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题名: Phylogenetic placement of the enigmatic orchid genera Thaia and Tangtsinia: Evidence from molecular and morphological characters
作者: Xiang, Xiao-Guo1, 2; null(李德铢)3; Jin, Wei-Tao1, 2; Zhou, Hai-Lang1, 2; Li, Jian-Wu4; Jin, Xiao-Hua1, 2
刊名: TAXON
关键词: molecular phylogeny ; morphology ; Neottieae ; Orchidaceae ; Tangtsinia ; Thaia
英文摘要: The phylogenetic position of two enigmatic Asian orchid genera, Thaia and Tangtsinia, were inferred from molecular data and morphological evidence. An analysis of combined plastid data (rbcL+matK+psaB) using Bayesian and parsimony methods revealed that Thaia is a sister group to the higher epidendroids, and tribe Neottieae is polyphyletic unless Thula is removed. Morphological evidence, such as plicate leaves and corms, the structure of the gynostemium and the micrornorphology of pollinia, also indicates that Thaia should be excluded from Neottieae. Thaieae, a new tribe, is therefore tentatively established. Using Bayesian and parsimony methods, analyses of combined plastid and nuclear datasets (rbcL, matK, psaB, trnL-F, ITS, Xdh) confirmed that the monotypic genus Tangtsinia was nested within and is synonymous with the genus Cephalanthera, in which an apical stigma has evolved independently at least twice. The tribe Neottieae (excluding Thaia) is strongly supported as monophyletic based on molecular analyses and divided into three clades as follows: Palmorchis diverged earliest; Cephalanthera (including the former Tangtsinia) is sister to the remaining of the genera; and Aphyllorchis is immediate sister to Limodorum, forming a third clade with Neottia Guett. (including Listera) and Epipactis.
出版日期: 2012-02-01
卷号: 61, 期号:1, 页码:45-54
语种: 英语
收录类别: SCI
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/15652
Appears in Collections:中国西南野生生物种质资源库_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Bot, Herbarium, Beijing 100093, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
3.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
4.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Menglun Township 666303, Yunnan Province, Peoples R China

Recommended Citation:
Xiao-Guo Xiang.Phylogenetic placement of the enigmatic orchid genera Thaia and Tangtsinia: Evidence from molecular and morphological characters.taxon,2012,61(1):45-54
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