Pervasive population genomic consequences of genome duplication in Arabidopsis arenosa

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

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

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 that the impacts of polyploidy on population genomic processes are subtle yet pervasive, such as 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.
Originalspracheenglisch
Seiten (von - bis)457-468
FachzeitschriftNature Ecology & Evolution
Jahrgang3
Ausgabenummer3
DOIs
PublikationsstatusVeröffentlicht - März 2019
Extern publiziertJa

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