The genomic basis of adaptation to calcareous and siliceous soils in Arabidopsis lyrata
Edaphic conditions are important determinants of plant fitness. While much has been learnt in recent years about plant adaptation to heavy metal contaminated soils, the genomic basis underlying adaptation to calcareous and siliceous substrates remains largely unknown. We performed a reciprocal germi...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
09 November 2018
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| In: |
Molecular ecology
Year: 2018, Jahrgang: 27, Heft: 24, Pages: 5088-5103 |
| ISSN: | 1365-294X |
| DOI: | 10.1111/mec.14930 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1111/mec.14930 Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1111/mec.14930 
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| Verfasserangaben: | Alessia Guggisberg, Xuanyu Liu, Léonie Suter, Guilhem Mansion, Martin C. Fischer, Simone Fior, Marie Roumet, Ruben Kretzschmar, Marcus A. Koch, Alex Widmer |
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| 245 | 1 | 4 | |a The genomic basis of adaptation to calcareous and siliceous soils in Arabidopsis lyrata |c Alessia Guggisberg, Xuanyu Liu, Léonie Suter, Guilhem Mansion, Martin C. Fischer, Simone Fior, Marie Roumet, Ruben Kretzschmar, Marcus A. Koch, Alex Widmer |
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| 520 | |a Edaphic conditions are important determinants of plant fitness. While much has been learnt in recent years about plant adaptation to heavy metal contaminated soils, the genomic basis underlying adaptation to calcareous and siliceous substrates remains largely unknown. We performed a reciprocal germination experiment and whole-genome resequencing in natural calcareous and siliceous populations of diploid Arabidopsis lyrata to test for edaphic adaptation and detect signatures of selection at loci associated with soil-mediated divergence. In parallel, genome scans on respective diploid ecotypes from the Arabidopsis arenosa species complex were undertaken, to search for shared patterns of adaptive genetic divergence. Soil ecotypes of A. lyrata display significant genotype-by-treatment responses for seed germination. Sequence (SNPs) and copy-number variants (CNVs) point towards loci involved in ion transport as the main targets of adaptive genetic divergence. Two genes exhibiting high differentiation among soil types in A. lyrata further share trans-specific single nucleotide polymorphisms with A. arenosa. This work applies experimental and genomic approaches to study edaphic adaptation in A. lyrata and suggests that physiological response to elemental toxicity and deficiency underlies the evolution of calcareous and siliceous ecotypes. The discovery of shared adaptive variation between sister species indicates that ancient polymorphisms contribute to adaptive evolution. | ||
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