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Variation in the Root Bark Phenolics/Sugar Ratio of Douglas-fir Grown in Two Plantations in Northern Idaho Item Info

Several studies have linked high phenolics/sugar ratios in the inner root bark tissue of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) to decreased susceptibility to Armillaria spp. While these studies have identified environmental factors that influence root chemistry, none have examined whether the phenolics/sugar ratio is genetically controlled. In this study, we investigated the effects of genetics and environment on the root bark chemistry of 20 families of 15-year-old Douglas-fir planted in two sites in northern Idaho. Only sugar concentrations varied significantly among families, but site was a significant source of variation for phenolics and the phenolics/sugar ratio. Family site interactions were significant for the concentrations of all measured root bark compounds as well as for the phenolics/sugar ratio. Phenotypic correlations between height and the phenolics/sugar ratio and between height and sugar concentrations were not significant. However, families with superior height growth and below-average sugar concentrations could be found at both sites. Should a high phenolics/sugar ratio prove effective in selecting genotypes for resistance to Armillaria infection, these results suggest that gains could be made more efficiently by selecting for low sugar concentrations.

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Title:
Variation in the Root Bark Phenolics/Sugar Ratio of Douglas-fir Grown in Two Plantations in Northern Idaho
Creator:
Myszewski, J.H.; Fins, L.; Moore, J.A.; Rust, M.; Mika, P.G.
Date Created (ISO Standard):
2002-03-14
Description:
Several studies have linked high phenolics/sugar ratios in the inner root bark tissue of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) to decreased susceptibility to Armillaria spp. While these studies have identified environmental factors that influence root chemistry, none have examined whether the phenolics/sugar ratio is genetically controlled. In this study, we investigated the effects of genetics and environment on the root bark chemistry of 20 families of 15-year-old Douglas-fir planted in two sites in northern Idaho. Only sugar concentrations varied significantly among families, but site was a significant source of variation for phenolics and the phenolics/sugar ratio. Family site interactions were significant for the concentrations of all measured root bark compounds as well as for the phenolics/sugar ratio. Phenotypic correlations between height and the phenolics/sugar ratio and between height and sugar concentrations were not significant. However, families with superior height growth and below-average sugar concentrations could be found at both sites. Should a high phenolics/sugar ratio prove effective in selecting genotypes for resistance to Armillaria infection, these results suggest that gains could be made more efficiently by selecting for low sugar concentrations.
Subjects:
research roots (plant components) sugar statistics
Source:
Myszewski, J.H., L. Fins, J.A. Moore, M. Rust, and P.G. Mika. 2002. Variation in the root bark phenolic / sugar ratio of Douglas-fir grown in two plantations in northern Idaho. Can. J. For. Res. 32:556-560.
Source Identifier:
Variation_in_the_Root_Bark_Phenolics-Sugar_Ratio_of_DF_Grown_in_Two_Plantations_in_Northern_Idaho_CJFR_032_2002
Type:
Text
Format:
application/pdf

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Preferred Citation:
"Variation in the Root Bark Phenolics/Sugar Ratio of Douglas-fir Grown in Two Plantations in Northern Idaho", Intermountain Forestry Cooperative, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iftnc/items/iftnc4843.html
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This document is provided by the University of Idaho Library for use by University of Idaho students, staff, and faculty. All rights to the document linked from this metadata belong to the author, rights holder, and/or provider. For more information contact The Intermountain Forestry Cooperative, https://www.uidaho.edu/cnr/ifc
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