• We are sorry, but NCBI web applications do not support your browser and may not function properly. More information
Logo of geneticsGeneticsCurrent IssueInformation for AuthorsEditorial BoardSubscribeSubmit a Manuscript
Genetics. May 1978; 89(1): 121–136.
PMCID: PMC1213822

Heterogeneity of Maize Cytoplasmic Genomes among Male-Sterile Cytoplasms

Abstract

Maize mitochondrial and chloroplast DNA's were prepared from normal (fertile) lines or single crosses and from members of the T, C, and S groups of male-sterile cytoplasms. Restriction endonucleases HindIII, BamI, EcoRI, and SalI were used to restrict the DNA, and the resultant fragments were electrophoresed in agarose gels. The results show that the N (fertile), T, C, and S cytoplasms each contained distinct mitochondrial DNA (mtDNA). These distinctive patterns were unaffected by nuclear genotype. No evidence of paternal inheritance of mtDNA was observed. Chloroplast DNA (ctDNA) from the N, C, and T cytoplasms was indistinguishable by HindIII, SalI, or EcoRI endonuclease digestion. The S cytoplasm ctDNA, however, was slightly different from that of other cytoplasms, as indicated by a slight displacement of one band in HindIII digests. The molecular weight of maize ctDNA was estimated to be as high as 88 x 106. Estimates of the minimum molecular weight of maize mtDNA ranged from 116–131 x 106, but the patterns were to complex for an unambiguous determination. Based on HindIII data, a comparison of the molecular weight of mtDNA bands common to the N, T. C, and S cytoplasms suggests that C cytoplasm most closely resembles N cytoplasm. The T and S sources are more divergent from the C and N cytoplasms. These results indicate a possible gradation of relatedness among male-sterile cytoplasms. The marked variation in mtDNA, with apparently less variation in ctDNA, represents circumstantial, but compelling, evidence that mtDNA may be involved in the male sterility and disease susceptibility traits in maize.

Full Text

The Full Text of this article is available as a PDF (3.0M).

Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Aldrich HC, Gracen VE, York D, Earle ED, Yoder OC. Ultrastructural effects of Helminthosporium maydis race T toxin on mitochondria of corn roots and protoplasts. Tissue Cell. 1977;9(1):167–177. [PubMed]

Articles from Genetics are provided here courtesy of Genetics Society of America

Formats:

Related citations in PubMed

Cited by other articles in PMC

See all...

Links

  • BioProject
    BioProject
    BioProject links
  • MedGen
    MedGen
    Related information in MedGen
  • PubMed
    PubMed
    PubMed citations for these articles

Recent Activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...