RT Journal Article
SR Electronic
T1 Pervasive population genomic consequences of genome duplication in <em>Arabidopsis arenosa</em>
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 411041
DO 10.1101/411041
A1 Patrick Monnahan
A1 Filip Kolář
A1 Pierre Baduel
A1 Christian Sailer
A1 Jordan Koch
A1 Robert Horvath
A1 Benjamin Laenen
A1 Roswitha Schmickl
A1 Pirita Paajanen
A1 Gabriela Šrámková
A1 Magdalena Bohutínská
A1 Brian Arnold
A1 Caroline M. Weisman
A1 Karol Marhold
A1 Tanja Slotte
A1 Kirsten Bomblies
A1 Levi Yant
YR 2018
UL http://biorxiv.org/content/early/2018/09/06/411041.abstract
AB Ploidy-variable species allow direct inference of the effects of chromosome copy number on fundamental evolutionary processes. While an abundance of theoretical work suggests polyploidy should leave distinct population genomic signatures, empirical data remains sparse. We sequenced ∼300 individuals from 39 populations of Arabidopsis arenosa, a naturally diploid-autotetraploid species. We find the impacts of polyploidy on population genomic processes are subtle yet pervasive, including reduced efficiency on linked and purifying selection as well as rampant gene flow from diploids. Initial masking of deleterious mutations, faster rates of nucleotide substitution, and interploidy introgression all conspire to shape the evolutionary potential of polyploids.