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Home → Publications → Tree Improvement and Genetics → Southern Forest Tree Improvement Conference → 19th Southern Forest Tree Improvement Conference (1987) → Clonal Variation of Tannin and Phenolic Concentrations of Cones from a Selected Poplulation of Loblolly Pine

Clonal Variation of Tannin and Phenolic Concentrations of Cones from a Selected Poplulation of Loblolly Pine

Cone samples were collected from 19 clones in a chemically treated loblolly pine seed orchard every 2 months between March 1985 and May 1986. Tannin and phenolic concentrations of the cones was quantified by chemical analysis to examine the clonal and seasonal variation and to determine if variability in tannin and phenolic concentration was related to insect susceptibility. Both tannin concentration and phenolic concentration varied throughout the cones lifecycle. Tannin concentration consistently peaked for all 14 clones at age 10 mo. Total phenolics were not found to be as consistent for all clones as were the tannins. Both tannin concentration and phenolic concentration had significant variation associated with cone age. No single clone had a consistently higher or lower overall mean tannin or mean phenolic concentration than any other clone and no relationship was found between mean tannin concentration or mean phenolic concentration of cones and seed bug and coneworm infestation levels.


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Author(s): T. N. Trembath, George R. Askew

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1987