Phylogenetic incongruence in Cymbidium orchids

Guo-Qiang Zhang; Gui-Zhen Chen; Li-Jun Chen; Jun-Wen Zhai; Jie Huang; Xin-Yi Wu; Ming-He Li; Dong-Hui Peng; Wen-Hui Rao; Zhong-Jian Liu; Si-Ren Lan

Plant Diversity (Dec 2021)

Phylogenetic incongruence in Cymbidium orchids

Guo-Qiang Zhang,
Gui-Zhen Chen,
Li-Jun Chen,
Jun-Wen Zhai,
Jie Huang,
Xin-Yi Wu,
Ming-He Li,
Dong-Hui Peng,
Wen-Hui Rao,
Zhong-Jian Liu,
Si-Ren Lan

Affiliations

Guo-Qiang Zhang: Forestry College of Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and the Orchid Conservation and Research Center of Shenzhen, Shenzhen, 518114, China
Gui-Zhen Chen: Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and the Orchid Conservation and Research Center of Shenzhen, Shenzhen, 518114, China
Li-Jun Chen: Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and the Orchid Conservation and Research Center of Shenzhen, Shenzhen, 518114, China
Jun-Wen Zhai: Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
Jie Huang: Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and the Orchid Conservation and Research Center of Shenzhen, Shenzhen, 518114, China
Xin-Yi Wu: Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and the Orchid Conservation and Research Center of Shenzhen, Shenzhen, 518114, China
Ming-He Li: Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
Dong-Hui Peng: Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
Wen-Hui Rao: Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and the Orchid Conservation and Research Center of Shenzhen, Shenzhen, 518114, China
Zhong-Jian Liu: Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Corresponding author.
Si-Ren Lan: Forestry College of Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Corresponding author. Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China

Journal volume & issue: Vol. 43, no. 6
pp. 452 – 461

Abstract

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Cymbidium, which includes approximately 80 species, is one of the most ornamental and cultivated orchid genera. However, a lack of markers and sparse sampling have posed great challenges to resolving the phylogenetic relationships within the genus. In the present study, we reconstructed the phylogenetic relationships by utilizing one nuclear DNA (nrITS) and seven plastid genes (rbcL, trnS, trnG, matK, trnL, psbA, and atpI) from 70 species (varieties) in Cymbidium. We also examined the occurrence of phylogenetic conflict between nuclear (nrITS) and plastid loci and investigated how phylogenetic conflict bears on taxonomic classification within the genus. We found that phylogenetic conflict and low support values may be explained by hybridization and a lack of informative characteristics. Our results do not support previous classification of the subgenera and sections within Cymbidium. Discordance between gene trees and network analysis indicate that reticulate evolution occurred in the genus Cymbidium. Overall, our study indicates that Cymbidium has undergone a complex evolution.

Published in Plant Diversity

ISSN: 2468-2659 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Science: Biology (General); Science: Botany
Website: https://www.keaipublishing.com/en/journals/plant-diversity/

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