Epigenomic diversity in a global collection of Arabidopsis thaliana accessions

By Taiji Kawakatsu, S. C. Huang, Florian Jupe, Eriko Sasaki, Robert J. Schmitz, M. Urich, R. Castanon, Joseph R. Nery, Cesar Barragan, Yupeng He and 13 more. Cell, 2016

646 citations recorded by the source corpus.

SUMMARY The epigenome orchestrates genome accessibility, functionality and three-dimensional structure. Because epigenetic variation can impact transcription and thus phenotypes, it may contribute to adaptation. Here we report 1,107 high-quality single-base resolution methylomes and 1,203 transcriptomes from the 1001 Genomes collection of Arabidopsis thaliana. Although the genetic basis of methylation variation is highly complex, geographic origin is a major predictor of genome-wide DNA methylation levels and of altered gene expression caused by epialleles. Comparison to cistrome and epicistrome datasets identifies associations between transcription factor binding sites, methylation, nucleotide variation and co-expression modules. Physical maps for nine of the most diverse genomes reveals how transposons and other structural variants shape the epigenome, with dramatic effects on immunity genes. The 1001 Epigenomes Project provides a comprehensive resource for understanding how variation in DNA methylation contributes to molecular and non-molecular phenotypes in natural populations of the most studied model plant.

Subfields: Molecular Biology, Plant Science

View Paper: https://www.semanticscholar.org/paper/73eb873869d5bb2f68c0c9680ee1abd573bc2c31

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In Molecular Biology

  1. Ronan C. O’Malley
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  1. Ronan C. O’Malley
  2. Joseph R. Ecker

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