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Recurrent selection schemes for soybeans [Glycine max (L.) Merr.] that use a genetic male-sterile factor to obtain natural crosses are outlined. A basic scheme with three generations per cycle, intermating, advancing, and testing, and modifications of the scheme are discussed. Guidelines for population size and selection intensity are considered. Expected genetic progress is presented for each selection program.
Key Words: Autogamous species Expected genetic progress
2 Research Agronomist, ARS, USDA, and Professor of Crop Science, N. C. State University; and Research Geneticist, ARS, USDA, and Associate Professor of Genetics, N. C. State University, respectively.
Received for publication March 28, 1973.
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