Why sexual reproduction is so overwhelmingly common in nature despite its profound costs remains an open question in evolutionary biology. One potential explanation for the predominance of sexual reproduction resides in the benefits of genetic recombination. A likely important positive outcome of recombination is that it allows organisms to produce offspring that do not inevitably inherit harmful mutations borne by their parent(s). Consequently, asexual lineages are expected to exhibit accelerated accumulation of harmful mutations compared to sexual lineages, so that asexual lineages would eventually be driven extinct. We will evaluate the functional impact of mutation accumulation in asexual vs. sexual lineages using Potamopyrgus antipodarum, a New Zealand freshwater snail in which accelerated mutation accumulation in asexual lineages has already been documented. This research will provide the first known attempt to connect mutation accumulation at the DNA level with functional consequences at the organismal level in a species in which sexual and asexual individuals regularly coexist.

A major component of this project involves collaboration with more than 100 high school and undergraduate students in which students will make meaningful contributions to understanding how sexual reproduction influences genotypes and phenotypes. As such, this research represents a joint public and scientific effort to better understand the role of sexual reproduction in the evolution of life.

Agency
National Science Foundation (NSF)
Institute
Division of Environmental Biology (DEB)
Type
Standard Grant (Standard)
Application #
1310825
Program Officer
Samuel Scheiner
Project Start
Project End
Budget Start
2013-07-01
Budget End
2016-06-30
Support Year
Fiscal Year
2013
Total Cost
$19,630
Indirect Cost
Name
University of Iowa
Department
Type
DUNS #
City
Iowa City
State
IA
Country
United States
Zip Code
52242