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国产堇菜属的分子系统学研究
龚琴1,2,3, 周劲松4, 张永夏5, 梁冠欣6,2, 陈红锋7, 邢福武7
1. 中国科学院华南植物园;2. 中国科学院研究生院;3. 北京师范大学香港浸会大学联合国际学院;4.广州中医药大学中药学院;5.深圳大学生命科学学院;6.1.中国科学院华南植物园;7.中国科学院华南植物园
摘要:  利用基于ITS序列的分子系统学对国产堇菜属(Viola L.)进行了系统发育重建,选择Hybanthus concolor和鳞隔堇(Scyphellandra pierrei)作为外类群,对国产堇菜属植物54种1亚种共66个序列进行分析。分子系统树中获得强烈支持的中国堇菜属属下组级分类群有Sect. Viola、Sect. Diffusae、Sect. Bilobatae、Sect. Vaginatae。Subgen. Melanium与Sect. Viola和Sect. Trigonocarpae聚在一起,说明它们的亲缘关系较近,但Sect. Trigonocarpae支获得的支持率较低。分子系统树证实了Subgen. Dischidium与Subgen. Chamaemelanium的近缘关系,但不支持根据距的长短将Subgen. Dischidium划分为Sect. Longicalcaratae和Sect. Brevicalcaratae的处理。而Pinnatae类群应该作为Sect. Adnatae下的一个亚组处理。根据分子系统发育和形态学特征对V. lucens、V. magnifica、V. dissecta、V. yunnanensis等的分类地位进行了重新评价。
关键词:  堇菜属  分子系统学  nrITS序列
DOI:10.3969/j.issn.1005-3395.2010.06.007
分类号:
基金项目:国家自然科学基金项目(30870153;30470137)
Molecular Systematics of Genus Viola L. in China
GONG Qin1,2,3, ZHOU Jin-song4, ZHANG Yong-xia5, LIANG Guan-xin1,2, CHEN Hong-feng6, XING Fu-wu7
1. South China Botanical Garden, Chinese Academy of Sciences;2. Graduate University of Chinese Academy of Sciences;3. BNU-HKBU United International College;4.School of Chinese Materia Medica, Guangzhou University of Traditional Chinese Medicine;5.College of Life Science, Shenzhen University;6.South China Botanical Garden, Chinese Academy of Sciences;7.South China Botanical Garden, Chinese Academy of Science
Abstract:  The internal transcribed sequence of the nuclear ribosomal DNA (nrDNA-ITS) was chosen as the target sequence to resolve the phylogeny of the genus Viola in China. 66 sequences (39 of which were reported for the first time) of 55 ingroup taxa were collected, with Hybanthus concolor and Scyphellandra pierrei as outgroups. Molecular phylogenetic trees strongly supported the monophyly of Sect. Viola, Sect. Diffusae, Sect. Bilobatae and Sect. Vaginatae. The close sister relationship among Subgen. Melanium, Sect. Viola and Sect. Trigonocarpae was revealed, however, the clade of Sect. Trigonocarpae got low support. Subgen. Dischidium was confirmed to have a very close relationship with Subgen. Chamaemelanium by maximum parsimony tree, but the two Sections (Sect. Longicalcaratae and Sect. Brevicalcaratae) under Subgen. Dischidium should be combined together. Phylogenetic trees also showed that Pinnatae should be treated as a subsection under Sect. Adnatae. Besides, the systematic status of V. lucens, V. magnifica, V. dissecta and V. yunnanensis were discussed combining molecular results with morphologic characters.
Key words:  Viola  Molecular systematics  nrITS

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