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The Capsella rubella genome and the genomic consequences of rapid mating system evolution
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology. Uppsala University, Science for Life Laboratory, SciLifeLab.
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2013 (English)In: Nature Genetics, ISSN 1061-4036, E-ISSN 1546-1718, Vol. 45, no 7, 831-U165 p.Article in journal (Refereed) Published
Abstract [en]

The shift from outcrossing to selfing is common in flowering plants(1,2), 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.

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2013. Vol. 45, no 7, 831-U165 p.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-204995DOI: 10.1038/ng.2669ISI: 000321005200022OAI: oai:DiVA.org:uu-204995DiVA: diva2:640871
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Available from: 2013-08-14 Created: 2013-08-13 Last updated: 2017-12-06Bibliographically approved

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Slotte, TanjaSteige, Kim

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