Skip to Main Content
Genetic variation in tolerance of Douglas-fir to Swiss needle cast as assessed by symptom expression.Author(s): G.R. Jonhson
Source: Silvae Genetica. 51(2-3): 80-88
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (433 KB)
DescriptionThe incidence of Swiss needle cast on Douglas-fir has increased significantly in recent years on the Oregon coast. Genetic variation in symptoms of disease infection, as measured by foliage traits, was assessed in two series of progeny trials to determine whether these "crown health" indicators were under genetic control and correlated with tolerance; tolerance being continued growth in the presence of high disease pressure. Foliage traits generally had lower heritabilities than growth traits of crown density and color appeared to be reasonable indicators of disease tolerance. In the absence of basal-area data, assessing crown density and color can help screen for families that show tolerance to the disease.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationJonhson, G.R. 2002. Genetic variation in tolerance of Douglas-fir to Swiss needle cast as assessed by symptom expression. Silvae Genetica. 51(2-3): 80-88
Keywordsresistance, Phaeocryptopus gaeumannii, Pseudotsuga menziesii, genetic gain
- Early genetic testing of coastal Douglas-fir for Swiss needle cast tolerance.
- Seasonal carbohydrate dynamics and growth in Douglas-fir trees experiencing chronic, fungal-mediated reduction in functional leaf area
- Characterizing crown fuel distribution for conifers in the interior western United States
XML: View XML