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Cold Hardiness Testing for Douglas-Fir Tree Improvement Programs: Guidelines for a Simple, Robust, and Inexpensive Screening Method

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Operational methods are needed for screening genotypes in breeding programs for adaptive traits. In this article, we present a detailed description of one procedure for screening improved coastal Douglas-fir seedlings and saplings for cold hardiness, based on research results of the Pacific Northwest Tree Improvement Research Cooperative. Artificial freeze testing of detached shoots from genetic tests, followed by visual scoring of injury, has proved to be an efficient, reliable, and cost-effective method of screening large numbers of genotypes. Relevant research results are summarized, and practical details of this methodology are presented for straightforward implementation by Douglas-fir breeders and researchers. West. J. Appl. For. 15(3):129-136.
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Document Type: Journal Article

Affiliations: Department of Forest Sciences, University of British Columbia, 3041-2424 Main Mall, Vancouver, BC V6T 1Z4

Publication date: 2000-07-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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