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- Publisher Website: 10.1016/j.ympev.2019.106689
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Article: Molecular phylogenetics and floral evolution of the Cirrhopetalum alliance (Bulbophyllum, Orchidaceae): Evolutionary transitions and phylogenetic signal variation
Title | Molecular phylogenetics and floral evolution of the Cirrhopetalum alliance (Bulbophyllum, Orchidaceae): Evolutionary transitions and phylogenetic signal variation |
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Authors | |
Keywords | Bulbophyllum Cirrhopetalum alliance Evolutionary transition Monophyly Phylogenetic signal |
Issue Date | 2020 |
Publisher | Academic Press. The Journal's web site is located at http://www.elsevier.com/locate/ympev |
Citation | Molecular Phylogenetics and Evolution, 2020, v. 143, p. article no. 106689 How to Cite? |
Abstract | The Cirrhopetalum alliance is a loosely circumscribed species-rich group within the mega-diverse genus Bulbophyllum (Orchidaceae). The monophyletic status of the alliance has been challenged by previous studies, although established sectional classifications have yet to be tested in a phylogenetic context. We used maximum likelihood and Bayesian analyses of DNA sequence data (cpDNA: matK and psbA-trnH; nrDNA: ITS and Xdh; 3509 aligned characters; 117 taxa), including all sections putatively associated with the Cirrhopetalum alliance, to reconstruct the phylogeny. We mapped 11 selected categorical floral characters onto the phylogeny to identify synapomorphies and assess potential evolutionary transitions across major clades. Our results unequivocally support the recognition of an amended Cirrhopetalum alliance as a well-supported monophyletic group characterized by clear synapomorphies, following the inclusion of sect. Desmosanthes and the exclusion of five putative Cirrhopetalum-allied sections. Most sections within the Cirrhopetalum alliance are demonstrated to be polyphyletic or paraphyletic, necessitating a new sectional classification. The inclusion of sect. Desmosanthes revolutionizes our understanding of the alliance, with significant evolutionary transitions in floral characters detected. We further investigated six continuously variable characters of the sepals and labellum, and detect phylogenetic conservatism in labellum width and the evolutionary lability of lateral sepal length, which can partly be explained by the different functional roles they play in pollination and pollinator trapping. © 2019 Elsevier Inc. |
Persistent Identifier | http://hdl.handle.net/10722/280133 |
ISSN | 2021 Impact Factor: 5.019 2020 SCImago Journal Rankings: 1.612 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Hu, A | - |
dc.contributor.author | Gale, SW | - |
dc.contributor.author | Liu, ZJ | - |
dc.contributor.author | Suddee, S | - |
dc.contributor.author | Hsu, TC | - |
dc.contributor.author | Fischer, GA | - |
dc.contributor.author | Saunders, RMK | - |
dc.date.accessioned | 2020-01-06T02:01:30Z | - |
dc.date.available | 2020-01-06T02:01:30Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Molecular Phylogenetics and Evolution, 2020, v. 143, p. article no. 106689 | - |
dc.identifier.issn | 1055-7903 | - |
dc.identifier.uri | http://hdl.handle.net/10722/280133 | - |
dc.description.abstract | The Cirrhopetalum alliance is a loosely circumscribed species-rich group within the mega-diverse genus Bulbophyllum (Orchidaceae). The monophyletic status of the alliance has been challenged by previous studies, although established sectional classifications have yet to be tested in a phylogenetic context. We used maximum likelihood and Bayesian analyses of DNA sequence data (cpDNA: matK and psbA-trnH; nrDNA: ITS and Xdh; 3509 aligned characters; 117 taxa), including all sections putatively associated with the Cirrhopetalum alliance, to reconstruct the phylogeny. We mapped 11 selected categorical floral characters onto the phylogeny to identify synapomorphies and assess potential evolutionary transitions across major clades. Our results unequivocally support the recognition of an amended Cirrhopetalum alliance as a well-supported monophyletic group characterized by clear synapomorphies, following the inclusion of sect. Desmosanthes and the exclusion of five putative Cirrhopetalum-allied sections. Most sections within the Cirrhopetalum alliance are demonstrated to be polyphyletic or paraphyletic, necessitating a new sectional classification. The inclusion of sect. Desmosanthes revolutionizes our understanding of the alliance, with significant evolutionary transitions in floral characters detected. We further investigated six continuously variable characters of the sepals and labellum, and detect phylogenetic conservatism in labellum width and the evolutionary lability of lateral sepal length, which can partly be explained by the different functional roles they play in pollination and pollinator trapping. © 2019 Elsevier Inc. | - |
dc.language | eng | - |
dc.publisher | Academic Press. The Journal's web site is located at http://www.elsevier.com/locate/ympev | - |
dc.relation.ispartof | Molecular Phylogenetics and Evolution | - |
dc.subject | Bulbophyllum | - |
dc.subject | Cirrhopetalum alliance | - |
dc.subject | Evolutionary transition | - |
dc.subject | Monophyly | - |
dc.subject | Phylogenetic signal | - |
dc.title | Molecular phylogenetics and floral evolution of the Cirrhopetalum alliance (Bulbophyllum, Orchidaceae): Evolutionary transitions and phylogenetic signal variation | - |
dc.type | Article | - |
dc.identifier.email | Saunders, RMK: saunders@hku.hk | - |
dc.identifier.authority | Saunders, RMK=rp00774 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.ympev.2019.106689 | - |
dc.identifier.scopus | eid_2-s2.0-85075316717 | - |
dc.identifier.hkuros | 308907 | - |
dc.identifier.volume | 143 | - |
dc.identifier.spage | article no. 106689 | - |
dc.identifier.epage | article no. 106689 | - |
dc.identifier.isi | WOS:000506225200019 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 1055-7903 | - |