Biased gene retention during diploidization in Brassica linked to three-dimensional genome organization

文献类型： 外文期刊

第一作者： Xie, Ting

作者： Xie, Ting;Zhang, Fu-Gui;Hu, Ji-Hong;Wu, Xiao-Ming;Zhang, Hong-Yu;Wang, Xiao-Tao

作者机构：

期刊名称：NATURE PLANTS （ 影响因子：15.793； 五年影响因子：17.349 ）

ISSN： 2055-026X

年卷期： 2019 年 5 卷 8 期

页码：

收录情况： SCI

摘要： The non-random three-dimensional (3D) organization of the genome in the nucleus is critical to gene regulation and genome function. Using high-throughput chromatin conformation capture, we generated chromatin interaction maps for Brassica rapa and Brassica oleracea at a high resolution and characterized the conservation and divergence of chromatin organization in these two species. Large-scale chromatin structures, including A/B compartments and topologically associating domains, are notably conserved between B. rapa and B. oleracea, yet their KNOT structures are highly divergent. We found that genes retained in less fractionated subgenomes exhibited stronger interaction strengths, and diploidization-resistant duplicates retained in pairs or triplets are more likely to be colocalized in both B. rapa and B. oleracea. These observations suggest that spatial constraint in duplicated genes is correlated to their biased retention in the diploidization process. In addition, we found strong similarities in the epigenetic modification and Gene Ontology terms of colocalized paralogues, which were largely conserved across B. rapa and B. oleracea, indicating functional constraints on their 3D positioning in the nucleus. This study presents an investigation of the spatial organization of genomes in Brassica and provides insights on the role of 3D organization in the genome evolution of this genus.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序