Patterns of Differentiation Among Allopatric Drosophila mettleri Populations

Persistent Link:
http://hdl.handle.net/10150/195412
Title:
Patterns of Differentiation Among Allopatric Drosophila mettleri Populations
Author:
Castrezana, Sergio Javier
Issue Date:
2005
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Sonoran Desert Drosophila mettleri breeds in soil soaked by the necrotic cacti juices from saguaro (Carnegiea gigantea) and cardon (Pachycereus pringlei). An isolated population on Santa Catalina Island, 300 kilometers NW of the Sonoran Desert limit, was discovered breeding in several Opuntia cacti species. Host shifts are associated with the speciation process in phytophagous insects. I tested for evidence of premating isolation, postmating isolation, and ecological differences among allopatric populations of Drosophila mettleri using a variety of approaches. No sexual isolation was detected. However, Drosophila mettleri from Santa Catalina Island shows significant behavioral and physiological differences compared with Sonoran Desert populations. Furthermore, Drosophila mettleri from Santa Catalina Island was significantly genetically differentiated from all other populations in the study. Finally, I observed sufficiently significant F1 male sterility in crosses involving the Santa Catalina Island population to consider it indicative of early postzygotic isolation.
Type:
text; Electronic Dissertation
Keywords:
Incipient speciation; Sonoran Desert; host shift; soil breeder; Drosophila mettleri
Degree Name:
PhD
Degree Level:
doctoral
Degree Program:
Ecology & Evolutionary Biology; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Markow, Therese A.
Committee Chair:
Markow, Therese A.

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titlePatterns of Differentiation Among Allopatric Drosophila mettleri Populationsen_US
dc.creatorCastrezana, Sergio Javieren_US
dc.contributor.authorCastrezana, Sergio Javieren_US
dc.date.issued2005en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractSonoran Desert Drosophila mettleri breeds in soil soaked by the necrotic cacti juices from saguaro (Carnegiea gigantea) and cardon (Pachycereus pringlei). An isolated population on Santa Catalina Island, 300 kilometers NW of the Sonoran Desert limit, was discovered breeding in several Opuntia cacti species. Host shifts are associated with the speciation process in phytophagous insects. I tested for evidence of premating isolation, postmating isolation, and ecological differences among allopatric populations of Drosophila mettleri using a variety of approaches. No sexual isolation was detected. However, Drosophila mettleri from Santa Catalina Island shows significant behavioral and physiological differences compared with Sonoran Desert populations. Furthermore, Drosophila mettleri from Santa Catalina Island was significantly genetically differentiated from all other populations in the study. Finally, I observed sufficiently significant F1 male sterility in crosses involving the Santa Catalina Island population to consider it indicative of early postzygotic isolation.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
dc.subjectIncipient speciationen_US
dc.subjectSonoran Deserten_US
dc.subjecthost shiften_US
dc.subjectsoil breederen_US
dc.subjectDrosophila mettlerien_US
thesis.degree.namePhDen_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineEcology & Evolutionary Biologyen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorMarkow, Therese A.en_US
dc.contributor.chairMarkow, Therese A.en_US
dc.contributor.committeememberBrusca, Richarden_US
dc.contributor.committeememberHuxman, Travisen_US
dc.contributor.committeememberReinthal, Peteren_US
dc.identifier.proquest1313en_US
dc.identifier.oclc137354973en_US
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