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Notes: Seasonal and Genetic Variations in Loblolly Pine Cold Tolerance

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Fifteen open-pollinated families of loblolly pine (Pinus taeda L.) were evaluated for variation in winter injury in a Kentucky progeny test at plantation age 1, and for variation in in vitro cold tolerance of needles at ages 7 and 8. Laboratory evaluations were performed on four sampling dates using the electrical conductivity method. Overall mean cold tolerance was 4.5° to 10.7°C less in November and March than in January, and January levels of tolerance differed by 4.0°C between consecutive years. Regional and family differences in both winter injury and cold tolerance were significant in all assessments. Families from the Mid-South Region were more tolerant than families from the North and South Carolina Piedmonts. Family means for January cold tolerance were significantly correlated with family mean winter injury measured 6 or 7 years previously. The results indicate potential for cold tolerance selection using laboratory screening techniques. Forest Sci. 31:926-932.

Keywords: Pinus taeda; winter injury

Document Type: Miscellaneous

Affiliations: Central Woodlands Research Center Leader, Westvaco Corporation, P.O. Box 458, Wickliffe, KY 42087

Publication date: December 1, 1985

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.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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