The Capsella rubella genome and the genomic consequences of rapid mating system evolution
2 Uppsala University
3 New York University [Abu Dhabi]
4 Department of Molecular Biology
5 URGI - Unité de Recherche Génomique Info
6 CAS - Chinese Academy of Sciences
7 Department of Evolutionary Biology
8 Department of Biology
9 MU / MUNI - Masaryk University [Brno] = Masarykova univerzita [Brno] = Université Masaryk [Brno]
10 Department of Biology
11 Colby-Sawyer College
12 Department of Ecology and Evolutionary Biology
13 Department of Plant Sciences
14 Department of Evolution and Ecology
15 Department of Ecology and Evolutionary Biology
16 Princeton University
17 McGill University = Université McGill [Montréal, Canada]
18 GMI - Gregor Mendel Institute of Molecular Plant Biology
19 Hudson Alpha Institute for Biotechnology
20 JGI - Joint Genome Institute
21 U.S. Department of Energy
22 UC Berkeley - University of California [Berkeley]
23 Centre for the Analysis of Genome Evolution and Function
- Fonction : Auteur
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- ORCID : 0000-0001-6020-5102
- Fonction : Auteur
- PersonId : 747511
- IdHAL : florian-maumus
- ORCID : 0000-0001-7325-0527
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- Fonction : Auteur
- PersonId : 736048
- IdHAL : hadi-quesneville
- ORCID : 0000-0003-3001-4908
- IdRef : 137542860
Résumé
The shift from outcrossing to selfing is common in flowering plants, but the genomic consequences and the speed at which they emerge remain poorly understood. An excellent model for understanding the evolution of self fertilization is provided by Capsella rubella, which became self compatible <200,000 years ago. We report a C. rubella reference genome sequence and compare RNA expression and polymorphism patterns between C. rubella and its outcrossing progenitor Capsella grandiflora. We found a clear shift in the expression of genes associated with flowering phenotypes, similar to that seen in Arabidopsis, in which self fertilization evolved about 1 million years ago. Comparisons of the two Capsella species showed evidence of rapid genome-wide relaxation of purifying selection in C. rubella without a concomitant change in transposable element abundance. Overall we document that the transition to selfing may be typified by parallel shifts in gene expression, along with a measurable reduction of purifying selection.