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Get Free AccessSignificance The epigenome influences gene regulation and genome evolution. The DNA methylomes of Arabidopisis hybrids are distinct from both parents; however, how the parental methylomes interact in hybrids is poorly understood. We discovered pervasive, nonadditive DNA methylation changes (“methylation interactions”) throughout the genome in hybrids of Col and C24 Arabidopsis accessions. Methylation interactions correlated with high levels of small interfering RNAs, known components of the RNA-directed DNA methylation (RdDM) pathway. Indeed, abrogation of RdDM activity abolished methylation interactions in filial 1 (F1) hybrids. Methylation interactions have distinct polymorphism frequencies: Regions with increased methylation compared with the parents are highly conserved, whereas regions with decreased methylation are divergent. Our results show that RdDM is required for DNA methylation interactions in hybrids.
Yanqiang Li, Cheng Zhao, Huan Huang, Heng Zhang, Huiming Zhang, Jian Kang Zhu, Qingzhu Zhang, Dong Wang, Zhaobo Lang, Li He, Lan Yang, Liang Zeng (2016). Methylation interactions in <i>Arabidopsis</i> hybrids require RNA-directed DNA methylation and are influenced by genetic variation. , 113(29), DOI: https://doi.org/10.1073/pnas.1607851113.
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Type
Article
Year
2016
Authors
12
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.1073/pnas.1607851113
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