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dc.contributor.advisorMueller, Rachel
dc.contributor.authorMelander, Scott
dc.contributor.committeememberSloan, Dan
dc.contributor.committeememberEbel, Greg
dc.date.accessioned2020-01-13T16:42:03Z
dc.date.available2020-01-13T16:42:03Z
dc.date.issued2019
dc.description2019 Fall.
dc.descriptionIncludes bibliographical references.
dc.description.abstractHybridization between populations along the path to complete reproductive isolation can provide snapshots of speciation in action. Here, we present the first comprehensive list of natural salamander hybrids and estimate genetic distances between the parental hybridizing species using a mitochondrial and nuclear gene (MT-CYB and RAG1). Salamanders are outliers among tetrapod vertebrates in having low metabolic rates and highly variable sex chromosomes. Both of these features might be expected to impact speciation; mismatches between the mitochondrial and nuclear genomes that encode the proteins for oxidative metabolism, as well as mismatches in heteromorphic sex chromosomes, can lead to reproductive isolation. We compared the genetic distances between hybridizing parental species across four main tetrapod clades that differ in metabolic rates and sex chromosome diversity: salamanders, lizards, mammals, and birds. Our results reveal no significant differences, suggesting that variation in these traits across vertebrates does not translate into predictable patterns of genetic divergence and incompatible loci in hybrids.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierMelander_colostate_0053N_15810.pdf
dc.identifier.urihttps://hdl.handle.net/10217/199832
dc.languageEnglish
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019 - CSU Theses and Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.titleNatural cases of salamander hybridization suggest a consistent relationship between genetic distance and reproductive isolation across tetrapods
dc.typeText
dcterms.rights.dplaThe copyright and related rights status of this Item has not been evaluated (https://rightsstatements.org/vocab/CNE/1.0/). Please refer to the organization that has made the Item available for more information.
thesis.degree.disciplineBiology
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)


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