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. 1977 Jul;74(7):2904–2908. doi: 10.1073/pnas.74.7.2904

Unique DNA associated with mitochondria in the “S”-type cytoplasm of male-sterile maize

D R Pring *, C S Levings III †, W W L Hu †, D H Timothy †
PMCID: PMC431340  PMID: 16592420

Abstract

Mitochondrial DNAs were prepared from maize lines with normal cytoplasm and with the T, C, S, and EP sources of male-sterile cytoplasms. Agarose gel electrophoresis of these preparations revealed a main high-molecular-weight DNA band. In addition, the S cytoplasm was characterized by the presence of two faster migrating DNAs of molecular weight 3.42 to 3.48 × 106 and 4.01 to 4.10 × 106. Electron microscopy showed these unique DNAs to be of different length, but their molecular configuration was not clearly established. It is possible that these unique DNAs represent physical evidence of an episomal system previously postulated to function in the S male-sterile cytoplasm.

Keywords: episomal DNA, plasmid DNA, cytoplasmic inheritance

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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