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Published in Crop Sci 20:159-162 (1980)
© 1980 Crop Science Society of America
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DNA Heterogeneity Within the C Group of Maize Male-Sterile Cytoplasms1

D. R. Pring, M. F. Conde and C. S. Levings, III2

Restriction endonuclease fragment analyses of organelle DNAs from five members of the C group of male-sterile maize (Zea mays L.) cytoplasms revealed three mitochondrial DNA types, while no chloroplast DNA variation was observed. It is proposed that three subgroups of the C group be designated: CI (C cytoplasm); CII (RB, BB, and E cytoplasms); CIII (ES cytoplasm). Heterogeneity within the C group indicates the possibility of broadening the cytoplasmic base of hybrid maize production.

Key Words: Mitchondrial DNA • Chloroplast DNA • Restriction endonuclease fragment analysis

1 Contribution of AR, SEA, USDA, Inst. of Food and Agric. Sci., Dep. of Plant Pathology, Univ. of Florida, Gainesville, 32611; and Dep. of Genetics, North Carolina State Univ., Raleigh, NC 27650. Journal Series No. 1759, Florida Agric. Exp. Stn., and No. 6100, North Carolina Agric. Exp. Stn.

2 AR, SEA, USDA, Dep. of Plant Pathology, Univ. of Florida, Gainesville, Dep. of Plant Pathology, Univ. of Florida, Gainesville, and Dep. of Genetics, North Carolina State Univ., Raleigh.

Received for publication June 18, 1979.




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