Phylogenetic relationships amongst the African genera of subtribe Orchidinae s.l. (Orchidaceae; Orchideae): Implications for subtribal and generic delimitations

Autor: Dirk U. Bellstedt, Thierry Pailler, Benny Bytebier, Florent Martos, Grace Ngugi, Timothée Le Péchon
Přispěvatelé: University of KwaZulu-Natal (UKZN), National Museums of Kenya, Botanic Garden Meise, Fédération Wallonie-Bruxelles, Partenaires INRAE, Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Stellenbosch University, The authors would like to thank Ezemvelo KwaZulu-Natal Wildlife Scientific Services and the Mpumalanga Tourism and Parks Agency (Wildlife Protection Services Division) for granting us permits (HO/4009/13, MPB 1252 and MPB 1252/2) to collect plant material within their parks, the South African National Research Foundation (KFD20100804000014875 Grant 74467), Bibliotheque Du Vivant (France) and University of KwaZulu-Natal for their financial support. G. Ngugi was funded by the National Research Foundation, F. Martos and T. Le Pechon were funded by the Claude Leon Foundation as part of a postdoctoral fellowship.
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Molecular Phylogenetics and Evolution
Molecular Phylogenetics and Evolution, Elsevier, 2020, 153, pp.106946. ⟨10.1016/j.ympev.2020.106946⟩
ISSN: 1055-7903
1095-9513
DOI: 10.1016/j.ympev.2020.106946⟩
Popis: International audience; Phylogenetic relationships within the Orchideae sensu Pridgeon et al, remain one of the biggest unresolved issues in our understanding of the taxonomy of the orchids. Members of the Orchideae are numerous and widespread in Africa but remain poorly represented in phylogenetic research. In this study we included a broad sampling of African taxa for which we sequenced three plastid (rbcl, matK and trnL + trnL-F) and two nuclear regions (ITS and 18S). We used 368 sequences representing 278 species and 49 genera to infer relationships using the Bayesian Inference and Maximum Likelihood method. Our results show strong support for three clades, two of which almost entirely match the historical circumscription of Orchidinae and Habenariinae, and the third, Bartholininae, sister to the former two, includes the genera Holothrix and Bartholina. Stenoglottis should be assigned to Orchidinae and not to Habenariinae. Several genera such as Habenaria, Cynorkis and Benthamia are shown to be para- or polyphyletic: Bonatea, Centrostigma, Platycoryne and Roeperocharis are all embedded in Habenaria; Physoceras, Arnottia and part of Benthamia are embedded in Cynorkis. We propose a subdivision of Orchideae sensu lato into nine subtribes, but refrain from making generic re-arrangements until more extensive or more in-depth studies have been done.
Databáze: OpenAIRE
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