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An annual pollen-restorer sugarbeet (Beta vulgaris L.) inbred, was studied to determine if its cytoplasm had changed from sterile to fertile. Data showed that the fertility expressed by the restorer inbred was the result of genetic factors and not cytoplasmic reversion. Linkage tests with the restorer gene (Rf2)showed independence with five other sugarbeet characters of the YRB (yellow root, red hypocotyl, annualness) linkage group, m (monogerm), and vi4 (virescens).
Key Words: Sugarbeet genetics Cytoplasmic male sterility
2 Former Research Assistant, Department of Plant Science, Utah State University (presently at: Department of Agronomy, Purdue University, Lafayette, IN 47907); and Research Geneticist, ARS, USDA, Crops Research Lab UMC 63, Utah State University, Logan, UT 84322.
Received for publication June 18, 1973.
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