Avoid Early Selection For Growth Rate In Cottonwood

A sample of 37 cottonwood clones from a selection program was compared with a sample of 40 random clones in a 14-year test at two sites near Stoneville, Mississippi. Throughout the test period, the select sample was slightly better in mean growth rate, but this difference decreased with age. Performance of "blue tag" clones selected at age 5 and planted commercially was good. But a group of clones selected at age 14 showed from two to three times as much improvement in diameter and height as the group selected at age 5.

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Author(s): D. T. Cooper, Robert B. Ferguson

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1979

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