The allotetraploid origin and asymmetrical genome evolution of the common carp Cyprinus carpio

文献类型： 外文期刊

第一作者： Xu, Peng

作者： Xu, Peng;Xu, Jian;Jiang, Yanliang;Zhao, Zixia;Zhang, Hanyuan;Xu, Peng;Chen, Lin;Zhou, Zhixiong;Peng, Wenzhu;Wu, Yidi;Chen, Baohua;Pu, Fei;Wang, Hui;Xu, Peng;Xu, Peng;Liu, Guangjian;Jiang, Wenkai;Jia, Zhiying;Sun, Xiaowen;Sun, Yonghua;Feng, Jianxin;Luo, Jing;Chai, Jing;Wang, Hui;Dong, Chuanju

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.919； 五年影响因子：15.805 ）

ISSN： 2041-1723

年卷期： 2019 年 10 卷

页码：

收录情况： SCI

摘要： Common carp (Cyprinus carpio) is an allotetraploid species derived from recent whole genome duplication and provides a model to study polyploid genome evolution in vertebrates. Here, we generate three chromosome-level reference genomes of C. carpio and compare to related diploid Cyprinid genomes. We identify a Barbinae lineage as potential diploid progenitor of C. carpio and then divide the allotetraploid genome into two subgenomes marked by a distinct genome similarity to the diploid progenitor. We estimate that the two diploid progenitors diverged around 23 Mya and merged around 12.4 Mya based on the divergence rates of homoeologous genes and transposable elements in two subgenomes. No extensive gene losses are observed in either subgenome. Instead, we find gene expression bias across surveyed tissues such that subgenome B is more dominant in homoeologous expression. CG methylation in promoter regions may play an important role in altering gene expression in allotetraploid C. carpio.

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