Molecular Phylogeny of Swertiinae (GentianaceaeGentianeae) Based on Sequence Data of ITS and matK

doi:10.7677/ynzwyj201413080

Abstract

Abstract:

To understand the intergeneric relationships in GentianaceaeSwertiinae and some infrageneric phylogeney, a total of 68 species and 1 variant of 14 genera were performed with maximum parsimony and Bayesian inference methods based on the sequences of the nrDNA ITS and chloroplast DNA matK regions. The results revealed that Swertiinae is monophyletic and Bartonia is determined as the most basal genus; Comastoma, Lomatogonium and Gentianella are not monophyletic and are located in one more derived clade; in Swertia, S. sect. Rugosa and S. sect. Swertia, also S. sect. Platynema and S. sect. KingdonWardia are most closely related; Jaeschkea is most closely related to Smacrosperma. Further more, the incongruence between the phylogeny were discussed based on the morphological and molecular data.

Key words: Swertiinae, Phylogeny, ITS, matK, Gentianaceae

摘要：

为探讨獐牙菜亚族（subtribe Swertiinae）各属之间和一些属内的系统关系，本研究选取了该亚族14属68种1变种，采用最大简约法（maximum parsimony）和贝叶斯法（Bayesian inference）对样品核基因ITS和叶绿体基因matK的两个片段进行独立和联合分析。结果显示：Bartonia位于亚族的最基部；喉毛花属（Comastoma）、肋柱花属（Lomatogonium）和假龙胆属（Gentianella）都非单系，处于同一个较为进化的分支中；獐牙菜属折皱组（Swertia sect. Rugosa）和獐牙菜组（S. sect. Swertia）亲缘关系最近，宽丝组（S. sect. Platynema）和藏獐牙菜组（S. sect. KingdonWardia）亲缘关系最近；口药花属（Jaeschkea）与獐牙菜属多枝组（S. sect. Ophelia）的大籽獐牙菜（Smacrosperma）亲缘关系最近。同时讨论了獐牙菜亚族形态分类与分子数据不一致的原因。

关键词: 獐牙菜亚族, 系统学, ITS, matK, 龙胆科

CLC Number:

Q 781
Q 949

XI Hou-Cheng, SUN Yao, XUE Chun-Ying. Molecular Phylogeny of Swertiinae (GentianaceaeGentianeae) Based on Sequence Data of ITS and matK[J]. Plant Diversity, 2014, 36(02): 145-156.

郗厚诚, 孙瑶, 薛春迎. 基于ITS和matK序列的獐牙菜亚族 (龙胆科龙胆族)分子系统学[J]. Plant Diversity, 2014, 36(02): 145-156.

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