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Clonal vs. Half-Sib Seedling Orchards for Black Walnut

A tree improvement program designed to check this drain of valuable gene packages now, and to preserve them for later use is a necessity. In connection with this objective, the half-sib seedling orchard approach as proposed by the U. S. Forest Service in the Eastern Region is not adequate to provide the needed quality improvement, especially that which is needed now. The intent of this paper is to express our views as to the breeding method which will produce the greatest quantity of genetically improved seed in the shortest time. We advocate the use of the progeny-tested clonal orchard in which the second stage begins after progeny testing. A clone bank is included.

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Author(s): Charles J. Masters, Walter F. Beineke

Publication: Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference - 1972