Convergent evolution in Arabidopsis halleri and Arabidopsis arenosa on calamine metalliferous soils

Preite, Veronica; Sailer, Christian; Syllwasschy, Lara; Bray, Sian; Ahmadi, Hassan; Kr�mer, Ute; Yant, Levi

Abstract

© 2019 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License It is a plausible hypothesis that parallel adaptation events to the same environmental challenge should result in genetic changes of similar or identical effects, depending on the underlying fitness landscapes. However, systematic testing of this is scarce. Here we examine this hypothesis in two closely related plant species, Arabidopsis halleri and Arabidopsis arenosa, which co-occur at two calamine metalliferous (M) sites harbouring toxic levels of the heavy metals zinc and cadmium. We conduct individual genome resequencing alongside soil elemental analysis for 64 plants from eight populations on M and non-metalliferous (NM) soils, and identify genomic footprints of selection and local adaptation. Selective sweep and environmental association analyses indicate a modest degree of gene as well as functional network convergence, whereby the proximal molecular factors mediating this convergence mostly differ between site pairs and species. Notably, we observe repeated selection on identical single nucleotide polymorphisms in several A. halleri genes at two independently colonized M sites. Our data suggest that species-specific metal handling and other biological features could explain a low degree of convergence between species. The parallel establishment of plant populations on calamine M soils involves convergent evolution, which will probably be more pervasive across sites purposely chosen for maximal similarity in soil composition. This article is part of the theme issue 'Convergent evolution in the genomics era: new insights and directions'.

Citation

Preite, V., Sailer, C., Syllwasschy, L., Bray, S., Ahmadi, H., Krämer, U., & Yant, L. (2019). Convergent evolution in Arabidopsis halleri and Arabidopsis arenosa on calamine metalliferous soils. Philosophical Transactions B: Biological Sciences, 374(1777), https://doi.org/10.1098/rstb.2018.0243

• Journal Article Type: Article
• Acceptance Date: Feb 26, 2019
• Online Publication Date: Mar 31, 2019
• Publication Date: Jun 3, 2019
• Deposit Date: Feb 26, 2019
• Publicly Available Date: Mar 31, 2019
• Journal: Philosophical Transactions B: Biological Sciences
• Print ISSN: 0962-8436
• Electronic ISSN: 1471-2970
• Publisher: The Royal Society
• Peer Reviewed: Peer Reviewed
• Volume: 374
• Issue: 1777
• DOI: https://doi.org/10.1098/rstb.2018.0243
• Keywords: Converegence; Adaptation; Evolution; Selective sweep; Selection
• Public URL: https://nottingham-repository.worktribe.com/output/1587130
• Publisher URL: https://royalsocietypublishing.org/doi/10.1098/rstb.2018.0243
• Additional Information: Accepted: 2019-02-25; Published: 2019-06-03
• Contract Date: Nov 27, 2019