基于ITS和matK序列的獐牙菜亚族(龙胆科龙胆族)分子系统学  

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

作　　者：郗厚诚[1,2] 孙瑶[1,2] 薛春迎[1] 

机构地区：[1]中国科学院昆明植物研究所东亚植物多样性与生物地理学重点实验室,云南昆明650201 [2]中国科学院大学,北京100049

出　　处：《植物分类与资源学报》2014年第2期145-156,共12页Plant Diversity

基　　金：国家自然科学基金(31170194);中华人民共和国科学技术基础性工作专项(2011FY120200)

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。To understand the intergeneric relationships in Gentianaceae-Swertiinae and some infrageneric phylog- eney, a total of 68 species and 1 variant of 14 genera were performed with maximum parsimony and Bayesian infer- ence 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 re- lated to S. macrosperma. Further more, the incongruence between the phylogeny were discussed based on the mor- phological and molecular data.

关 键 词：獐牙菜亚族 系统学 ITS MATK 龙胆科 

分 类 号：Q949[生物学—植物学]