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Home → Publications → Tree Improvement and Genetics → Southern Forest Tree Improvement Conference → 12th Southern Forest Tree Improvement Conference (1973) → Location Differences and Their Influence on Heratibility Estimates and Gain Predictions for Ten Year-Old Loblolly Pine

Location Differences and Their Influence on Heratibility Estimates and Gain Predictions for Ten Year-Old Loblolly Pine

Heritability estimates and predictions of gain from simple mass selection among 75 ten-year-old, open-pollinated families of loblolly pine growing in two locations indicated that the influence of location differences varied according to the trait under consideration. Values differed between locations, but no more than would have been expected from published reports. Estimates and predictions from combined data, however, indicated substantial upward bias arising from interactions between locations and families in some of the separate location values. Biases were apparently more serious for tracheid length, diameter, volume, and dry weight than for specific gravity and "cronartium score" (an index of fusiform rust infection).


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Author(s): J. A. Barker

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1973