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Phylogenetic incongruence in Cymbidium orchids

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 phylogen...

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Autores principales: Zhang, Guo-Qiang, Chen, Gui-Zhen, Chen, Li-Jun, Zhai, Jun-Wen, Huang, Jie, Wu, Xin-Yi, Li, Ming-He, Peng, Dong-Hui, Rao, Wen-Hui, Liu, Zhong-Jian, Lan, Si-Ren
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Kunming Institute of Botany, Chinese Academy of Sciences 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8720702/
https://www.ncbi.nlm.nih.gov/pubmed/35024514
http://dx.doi.org/10.1016/j.pld.2021.08.002
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author Zhang, Guo-Qiang
Chen, Gui-Zhen
Chen, Li-Jun
Zhai, Jun-Wen
Huang, Jie
Wu, Xin-Yi
Li, Ming-He
Peng, Dong-Hui
Rao, Wen-Hui
Liu, Zhong-Jian
Lan, Si-Ren
author_facet Zhang, Guo-Qiang
Chen, Gui-Zhen
Chen, Li-Jun
Zhai, Jun-Wen
Huang, Jie
Wu, Xin-Yi
Li, Ming-He
Peng, Dong-Hui
Rao, Wen-Hui
Liu, Zhong-Jian
Lan, Si-Ren
author_sort Zhang, Guo-Qiang
collection PubMed
description 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.
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spelling pubmed-87207022022-01-11 Phylogenetic incongruence in Cymbidium orchids Zhang, Guo-Qiang Chen, Gui-Zhen Chen, Li-Jun Zhai, Jun-Wen Huang, Jie Wu, Xin-Yi Li, Ming-He Peng, Dong-Hui Rao, Wen-Hui Liu, Zhong-Jian Lan, Si-Ren Plant Divers Research Paper 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. Kunming Institute of Botany, Chinese Academy of Sciences 2021-09-09 /pmc/articles/PMC8720702/ /pubmed/35024514 http://dx.doi.org/10.1016/j.pld.2021.08.002 Text en © 2021 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Paper
Zhang, Guo-Qiang
Chen, Gui-Zhen
Chen, Li-Jun
Zhai, Jun-Wen
Huang, Jie
Wu, Xin-Yi
Li, Ming-He
Peng, Dong-Hui
Rao, Wen-Hui
Liu, Zhong-Jian
Lan, Si-Ren
Phylogenetic incongruence in Cymbidium orchids
title Phylogenetic incongruence in Cymbidium orchids
title_full Phylogenetic incongruence in Cymbidium orchids
title_fullStr Phylogenetic incongruence in Cymbidium orchids
title_full_unstemmed Phylogenetic incongruence in Cymbidium orchids
title_short Phylogenetic incongruence in Cymbidium orchids
title_sort phylogenetic incongruence in cymbidium orchids
topic Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8720702/
https://www.ncbi.nlm.nih.gov/pubmed/35024514
http://dx.doi.org/10.1016/j.pld.2021.08.002
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