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植物研究 ›› 2021, Vol. 41 ›› Issue (3): 408-418.doi: 10.7525/j.issn.1673-5102.2021.03.011

• 研究报告 • 上一篇    下一篇

獐牙菜亚族植物的系统发育分析

曹倩1,2, 徐隆华1,3, 王久利1,2,4(), 张发起1, 陈世龙1   

  1. 1.中国科学院西北高原生物研究所生物适应与进化重点实验室,西宁 810003
    2.中国科学院大学,北京 100039
    3.山东省济南市农业农村局,土壤肥料站,济南 250002
    4.青海民族大学生态环境与资源学院,西宁 810007
  • 收稿日期:2020-03-25 出版日期:2021-05-20 发布日期:2021-03-24
  • 通讯作者: 王久利 E-mail:wang_jiul@163.com
  • 作者简介:曹倩(1977—),女,博士研究生,主要从事青藏高原植物系统学研究。
  • 基金资助:
    国家基金委重大国际合作项目(31110103911);青海省科技厅项目(2019-ZJ-976Q)

Molecular Phylogeny of Subtribe Swertiinae

Qian CAO1,2, Long-Hua XU1,3, Jiu-Li WANG1,2,4(), Fa-Qi ZHANG1, Shi-Long CHEN1   

  1. 1.Key Laboratory of Adaptation and Evolution of Plateau Biota,Northwest Institute of Plateau Biology,Chinese Academy of Science,Xining 810003
    2.University of Chinese Academy of Sciences,Beijing 100039
    3.Soil and Fertilizer Workstation of Agricultural and Rural Bureau of Jinan,Jinan 250002
    4.College of Ecological Environment and Resources,Qinghai Nationalities University,Xining 810007
  • Received:2020-03-25 Online:2021-05-20 Published:2021-03-24
  • Contact: Jiu-Li WANG E-mail:wang_jiul@163.com
  • About author:CAO Qian(1977—),female,doctoral student,major in plateau plant systematic and evolution.
  • Supported by:
    Under the auspices of the Major International Cooperation Program of the National Natural Science Foundation of China(31110103911);Program of Science and Technology Department of Qinghai Province(2019-ZJ-976Q)

摘要:

獐牙菜亚族(subtribe Swertiinae)是龙胆科(Gentianaceae)中分类处理较困难的一个亚族。为探讨该亚族各属之间和属内的系统关系,选取了该亚族86种及变种,采用ML和BI方法对样本的叶绿体基因matK和rbcL片段进行分析,构建了该亚族的系统发育树,用马尔科夫蒙特卡洛算法(MCMC)的分子序列贝叶斯分析推算了该亚族的关键演化时间点。结果显示:①龙胆亚族和獐牙菜亚族各自为单系,且互为姐妹类群;②獐牙菜属、假龙胆属、肋柱花属和喉毛花属均不是单系群,各属的种在系统发育树上互有交叉,特别是獐牙菜属的多个种分别聚到不同的支上,与其它属是并系关系;③獐牙菜亚族49个种在约4 Ma开始形成;④分子数据支持何廷农分类系统对于獐牙菜亚属和多枝亚属的属间划分,部分支持多枝亚属下多枝组和宽丝组的划分;⑤异型花属、獐牙菜属、假龙胆属、喉毛花和肋柱花属的属间分类以及獐牙菜属肉根亚属密花组的系统位置仍需进一步讨论。

关键词: 獐牙菜亚族, cpDNA, 系统发育, 龙胆科

Abstract:

It was difficult to classify the Subtribe Swertiinae in both taxonomical and phylogenetic in Gentianaceae. To understand the relationship and phylogeny of intergenetic and intra-genetic of Subtribe Swertiinae, 86 species and variants were performed with maximum likelihood(ML) and Bayesian inference methods(BI) based on the sequences of chloroplast DNA matK and rbcL regions. The key evolution period points of Subtribe Swertiinae were estimated through Bayesian analysis of molecular sequences using MCMC. The phylogenetic relationships of Subtribe Swertiinae inferred from molecular evidence were examined against the taxonomic circumscriptions in Ho Ting-nong system(2015). The result revealed that: ①Subtribe Gentianinae and Swertiinae were monophyletic and sister groups. ②Swertia,GentianellaComastoma and Lomatogonium were paraphyletic in relation to each other. ③Speciation of 49(85.96%) species occurred in succession after 4 Ma, and 39(68.42%) species occurred in succession after 2.5 Ma. ④With respect of intra-genetic relationships of Swertia, the taxonomic treatment between subgen. Swertia and subgen. Ophelia were supported by the phylogenies results, while the taxonomic treatment of sect. Ophelia and sect. Platynema were partially supported. ⑤The intergenetic phylogeny of Sinoswertia,Swertia, Gentianella, Comastoma and Lomatogonium need further study, the systematic position of sect. Frasera was still uncertain.

Key words: Subtribe Swertiinae, chloroplast DNA, phylogeny, Gentianaceae