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

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

*Corresponding author for this work

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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.
Original languageEnglish
Article number2168819
JournalJournal of Natural Fibers
Issue number1
Number of pages12
Publication statusPublished - 2023


  • Ramie (Boehmeria nivea L.)
  • Genome sequencing
  • Comparative transcriptome
  • Fiber fineness
  • QTL
  • Fiber development


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