Phylogenomic analysis, cryptic species discovery, and DNA barcoding of the genus Cibotium in China based on plastome data

Frontiers in Plant Science

Plant Science

Fei Wu¹  Li-Ming Tang²  Ying-Ying Chen³  Ri-Hong Jiang³  Bo Qin³  Kai-Xiang Li³  Yao-Heng Huang³  Xian-Chun Zhang⁴  Si-Qi Liang⁵ 

[1] China National Botanical Garden, Beijing, China;Beijing Botanical Garden, Beijing, China;Beijing Floriculture Engineering Technology Research Centre, Beijing, China;Guangxi Forestry Industry Group Stock Corporation, Nanning, China;Guangxi Key Laboratory of Special Non-wood Forest Cultivation and Utilization, Guangxi Engineering and Technology Research Center for Woody Spices, Guangxi Forestry Research Institute, Nanning, China;State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, The Chinese Academy of Sciences, Beijing, China;China National Botanical Garden, Beijing, China;State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, The Chinese Academy of Sciences, Beijing, China;China National Botanical Garden, Beijing, China;College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China;

关键词: chloroplast genome;    Cibotium barometz;    Cibotium sino-burmaense;    conservation;    DNA barcoding;    endangered species;    germplasm resource;    species diversity;   

DOI  :  10.3389/fpls.2023.1183653

 received in 2023-03-10, accepted in 2023-05-02,  发布年份 2023

来源: Frontiers

【 摘 要 】

Germplasm resources are the source of herbal medicine production. The cultivation of superior germplasm resources helps to resolve the conflict between long-term population persistence and growing market demand by consistently producing materials with high quality. The fern species Cibotium barometz is the original plant of cibotii rhizoma (“Gouji”), a traditional Chinese medicine used in the therapy of pain, weakness, and numbness in the lower extremities. Long-history medicinal use has caused serious wild population decline in China. Without sufficient understanding of the species and lineage diversity of Cibotium, it is difficult to propose a targeted conservation scheme at present, let alone select high-quality germplasm resources. In order to fill such a knowledge gap, this study sampled C. barometz and relative species throughout their distribution in China, performed genome skimming to obtain plastome data, and conducted phylogenomic analyses. We constructed a well-supported plastome phylogeny of Chinese Cibotium, which showed that three species with significant genetic differences are distributed in China, namely C. barometz, C. cumingii, and C. sino-burmaense sp. nov., a cryptic species endemic to NW Yunnan and adjacent regions of NE Myanmar. Moreover, our results revealed two differentiated lineages of C. barometz distributed on the east and west sides of a classic phylogeographic boundary that was probably shaped by monsoons and landforms. We also evaluated the resolution of nine traditional barcode loci and designed five new DNA barcodes based on the plastome sequence that can distinguish all these species and lineages of Chinese Cibotium accurately. These novel findings on a genetic basis will guide conservation planners and medicinal plant breeders to build systematic conservation plans and exploit the germplasm resources of Cibotium in China.

【 授权许可】

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Copyright © 2023 Jiang, Liang, Wu, Tang, Qin, Chen, Huang, Li and Zhang