Effects of Wolbachia Bacteria on Several Insect Species
Giordano, Rosanna
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https://hdl.handle.net/2142/86476
Description
Title
Effects of Wolbachia Bacteria on Several Insect Species
Author(s)
Giordano, Rosanna
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, Microbiology
Language
eng
Abstract
With the exception of Gryllus firmus all other members of the genus Gryllus tested were found to be infected with Wolbachia. Gryllus rubens was found to be infected with a strain different from that found in G. integer and G. pennsylvanicus. However, specimens from the Davis, CA and Las Cruces, NM populations of G. integer were infected with both rubens- and integer-type bacteria and some individuals in Las Cruces, NM were doubly infected with both. G. pennsylvanicus populations in nearly all localities sampled on the northeastern American continent, as well as a population in Farina, IL, were found to be infected with the pennsylvanicus- and rubens-type strains, and as in G. integer some individuals were doubly infected with both strains of bacteria. Based on the incompatibilities previously reported between these species of Gryllus, as well as the degree of difference at the level of the cell division ftsZ gene between the strains of Wolbachia they harbor, we predict that the integer-, pennsylvanicus- and rubens-type strains are bidirectionally incompatible. Wolbachia may have played a role in determining the degree of hybridization between the various Gryllus species and in this manner affected their speciation.
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