Extensive sequence divergence between the reference genomes of Taraxacum kok-saghyz and Taraxacum mongolicum

文献类型： 外文期刊

第一作者： Lin, Tao

作者： Lin, Tao;Xu, Xia;Du, Huilong;Fan, Xiuli;Chen, Qingwen;Hai, Chunyan;Kou, Liquan;You, Hanli;Ma, Yihua;Cheng, Zhukuan;Wang, Guodong;Liang, Chengzhi;Yu, Hong;Li, Jiayang;Lin, Tao;Zhou, Zijian;Su, Xiao;Fan, Xiuli;Chen, Qingwen;Hai, Chunyan;You, Hanli;Ma, Yihua;Liang, Chengzhi;Li, Jiayang;Gao, Qiang;Deng, Lingwei;Jiang, Jinsheng;Zhang, Guomin;Li, Jiayang;Du, Huilong

作者机构：

关键词： reference genome; Taraxacum kok-saghyz; Taraxacum mongolicum; comparative genomics; natural rubber biosynthesis pathway

期刊名称：SCIENCE CHINA-LIFE SCIENCES （ 影响因子：10.372； 五年影响因子：7.587 ）

ISSN： 1674-7305

年卷期： 2022 年 65 卷 3 期

页码：

收录情况： SCI

摘要： Plants belonging to the genus Taraxacum are widespread all over the world, which contain rubber-producing and non-rubber-producing species. However, the genomic basis underlying natural rubber (NR) biosynthesis still needs more investigation. Here, we presented high-quality genome assemblies of rubber-producing T. kok-saghyz TK1151 and non-rubber-producing T. mongolicum TM5. Comparative analyses uncovered a large number of genetic variations, including inversions, translocations, presence/absence variations, as well as considerable protein divergences between the two species. Two polyploidization events were found in these two Taraxacum species, including one common ancestral whole-genome triplication of the Eudicots and one subsequent round of polyploidization. In genomes of both TK1151 and TM5, we identified the genes encoding for each step in the NR biosynthesis pathway and found that the SRPP and CPT gene families have experienced a more obvious expansion in TK1151 compared to TM5. This study will have large-ranging implications for the mechanism of NR biosynthesis and genetic improvement of NR-producing crops.

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