Show simple item record

dc.contributor.authorJohnson, Elizabeth Joy
dc.date.accessioned2014-03-03T20:00:29Z
dc.date.available2014-03-03T20:00:29Z
dc.date.issued2001-05
dc.identifier.otherjohnson_elizabeth_j_200105_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/johnson_elizabeth_j_200105_ms
dc.identifier.urihttp://hdl.handle.net/10724/20162
dc.description.abstractThe Sex-Ratio X chromosomes of Drosophila pseudoobscura and D.persimilis are subject to drive,resulting in an excess of female offspring from Sex-Ratio fathers. The several linked loci that cause the Sex-Ratio trait are held together by inversions greatly reducing recombination between the Standard and Sex-Ratio X chromosomes. The Esterase-5 gene region,tightly linked to the Sex-Ratio complex,was used to infer Sex-Ratio molecular evolution in the sibling species D.pseudoobscura and D.persimilis . We propose that the Sex-Ratio complex in D.persimilis was stabilized when an inversion swept to fixation on the Standard X chromosome.Our data support the hypothesis that the Sex-Ratio chromosome in D.persimilis has a monophyletic origin and diverged from the Standard X chromosome approximately 400,000 years ago.This is particularly striking as the Sex-Ratio chromosome of its sibling species,D.pseudoobscura ,diverged almost a million years earlier.
dc.publisheruga
dc.rightspublic
dc.subjectMeiotic drive
dc.subjectSex-Ratio
dc.subjectMolecular Evolution
dc.subjectPhylogenetic Tree
dc.subjectEsterase-5
dc.subjectD. persimilis
dc.subjectD. pseudoobscura
dc.titleThe molecular evolution of the sex-ratio gene complex in Drosophila persimilis
dc.typeThesis
dc.description.degreeMS
dc.description.departmentGenetics
dc.description.majorGenetics
dc.description.advisorWyatt W. Anderson
dc.description.committeeWyatt W. Anderson
dc.description.committeeJohn McDonald
dc.description.committeeRodney Mauricio


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record