APA: A Useful Tool for Analyses of Progeny Tests

Area Potentially Available (APA), an index of a tree's growing space, is a useful tool for adjusting family differences in basal area growth caused by differences in local density. APA also has utility in assessing family responses to changes in local density and to interfamily competition. Two loblolly pine progeny tests are analyzed to illustrate procedures, and the results have implications for testing and deployment of genetically improved varieties.


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Author(s): Samuel B. Land, Jr., Warren L. Nance

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1987

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