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Phylogenetic analysis and character evolution of tribe Arethuseae (Orchidaceae) reveal a new genus Mengzia

文献类型： 外文期刊

作者： Huang, Wei-Chang 1 ; Liu, Zhong-Jian 1 ; Jiang, Kai 2 ; Luo, Yi-Bo 3 ; Jin, Xiao-Hua 3 ; Zhang, Ze 2 ; Xu, Ru-Hua 2 ; Muchuku, John Kumau 4 ; Musungwa, Stanely S. 5 ; Yukawa, Tomohisa 6 ; Wang, Wei 2 ; Zeng, Xin-Hua 2 ; Zhang, Hui-Ming 7 ; Cai, You-Ming 9 ; Hu, Chao 2 ; Lan, Si-Ren 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Landscape Architecture, Key Lab Natl Forestry & Grassland Adm Orchid Cons, Fuzhou 350002, Peoples R China

2.Chinese Acad Sci, Shanghai Chenshan Plant Sci Res Ctr, Chenshan Bot Garden, Shanghai 201602, Peoples R China

3.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China

4.Jomo Kenyatta Univ Agr Sci & Technol, Nairobi 6200000200, Kenya

5.Ewanrigg Bot Gardens, Shamva Cy 560, Zimbabwe

6.Natl Museum Nat & Sci, Tsukuba Bot Garden, Tsukuba, Ibaraki 3050005, Japan

7.Chinese Acad Sci, Shanghai Ctr Plant Stress Biol, Shanghai 201602, Peoples R China

8.Chinese Acad Sci, CAS Ctr Excellence Mol Plant Sci, Shanghai 201602, Peoples R China

9.Shanghai Acad Agr Sci, Shanghai 201106, Peoples R China

关键词： Molecular phylogenetics; Morphology; Evolutionary transition; Bletilla foliosa; Subtribe Arethusinae; Subtribe Coelogyninae

期刊名称：MOLECULAR PHYLOGENETICS AND EVOLUTION （ 影响因子：5.019； 五年影响因子：4.78 ）

ISSN： 1055-7903

年卷期： 2022 年 167 卷

页码：

收录情况： SCI

摘要： Delimitation of the tribe Arethuseae has varied considerably since it was first defined. The relationships within Arethuseae, particularly within the subtribe Arethusinae, remain poorly elucidated. In this study, we reconstructed the phylogeny of Arethuseae, using six plastid markers (matK, ycf1, rbcL rpoc1, rpl32-trnL and trnL-F) from 83 taxa. The ancestral state reconstruction of 11 selected morphological characters was also conducted to identify synapomorphies and assess potential evolutionary transitions. Morphological character comparision between the distinct species Bletilla foliosa and other species are conducted. Our results unequivocally supported the monophyly of Arethuseae, which included highly supported clades and a clear synapomorphy of nontrichome-like lamellae. Furthermore, B. foliosa formed a separate clade in the subtribe Arethusinae, instead of clustering with the other Bletilla species in the subtribe Coelogyninae. The morphological characters comparision further showed that the B. foliosa clade could be distinguished from other genera in Arethuseae by multiple characters, including presence of lateral inflorescence, three lamellae with trichome-like apex and four pollinia. In light of these molecular and morphological evidences, we propose Mengzia as a new genus to accommodate B. foliosa and accordingly provide descriptions of this new genus and combination.

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