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Sterility in Sudangrass: II. Random and Nonrandom | Partial-Sterility¹

Synopsis: Plants classified as having random partial-sterility possessed normal appearing reproductive organs, although approximately 50% seed failure and 50% pollen abortion occurred. It was believed that this type of sterility was due to cryptic structural hybridity. Abnormal pistil development was characteristic of plants classified as nonrandom partial-sterile. The breeding behavior suggested that this character was genie controlled.

² Formerly Graduate Assistant, Department of Agronomy, University of Wisconsin, now Geneticist, Crops Research Division, ARS, USDA, Ft. Collins, Colorado.