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An Analysis of Methods for the Selection of Trees from Wild Stands

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The commonly applied comparison-tree method of selection is analyzed as a form of within-family selection. If environmental variation among comparison- and select-tree groups, c², is a relatively small proportion (17 percent or less with 5 comparison trees) of the total variation, comparison-tree selection will result in less genetic improvement than individual-tree selection. Even if c² is large, individual-tree selection may be more effective than comparison-tree selection if comparison and candidate trees are related. Estimates of c² and of relationships among trees in wild stands derived mainly from published reports suggest that comparison-tree selection may in fact result in less genetic gain than individual-tree selection in many tree species. In any case, comparison-tree selection will seldom be much more effective than individual-tree selection. Development of alternate techniques for applying site corrections in the selection of superior trees is suggested. Forest Sci. 20:2-16.
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Keywords: Pinus rigida; base-line selection; phenotypic selection

Document Type: Journal Article

Affiliations: Associate Professor of Forest Genetics, Yale University, School of Forestry and Environmental Studies, New Haven, Connecticut 06511

Publication date: 1974-03-01

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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