{"title":"New insights into the phylogeny and infrageneric taxonomy of <i>Saussurea</i> based on hybrid capture phylogenomics (Hyb-Seq).","authors":"Liansheng Xu, Zhuqiu Song, Tian Li, Zichao Jin, Buyun Zhang, Siyi Du, Shuyuan Liao, Xingjie Zhong, Yousheng Chen","doi":"10.1016/j.pld.2024.10.003","DOIUrl":null,"url":null,"abstract":"<p><p><i>Saussurea</i> is one of the largest and most rapidly evolving genera within the Asteraceae, comprising approximately 520 species from the Northern Hemisphere. A comprehensive infrageneric classification, supported by robust phylogenetic trees and corroborated by morphological and other data, has not yet been published. For the first time, we recovered a well-resolved nuclear phylogeny of <i>Saussurea</i> consisting of four main clades, which was also supported by morphological data. Our analyses show that ancient hybridization is the most likely source of deep cytoplasmic-nuclear conflict in <i>Saussurea</i>, and a phylogeny based on nuclear data is more suitable than one based on chloroplast data for exploring the infrageneric classification of <i>Saussurea</i>. Based on the nuclear phylogeny obtained and morphological characters, we proposed a revised infrageneric taxonomy of <i>Saussurea</i>, which includes four subgenera and 13 sections. Specifically, 1) <i>S</i>. sect. <i>Cincta</i>, <i>S</i>. sect. <i>Gymnocline, S</i>. sect. <i>Lagurostemon</i>, and <i>S</i>. sect. <i>Strictae</i> were moved from <i>S</i>. subg. <i>Saussurea</i> to <i>S</i>. subg. <i>Amphilaena</i>, 2) <i>S</i>. sect. <i>Pseudoeriocoryne</i> was moved from <i>S</i>. subg. <i>Eriocoryne</i> to <i>S</i>. subg. <i>Amphilaena</i>, and 3) <i>S</i>. sect. <i>Laguranthera</i> was moved from <i>S</i>. subg. <i>Saussurea</i> to <i>S</i>. subg. <i>Theodorea</i>.</p>","PeriodicalId":20224,"journal":{"name":"Plant Diversity","volume":"47 1","pages":"21-33"},"PeriodicalIF":6.3000,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11873585/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant Diversity","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1016/j.pld.2024.10.003","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/1 0:00:00","PubModel":"eCollection","JCR":"Q1","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Saussurea is one of the largest and most rapidly evolving genera within the Asteraceae, comprising approximately 520 species from the Northern Hemisphere. A comprehensive infrageneric classification, supported by robust phylogenetic trees and corroborated by morphological and other data, has not yet been published. For the first time, we recovered a well-resolved nuclear phylogeny of Saussurea consisting of four main clades, which was also supported by morphological data. Our analyses show that ancient hybridization is the most likely source of deep cytoplasmic-nuclear conflict in Saussurea, and a phylogeny based on nuclear data is more suitable than one based on chloroplast data for exploring the infrageneric classification of Saussurea. Based on the nuclear phylogeny obtained and morphological characters, we proposed a revised infrageneric taxonomy of Saussurea, which includes four subgenera and 13 sections. Specifically, 1) S. sect. Cincta, S. sect. Gymnocline, S. sect. Lagurostemon, and S. sect. Strictae were moved from S. subg. Saussurea to S. subg. Amphilaena, 2) S. sect. Pseudoeriocoryne was moved from S. subg. Eriocoryne to S. subg. Amphilaena, and 3) S. sect. Laguranthera was moved from S. subg. Saussurea to S. subg. Theodorea.
Plant DiversityAgricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.30
自引率
6.20%
发文量
1863
审稿时长
35 days
期刊介绍:
Plant Diversity (formerly Plant Diversity and Resources) is an international plant science journal that publishes substantial original research and review papers that
advance our understanding of the past and current distribution of plants,
contribute to the development of more phylogenetically accurate taxonomic classifications,
present new findings on or insights into evolutionary processes and mechanisms that are of interest to the community of plant systematic and evolutionary biologists.
While the focus of the journal is on biodiversity, ecology and evolution of East Asian flora, it is not limited to these topics. Applied evolutionary issues, such as climate change and conservation biology, are welcome, especially if they address conceptual problems. Theoretical papers are equally welcome. Preference is given to concise, clearly written papers focusing on precisely framed questions or hypotheses. Papers that are purely descriptive have a low chance of acceptance.
Fields covered by the journal include:
plant systematics and taxonomy-
evolutionary developmental biology-
reproductive biology-
phylo- and biogeography-
evolutionary ecology-
population biology-
conservation biology-
palaeobotany-
molecular evolution-
comparative and evolutionary genomics-
physiology-
biochemistry