Notes: Monoterpene Composition and Fusiform Rust Resistance in Slash Pine

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Abstract:

Cortical monoterpene composition was determined for 43 relatively resistant and 42 relatively susceptible slash pine clones selected on the basis of their fusiform rust resistance breeding values. Fifty-seven percent of the clones having high proportions of -phellandrene were relatively resistant, while only 15% of the low -phellandrene clones were relatively resistant. Reasons for the relationship are not clear, but presence of the high -phellandrene gene may be linked with other traits more directly involved with resistance. Certain combinations of monoterpenes, including particular minor constituents, may be more indicative of resistance than -phellandrene alone, but further work is needed. For the present, tree improvement workers should consider determining monoterpene composition of candidate trees prior to progeny testing, and culling trees with low -phellandrene content. For. Sci. 36(2):470-475.

Keywords: Cronartium quercuum f. sp. fusiforme; P. taeda; Pinus elliottii var. elliottii; camphene; limonene; myrcene; sabinene; α-phellandrene; α-pinene; -phellandrene; -pinene

Document Type: Miscellaneous

Affiliations: Associate Professor, Department of Forestry, University of Florida

Publication date: June 1, 1990

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