Mitochondrial DNA insertions

There is evidence for substantial transfer of mitochondrial DNA (mtDNA) to the nuclear genome in plants. Analysis of the recently completed Arabidopsis thaliana genome sequence indicated a mtDNA insertion of 270 kilobases (kb), larger than previously described mitochondria-to-nuclear DNA insertions. In the April 24 Proceedings of the National Academy of Sciences, Stupar et al present a detailed cytological characterization of the mtDNA insertion in chromosome 2 of A.

By | April 20, 2001

There is evidence for substantial transfer of mitochondrial DNA (mtDNA) to the nuclear genome in plants. Analysis of the recently completed Arabidopsis thaliana genome sequence indicated a mtDNA insertion of 270 kilobases (kb), larger than previously described mitochondria-to-nuclear DNA insertions. In the April 24 Proceedings of the National Academy of Sciences, Stupar et al present a detailed cytological characterization of the mtDNA insertion in chromosome 2 of A. thaliana (Proc Natl Acad Sci USA 2001, 98:5099-5103). Using fiber-fluorescence in situ hybridization (fiber-FISH) they show that the insertion is about 620 kb, or 2.3 times the size estimated in original measurements. The authors suggest that the complex and repetitive nature of inserted mtDNA can result in misleading estimates of insert length, and that fiber-FISH offers a high-resolution tool for genome analysis.

Popular Now

  1. Monsanto Buys Rights to CRISPR
    The Nutshell Monsanto Buys Rights to CRISPR

    The US agribusiness secures a global, nonexclusive licensing agreement from the Broad Institute to use the gene-editing technology for agricultural applications.

  2. How Plants Evolved Different Ways to Make Caffeine
  3. ESP on Trial
    Foundations ESP on Trial

    In the 1930s, parapsychologist Joseph Banks Rhine aimed to use scientific methods to confirm the existence of extrasensory perception, but faced criticisms of dubious analyses and irreproducible results.

  4. Another DNA Vaccine for Zika Shows Promise
RayBiotech