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The Relation Between Reproductive Phenology and Reproductive Output in Determining the Gametic Pool Profile in a Douglas-Fir Seed Orchard

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A 15-year-old, Douglas-fir, full-sib seed orchard with 97 families was studied to establish the relation between reproductive phenology and reproductive output. Both male and female strobili development was monitored throughout the flowering season, and seed-cone counts and male strobili productions were determined. The overall potential gametic contributions of each family were estimated in terms of proportional contributions to the seed crop and parental balance. Families varied greatly in both seed-cone and pollen contributions. The top 5 contributors of cones were different from the top 5 pollen contributors. Assessing seed-cone and pollen contributions prior to cone induction or supplemental mass pollination will be valuable for increasing the genetic value of orchard seed. Estimates of the genetic value of the orchard crop should be calculated after completion of a parental balance study focused on both seed and pollen contributions and their reproductive phenology timing. For. Sci. 37(3):827-835.
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Keywords: Reproductive phenology; pollen; reproductive output; seed

Document Type: Journal Article

Affiliations: Professor and Director, Belle W. Baruch Forest Science Institute, Clemson University, P.O. Box 596, Georgetown, SC 29442

Publication date: 1991-08-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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