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Published in Crop Sci 22:651-652 (1982)
© 1982 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Stable Cytoplasmic Male-Sterile Mutants Induced in Tift 23DB1 Pearl Millet with Mitomycin and Streptomycin 11

Glenn W. Burton and W. W. Hanna2

Stable cytoplasmic male-sterile lines are necessary for the commercial production of F1 hybrid seed of important crop plants such as sorghum (Sorghum bicolor L.) and pearl millet [Pennisetum americanum (L.) Leeke.]. The objective of this investigation was to ascertain if streptomycin and mitomycin could help to create stable cms mutants. Seeds of ‘Tilt 23DB1’ pearl millet were soaked in water solutions of 200 and 500 ppm of streptomycin, and 50 ppm of mitomycin at 5 C for 40 hours. Treated seeds were rinsed in tap water, surface dried, and planted in an isolated field along with a check of untreated seed. Head populations of 32,800, 22,300, 18,000, and 13,000 from seed treated with 0, 200, 500 ppm of streptomycin and 50 ppm of mitomycin contained progeny tested stable cytoplasmic male-sterile (cms) mutants at frequencies of 1 in 16,200, 5,575, 4,500, and 2,600, respectively. The sterility or fertility of ctns mutants crossed with 2 sterility maintainers and 6 fertility restorer inbreds of pearl millet suggests that the induced mutants have sterility maintainer and fertility restorer requirements similar to cms Tilt 23DA, and are similar cms mutants.

Key Words: Tift 23DA • Pennisetum americanum(L.)

1 Cooperative investigations of the USDA, ARS, and the Univ. of Georgia, College of Agriculture Exp. Stns., Coastal Plain Station, Agron. Dep., Tifton, GA 31793. Study supported in part by the U.S. Dep. of Energy Cont. No. DE-AS09-76EV0063

2 Research geneticists, USDA, ARS, and the Univ. of Georgia, College of Agriculture Exp. Stns., Coastal Plain Station, Agron. Dep., Tifton, GA 31793.

Received for publication August 31, 1981.




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