数字农科院2.0

Epigenetic Landscape Is Largely Shaped by Diversiform Transposons in Aegilops tauschii

文献类型： 外文期刊

作者： Chuizheng Kong;Guangyao Zhao;Lifeng Gao;Xiuying Kong;Daowen Wang;Xu Liu;Jizeng Jia

作者机构：

关键词： chromatin accessibility;chromatin state;histone modification;transposons;wheat

期刊名称： International Journal of Molecular Sciences

ISSN： 1661-6596

年卷期： 2023 年 24 卷 11 期

页码：

收录情况： SCIE（2023版）

摘要： Transposons (TEs) account for more than 80% of the wheat genome, the highest among all known crop species. They play an important role in shaping the elaborate genomic landscape, which is the key to the speciation of wheat. In this study, we analyzed the association between TEs, chromatin states, and chromatin accessibility in Aegilops tauschii, the D genome donor of bread wheat. We found that TEs contributed to the complex but orderly epigenetic landscape as chromatin states showed diverse distributions on TEs of different orders or superfamilies. TEs also contributed to the chromatin state and openness of potential regulatory elements, affecting the expression of TE-related genes. Some TE superfamilies, such as hAT-Ac, carry active/open chromatin regions. In addition, the histone mark H3K9ac was found to be associated with the accessibility shaped by TEs. These results suggest the role of diversiform TEs in shaping the epigenetic landscape and in gene expression regulation in Aegilops tauschii. This has positive implications for understanding the transposon roles in Aegilops tauschii or the wheat D genome.

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