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Phylogenetic placement of the enigmatic orchid genera Thaia and Tangtsinia: Evidence from molecular and morphological characters
Xiang, Xiao-Guo; Li, De-Zhu; Jin, Wei-Tao; Zhou, Hai-Lang; Li, Jian-Wu; Jin, Xiao-Hua
2012
Source PublicationTAXON
ISSN0040-0262
Volume61Issue:1Pages:45-54
AbstractThe 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 (rbcLmatKpsaB) 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.
Subject AreaPlant Sciences ; Evolutionary Biology
Language英语
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/10463
Collection其他
Recommended Citation
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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