Degree Type

Thesis

Date of Award

2008

Degree Name

Master of Science

Department

Theses & dissertations (Interdisciplinary)

Major

Genetics

First Advisor

Jeanne M. Serb

Second Advisor

Kevin J. Roe

Third Advisor

John D. Nason

Abstract

The endangered winged mapleleaf, Quadrula fragosa once occurred in the Mississippi, Tennessee, Ohio, and Cumberland River basins in the United States. While the range of this species was thought to have been reduced to a single population in the St. Croix River (Minnesota/Wisconsin), individuals morphologically similar to Q. fragosa were recently recorded in Missouri, Arkansas, and Oklahoma. We employed a phylogenetic analysis of mitochondrial ND1 gene sequences. Our results indicate that Q. fragosa is a separate species and that the southern populations are genetically Q. fragosa. In addition, we developed and utilized 12 microsatellite loci to quantify genetic variation within and population structure across individuals sampled from the five populations. Results indicate a high level of genetic variation within populations, coupled with excess homozygosity, and significant genetic divergence between populations. These results are interpreted for conservation strategies under consideration by the United States Fish and Wildlife Service and United States Army Corps of Engineers.

DOI

https://doi.org/10.31274/rtd-180813-16683

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Amanda Heather Hemmingsen

Language

en

Proquest ID

AAI1454646

OCLC Number

269452802

ISBN

9780549685449

File Format

application/pdf

File Size

119 pages

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