The Chromosome-Level Assembly of Ramie (Boehmeria Nivea L.) Genome Provides Insights into Molecular Regulation of Fiber Fineness

文献类型： 外文期刊

第一作者： Chen, Kunmei

作者： Chen, Kunmei;Luan, Mingbao;Chen, Ping;Xiong, Heping;Chen, Jikang;Gao, Gang;Wang, Xiaofei;Yu, Chunming;Zhu, Aiguo;Ming, Yao;Chen, Junhui;Wu, Bin;Bai, Mingzhou;Zhang, Qianqian;Jian, Jianbo;Wu, Bin;Jian, Jianbo

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关键词： Ramie (Boehmeria nivea L; ); genome sequencing; comparative transcriptome; fiber fineness; QTL; fiber development

期刊名称：JOURNAL OF NATURAL FIBERS （ 影响因子：3.5； 五年影响因子：3.7 ）

ISSN： 1544-0478

年卷期： 2023 年 20 卷 1 期

页码：

收录情况： SCI

摘要： Ramie (Boehmeria nivea L.), belonging to Urticaceae, is principally used for fabric production. It is a well-known natural fiber material for ancient clothing. Despite its important position and application value, the understanding on genetic regulation mechanism of fiber quality is limited. Here, we generate a chromosome-scale, high-quality reference genome of ramie, in which, approximately 90.2% of the assembled sequences have been anchored to 14 pseudochromosomes. Totally 27,664 protein-coding genes are predicted which cover 268.24 Mb region of the genome. Comparative genomic analysis reveals that 2,047 and 796 gene clusters expand and contract, respectively, underlying significant genes in plant hormone signal transduction and cellulose/lignin biosynthesis pathways. An integrative analysis combining quantitative trait loci (QTL), comparative transcriptomic data, and cytological experiments unravels the molecular regulatory mechanism of ramie fiber fineness, especially the critical regulating role of ethylene. This study would lay a solid foundation for the research of molecular biology in ramie and provide valuable reference for the improvement of high-quality fiber varieties.

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