An Overlooked Paleotetraploidization in Cucurbitaceae

文献类型: 外文期刊

第一作者: Wang, Jinpeng

作者: Wang, Jinpeng;Li, Yuxian;Liu, Yinzhe;Yang, Nanshan;Yu, Jigao;Ma, Xuelian;Sun, Sangrong;Xia, Ruiyan;Liu, Xiaojian;Ge, Dongcen;Luo, Sainan;Liu, Yinmeng;Kong, Youting;Cui, Xiaobo;Lei, Tianyu;Wang, Li;Wang, Zhenyi;Ge, Weina;Zhang, Lan;Song, Xiaoming;Yuan, Min;Guo, Di;Pan, Yuxin;Yang, Guixian;Xiao, Yue;Sun, Jinshuai;Zhang, Cong;Li, Zhibo;Xu, Haiqing;Duan, Xueqian;Shen, Shaoqi;Wang, Xiyin;Wang, Jinpeng;Sun, Pengchuan;Li, Yuxian;Liu, Yinzhe;Yang, Nanshan;Yu, Jigao;Sun, Sangrong;Lei, Tianyu;Wang, Li;Wang, Zhenyi;Ge, Weina;Zhang, Lan;Song, Xiaoming;Yuan, Min;Guo, Di;Jin, Dianchuan;Chen, Wei;Pan, Yuxin;Liu, Tao;Wang, Xiyin;Zhang, Zhonghua;Huang, Sanwen

作者机构:

关键词: Cucurbitaceae;genomics;polyploidy;homology;gene colinearity

期刊名称:MOLECULAR BIOLOGY AND EVOLUTION ( 影响因子:16.24; 五年影响因子:18.67 )

ISSN: 0737-4038

年卷期: 2018 年 35 卷 1 期

页码:

收录情况: SCI

摘要: Cucurbitaceae plants are of considerable biological and economic importance, and genomes of cucumber, watermelon, and melon have been sequenced. However, a comparative genomics exploration of their genome structures and evolution has not been available. Here, we aimed at performing a hierarchical inference of genomic homology resulted from recursive paleopolyploidizations. Unexpectedly, we found that, shortly after a core-eudicot-common hexaploidy, a cucurbit-common tetraploidization (CCT) occurred, overlooked by previous reports. Moreover, we characterized gene loss (and retention) after these respective events, which were significantly unbalanced between inferred subgenomes, and between plants after their split. The inference of a dominant subgenome and a sensitive one suggested an allotetraploid nature of the CCT. Besides, we found divergent evolutionary rates among cucurbits, and after doing rate correction, we dated the CCT to be 90-102 Ma, likely common to all Cucurbitaceae plants, showing its important role in the establishment of the plant family.

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