Dissertation/Thesis Abstract

Evolution of Group I Introns in the Nuclear Ribosomal RNA Genes of Dothideomycetes
by Chen, Xing, M.S., Bowling Green State University, 2010, 40; 10817833
Abstract (Summary)

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.

Indexing (document details)
Advisor: Rogers, Scott
Commitee: Morris, Paul, Phuntumart, Vipaporn
School: Bowling Green State University
Department: Biological Sciences
School Location: United States -- Ohio
Source: MAI 57/05M(E), Masters Abstracts International
Subjects: Biology
Keywords: Group i intron, Phylogenetic tree, Secondary structure
Publication Number: 10817833
ISBN: 9780355844108
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