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https://hdl.handle.net/2142/86478
Description
Title
Distribution of P Elements in Muscomorpha
Author(s)
Chen, Chun-Liang
Issue Date
1998
Doctoral Committee Chair(s)
Robertson, Hugh M.
Department of Study
Entomology
Discipline
Entomology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Molecular
Language
eng
Abstract
Partial P elements (some almost full-length) were recovered from genomic libraries of the three species. The sequences of these newly recovered P element homologues have shed light on the distribution and evolution of P elements. First of all, these P element homologues are ancient and now defective. Second, P elements are not confined to Drosophilidae but are in fact widespread in the infraorder Muscomorpha of Diptera. Third, phylogenetic analyses showed that P elements have evolved into distinct Lucilia and Drosophila subfamilies. Fourth, the conservation of the leucine zipper domains and GTP-binding domain of the P element transposase in these flies indicates that they were important for the activity of these P elements. Finally, given the long evolutionary history of these flies, horizontal transfers of these P elements must have occurred at recent points in time for the P elements in the three flies to be reasonably well conserved.
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