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Inheritance of Spiral Grain in Young Loblolly Pine

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A study of spiral grain on material from 52 control-pollinated families of 4-year-old loblolly pine (Pinus taeda) indicated that genetic variation in this trait is of the nonadditive type. The study involved 1,043 trees, and spirality was measured in that portion of juvenile wood where spirality often attains maximum values. Results suggest that mass selection to reduce spiral grain will not be very effective if the pattern for older trees is similar to that of the young trees studied. Spirality bad enough to cause serious degrade in sawn or veneer products rarely occurred; this raises some question as to whether spiral grain in loblolly pine is a serious problem. The reference or datum from which degree of spirality is determined is important; since spirality was measured as deviation from pith in this study, results must be interpreted in this light.
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Document Type: Journal Article

Affiliations: Laboratory Technician, N. C. State University

Publication date: 1968-12-01

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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