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Pervasive population genomic consequences of genome duplication in Arabidopsis arenosa

Monnahan, Patrick; Kolář, Filip; Baduel, Pierre; Sailer, Christian; Koch, Jordan; Horvath, Robert; Laenen, Benjamin; Schmickl, Roswitha; Paajanen, Pirita; Šrámková, Gabriela; Bohutínská, Magdalena; Arnold, Brian; Weisman, Caroline M.; Marhold, Karol; Slotte, Tanja; Bomblies, Kirsten; Yant, Levi

Authors

Patrick Monnahan

Filip Kolář

Pierre Baduel

Christian Sailer

Jordan Koch

Robert Horvath

Benjamin Laenen

Roswitha Schmickl

Pirita Paajanen

Gabriela Šrámková

Magdalena Bohutínská

Brian Arnold

Caroline M. Weisman

Karol Marhold

Tanja Slotte

Kirsten Bomblies

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LEVI YANT LEVI.YANT@NOTTINGHAM.AC.UK
Associate Professor of Evolutionarygenomics



Abstract

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 of purifying selection, differences in linked selection, and rampant gene flow from diploids. Initial masking of deleterious mutations, faster rates of nucleotide substitution, and interploidy introgression likely conspire to shape the evolutionary potential of polyploids.

Journal Article Type Article
Publication Date Mar 1, 2019
Journal Nature Ecology and Evolution
Print ISSN 2397-334X
Electronic ISSN 2397-334X
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 3
Issue 3
Pages 457-468
APA6 Citation Monnahan, P., Kolář, F., Baduel, P., Sailer, C., Koch, J., Horvath, R., …Yant, L. (2019). Pervasive population genomic consequences of genome duplication in Arabidopsis arenosa. Nature Ecology and Evolution, 3(3), 457-468. https://doi.org/10.1038/s41559-019-0807-4
DOI https://doi.org/10.1038/s41559-019-0807-4
Publisher URL https://www.nature.com/articles/s41559-019-0807-4

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