Skip to Main Content
Methods for screening Port-Orford-cedar for resistance to Phytophthora lateralisAuthor(s): Everett M. Hansen; Paul Reeser; Wendy Sutton; Richard A. Sniezko
Source: In: Sniezko, Richard A.; Yanchuk, Alvin D.; Kliejunas, John T.; Palmieri, Katharine M.; Alexander, Janice M.; Frankel, Susan J., tech. coords. Proceedings of the fourth international workshop on the genetics of host-parasite interactions in forestry: Disease and insect resistance in forest trees. Gen. Tech. Rep. PSW-GTR-240. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. pp. 181-188
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
PDF: Download Publication (2.88 MB)
DescriptionPort-Orford-cedar (Chamaecyparis lawsoniana (A. Murray) Parl.) (POC) is an economically and ecologically valuable tree in the forests of southwest Oregon and northern California and in the horticultural trade worldwide. Phytophthora lateralis, the aggressive, invasive cause of POC root disease, was introduced to the native range of POC about 1950, and has since killed trees along roads and streams throughout the forest area where the tree grows. The federal forest management agencies responded with an integrated disease management program designed to slow further spread of the pathogen in order to protect remaining POC and restore the species with planted resistant stock in impacted areas. Various short-term resistance screening methods have been used since the 1980s. Ultimately, in any resistance program, the screening assays have to be ground truthed using field trials and the screening methods updated and refined to assist in resistance evaluations. In this paper we describe and compare the various inoculation methods and screening tests we use to evaluate POC parents and their progenies for resistance and offer evolving insights on their utility. This should provide food for thought for other newer resistance programs working with other pathogens or insects.
- You may send email to firstname.lastname@example.org 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.
CitationHansen, Everett M.; Reeser, Paul; Sutton, Wendy; Sniezko, Richard A. 2012. Methods for screening Port-Orford-cedar for resistance to Phytophthora lateralis. In: Sniezko, Richard A.; Yanchuk, Alvin D.; Kliejunas, John T.; Palmieri, Katharine M.; Alexander, Janice M.; Frankel, Susan J., tech. coords. Proceedings of the fourth international workshop on the genetics of host-parasite interactions in forestry: Disease and insect resistance in forest trees. Gen. Tech. Rep. PSW-GTR-240. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. pp. 181-188.
Keywordsforest disease and insect resistance, evolutionary biology, climate change, durable resistance
- Genetic conservation and restoration of Chamaecyparis lawsoniana (Port-Orford-cedar) in the face of a non-native pathogen and changing climate – on the road to success
- Ecology, pathology, and management of Port-Orford-Cedar (Chamaecyparis lawsoniana).
- Ground verification of aerial for Port-Orford-cedar root disease in Southwest Oregon.
XML: View XML