Paul E. HanscheDepartments of Genetics and Pomology, University of California, Davis, CA 95616
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William Beres
William BeresDepartments of Genetics and Pomology, University of California, Davis, CA 95616
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Contributor Notes
Received for publication May 10, 1980.
The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper must therefore be hereby marked advertisement solely to indicate this fact.