Inheritance of Monoterpene Composition in Cortical Oleoresin of Slash Pine
Samples of oleoresin were obtained from 811 slash pines by wounding the branch cortex. The trees comprised 16 clones and 45 control-pollinated families, produced from matings among 21 parents. Samples were analyzed by gas-liquid chromatography. Composition varied greatly among individual trees, mostly as a result of genetic factors. Nongenetic effects included a slight decrease in the relative content of -phellandrene with increasing time of sample storage. No effects of tree age, which varied from 2 to 20 years, could be shown. Variation in content of -pinene and myrcene was concluded to be controlled by two alleles at a single locus, with high amounts being dominant over low. No evidence for the presence of linkage between the genes causing segregation for -pinene and myrcene content was obtained. All of the major constituents (α-pinene, -pinene, myrcene, and -phellandrene) showed very strong broad-sense heritabilities and at least moderately strong narrow-sense heritabilities. Forest Sci. 17:381-387.
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Document Type: Journal Article
Affiliations: Chief Geneticist, Southeastern Forest Exp. Sta., Forest Service, USDA, Olustee, Fla.
Publication date: 1971-09-01
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