be found. These results suggest improvement spruce achieved successfully without adversely affecting growth.