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    Author(s): D. T. Cooper; Robert B. Ferguson
    Date: 1977
    Source: In: Southern Forest Tree Improvement Conference 14:70-77.
    Publication Series: Paper (invited, offered, keynote)
    Station: Southern Research Station
    PDF: View PDF  (424.17 KB)


    Estimates of genetic gains and of juvenile-mature correlations in small-plot breeding experiments may be inflated because trees that grow rapidly early continue to be the largest trees, and trees that begin slowly usually stay small. A procedure which takes missing trees, relative sizes and distances between competing trees, and the intensity of competition into consideration was used to adjust diameter measurements in small-plot cottonwood clonal breeding experiments. The F ratio of clone to error mean square was increased and predicted genotypic gain was decreased.

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    Cooper, D. T.; Ferguson, Robert B. 1977. Removal of Competition Bias from Forest Genetics Experiments. In: Southern Forest Tree Improvement Conference 14:70-77.


    Cottonwood, genotypic gain

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