Phylogenetic placement of the enigmatic orchid genera Thaia and Tangtsinia: Evidence from molecular and morphological characters

	Phylogenetic placement of the enigmatic orchid genera Thaia and Tangtsinia: Evidence from molecular and morphological characters
	Xiang, Xiao-Guo 1,2; Li, De-Zhu3 ; Jin, Wei-Tao 1,2; Zhou, Hai-Lang 1,2; Li, Jian-Wu 4; Jin, Xiao-Hua 1,2
	2012-02-01
发表期刊	TAXON
卷号	61 期号:1 页码:45-54
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.
关键词	Molecular Phylogeny Morphology Neottieae Orchidaceae Tangtsinia Thaia
收录类别	SCI
语种	英语
WOS记录号	WOS:000305357100003
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/15652
专题	中国西南野生生物种质资源库
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
推荐引用方式 GB/T 7714	Xiang, Xiao-Guo,Li, De-Zhu,Jin, Wei-Tao,et al. Phylogenetic placement of the enigmatic orchid genera Thaia and Tangtsinia: Evidence from molecular and morphological characters[J]. TAXON,2012,61(1):45-54.
APA	Xiang, Xiao-Guo,Li, De-Zhu,Jin, Wei-Tao,Zhou, Hai-Lang,Li, Jian-Wu,&Jin, Xiao-Hua.(2012).Phylogenetic placement of the enigmatic orchid genera Thaia and Tangtsinia: Evidence from molecular and morphological characters.TAXON,61(1),45-54.
MLA	Xiang, Xiao-Guo,et al."Phylogenetic placement of the enigmatic orchid genera Thaia and Tangtsinia: Evidence from molecular and morphological characters".TAXON 61.1(2012):45-54.

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