Group I introns, as self-splicing ribozymes, have been very important in the evolution of fungi. In this study, a set of group I introns have been described within the nuclear small and large subunit rRNAs of several fungi. DNA extraction, ribosomal DNA amplification, sequencing, secondary structure analysis and phylogenetic analysis were performed, which led to the conclusion that the evolutionary history of group I introns has been processed as multiple insertions over a prolonged time by horizontal transmission, followed by the loss of the ability to insert into new loci, followed by an extended time of vertical inheritance, including reduction in size and loss of secondary structure segments, followed by the complete loss of group I introns.
|Commitee:||Morris, Paul, Phuntumart, Vipaporn|
|School:||Bowling Green State University|
|School Location:||United States -- Ohio|
|Source:||MAI 57/05M(E), Masters Abstracts International|
|Keywords:||Group i intron, Phylogenetic tree, Secondary structure|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be