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Home → Publications → Tree Improvement and Genetics → Southern Forest Tree Improvement Conference → 18th Southern Forest Tree Improvement Conference (1985) → Cold Tolerance Variation In Loblolly Pine Needles From Different Branch Types, Families, And Environments

Cold Tolerance Variation In Loblolly Pine Needles From Different Branch Types, Families, And Environments

The cold tolerances of loblolly pine needles from different open-pollinated families, branch types, field blocks, and test locations were measured by the electrical conductivity method. Significant differences in tolerance were found between families, "upper" and "lower" growth internodes, blocks, and locations. Family differences in tolerance were more pronounced among 1-year-old seedlings in a nursery environment than among 12- and 13-year-old trees in plantation environments. Results indicate that non-genetic sources of variation and genotype x environment interaction may bias assessments of cold tolerance genetic variation in loblolly pine.


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Author(s): T. E. Kolb, Kim C. Steiner

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1985