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The predominantly selfing plant Arabidopsis thaliana experienced a recent reduction in transposable element abundance compared to its outcrossing relative Arabidopsis lyrata by Nicole de la Chaux; Takashi Tsuchimatsu; Kentaro K Shimizu; Andreas Wagner is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Background Transposable elements (TEs) are major contributors to genome evolution. One factor that influences their evolutionary dynamics is whether their host reproduces through selfing or through outcrossing. According to the recombinational spreading hypothesis, for instance, TEs can spread more easily in outcrossing species through recombination, and should thus be less abundant in selfing species. We here studied the distribution and evolutionary dynamics of TE families in the predominantly selfing plant __Arabidopsis thaliana__ and its close outcrossing relative __Arabidopsis lyrata__ on a genome-wide scale. We characterized differences in TE abundance between them and asked which, if any, existing hypotheses about TE abundances may explain these differences. ## Results We identified 1,819 TE families representing all known classes of TEs in both species, and found three times more copies in the outcrossing __A. lyrata__ than in the predominantly selfing __A. thaliana__, as well as ten times more TE families unique to __A. lyrata__. On average, elements in __A. lyrata__ are younger than elements in __A__. __thaliana__. In particular, __A. thaliana__ shows a marked decrease

Who reads The predominantly selfing plant Arabidopsis thaliana experienced a recent reduction in transposable element abundance compared to its outcrossing relative Arabidopsis lyrata?

Author

Nicole de la Chaux; Takashi Tsuchimatsu; Kentaro K Shimizu; Andreas Wagner

Publisher

BioMed Central; Springer (Biomed Central Ltd.); London: BioMed Central, 2010-; Springer Science and Business Media LLC (ISSN 1759-8753)

Published

2012

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)