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Genetic Variation Among and Within Three Loblolly Pine Stands in Georgia

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Wind-pollinated seeds were collected from loblolly pine stands in the Flatwoods, Upper Coastal Plain, and Piedmont of Georgia and outplanted in the Upper Coastal Plain. At age 15, differences among provenances were highly significant for survival, height, dbh, tree and plot volumes, and resistance to fusiform rust. Differences among mother trees within provenances were highly significant for survival, height, volume per plot, and stem crook. There was more variation among provenantes than among mother trees within provenances for all traits except volume per plot, for which the two sources of variation were about equal. Additive genetic variances based on mother trees without regard to provenance were 1.5 to 17.0 times greater than those based on mother trees within provenances. In conclusion, selections should be made among provenances first and then among mother trees within provenances. Forest Sci. 20:272-275.

Keywords: Physiographic region; Pinus taeda; additive genetic variance; mother tree; provenance

Document Type: Journal Article

Affiliations: Associate Plant Geneticist, USDA Forest Service, Southeast. For. Exp. Stn. Macon, Ga. 31208

Publication date: September 1, 1974

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