Notes: Trends in Genetic Control of Juvenile Black Walnut Height Growth

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Narrow-sense heritability for black walnut height at age 10 was 0.55, and gain projections based upon selecting the tallest tree in the fastest growing 50 percent of families indicate a possible improvement of 25 percent over mean unselected height. Despite analysis of trends in variance components, heritabilities, correlations, and cumulative height over the 10-year period which indicate that the progeny test is still in a juvenile growth phase, early selection for subsequent height growth appears to be effective in this species. Forest Sci. 30:821-827.

Keywords: Gains; Juglans nigra; age-age correlations; coefficients of genetic prediction; selection covariance

Document Type: Miscellaneous

Affiliations: Research Geneticist, North Central Forest Experiment Station, Forestry Sciences Laboratory, Carbondale, IL 62901

Publication date: September 1, 1984

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