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Issue: Vol. 598 No. 1: 19 May 2023
Type: Article
Published: 2023-05-19
DOI: 10.11646/phytotaxa.598.1.8
Page range: 97-104
Abstract views: 77
PDF downloaded: 7

Phylogenetics of two rhizomatous epiphytic species of Cymbidium (Orchidaceae; Cymbidieae): evidence from analyses of nuclear and plastid DNA

Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou 350002, China ; Fujian Colleges and Universities Engineering Research Institute of Conservation and Utilization of Natural Bioresources, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Fujian Colleges and Universities Engineering Research Institute of Conservation and Utilization of Natural Bioresources, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Asian orchids Cymbidiinae Epidendroideae lear-plastid incongruence orchid phylogenetics Monocots

Abstract

The phylogenetic positions of two little-known species of Cymbidium (Cymbidiinae) with creeping rhizomatous habit, C. lii and C. repens, has previously been unclear. Here, we present a comprehensive molecular phylogenetic study of the genus based on nuclear ribosomal ITS and seven plastid regions. All analyses showed that C. lii and C. repens are sister to C. dayanum, an epiphytic species, with high support. However, many topological conflicts in inter- and intra-sectional relationships were observed in other parts of the trees, supporting existence of hybridization in Cymbidium but not affecting the taxa of interest in this study.

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