Natural cases of salamander hybridization suggest a consistent relationship between genetic distance and reproductive isolation across tetrapods
| dc.contributor.author | Melander, Scott, author | |
| dc.contributor.author | Mueller, Rachel, advisor | |
| dc.contributor.author | Sloan, Dan, committee member | |
| dc.contributor.author | Ebel, Greg, committee member | |
| dc.date.accessioned | 2020-01-13T16:42:03Z | |
| dc.date.available | 2020-01-13T16:42:03Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | Hybridization 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.medium | born digital | |
| dc.format.medium | masters theses | |
| dc.identifier | Melander_colostate_0053N_15810.pdf | |
| dc.identifier.uri | https://hdl.handle.net/10217/199832 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation.ispartof | 2000-2019 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.title | Natural cases of salamander hybridization suggest a consistent relationship between genetic distance and reproductive isolation across tetrapods | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). | |
| thesis.degree.discipline | Biology | |
| thesis.degree.grantor | Colorado State University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Science (M.S.) |
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