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U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Characterizing Reproductive Phenology of Seed Orchard Clones

Phenological observations were made on fifteen clones in two first-generation loblolly pine seed orchards. A Coastal seed orchard was observed in 1986; a Virginia Piedmont seed orchard was observed in 1988. A method for illustrating clonal patterns of female and male reproductive phenology is presented. Within-clone variation in reproductive phenology was generally low. Within-tree variation was greater among crown levels (upper, middle, lower) than it was by crown aspect (north, south). These data are discussed from a seed orchard management perspective.

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Author(s): T. D. Blush

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1989

Section: General Session: Seed Orchard Management