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.2024 Apr;242(2):700-716.
doi: 10.1111/nph.19580. Epub 2024 Feb 21.

The origin and speciation of orchids

Oscar A Pérez-Escobar  1Diego Bogarín  2  3Natalia A S Przelomska  1  4James D Ackerman  5Juan A Balbuena  6Sidonie Bellot  1Roland P Bühlmann  7Betsaida Cabrera  8Jose Aguilar Cano  9Martha Charitonidou  10Guillaume Chomicki  11Mark A Clements  12Phillip Cribb  1Melania Fernández  2Nicola S Flanagan  13Barbara Gravendeel  3Eric Hágsater  14John M Halley  10Ai-Qun Hu  15Carlos Jaramillo  16Anna Victoria Mauad  17Olivier Maurin  1Robert Müntz  18Ilia J Leitch  1Lan Li  19Raquel Negrão  1Lizbeth Oses  2Charlotte Phillips  1  4Milton Rincon  9Gerardo A Salazar  20Lalita Simpson  21Eric Smidt  17Rodolfo Solano-Gomez  22Edicson Parra-Sánchez  23Raymond L Tremblay  5Cassio van den Berg  24Boris Stefan Villanueva Tamayo  9Alejandro Zuluaga  25Alexandre R Zuntini  1Mark W Chase  1  26Michael F Fay  1Fabien L Condamine  27Felix Forest  1Katharina Nargar  19  21  28Susanne S Renner  29William J Baker  1Alexandre Antonelli  1  30  31  32  33
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Free article

The origin and speciation of orchids

Oscar A Pérez-Escobar et al. New Phytol.2024 Apr.
Free article

Abstract

Orchids constitute one of the most spectacular radiations of flowering plants. However, their origin, spread across the globe, and hotspots of speciation remain uncertain due to the lack of an up-to-date phylogeographic analysis. We present a new Orchidaceae phylogeny based on combined high-throughput and Sanger sequencing data, covering all five subfamilies, 17/22 tribes, 40/49 subtribes, 285/736 genera, and c. 7% (1921) of the 29 524 accepted species, and use it to infer geographic range evolution, diversity, and speciation patterns by adding curated geographical distributions from the World Checklist of Vascular Plants. The orchids' most recent common ancestor is inferred to have lived in Late Cretaceous Laurasia. The modern range of Apostasioideae, which comprises two genera with 16 species from India to northern Australia, is interpreted as relictual, similar to that of numerous other groups that went extinct at higher latitudes following the global climate cooling during the Oligocene. Despite their ancient origin, modern orchid species diversity mainly originated over the last 5 Ma, with the highest speciation rates in Panama and Costa Rica. These results alter our understanding of the geographic origin of orchids, previously proposed as Australian, and pinpoint Central America as a region of recent, explosive speciation.

Keywords: Laurasia; Neotropics; Orchidaceae; high‐latitude extinction; historical biogeography; macroevolution.

© 2024 The Authors New Phytologist © 2024 New Phytologist Foundation.

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References

    1. Ackerman J. 2019. Orchids and the persistent instability principle. In: Pridgeon AM, Arosemena AR, eds. Proceedings of the 22th World Orchid Conference, vol. 1. Guayaquil, Ecuador: Asociación Ecuatoriana de Orquideología.
    1. Ackerman J, Phillips RD, Tremblay RL, Karremans A, Reiter N, Peter CI, Bogarín D, Pérez‐Escobar OA, Liu H. 2023. Beyond the various contrivances by which orchids are pollinated: global patterns in orchid pollination biology. Botanical Journal of the Linnean Society 202: 295–324.
    1. Ali JR, Heaney LR. 2021. Wallace's line, Wallacea, and associated divides and areas: history of a tortuous tangle of ideas and labels. Biological Reviews 96: 922–942.
    1. Baker WJ, Bailey P, Barber V, Barker A, Bellot S, Bishop D, Botigué LR, Brewer G, Carruthers T, Clarkson JJ et al. 2022. A comprehensive phylogenetic platform for exploring the angiosperm tree of life. Systematic Biology 71: 301–319.
    1. Baker WJ, Couvreur TLP. 2012. Global biogeography and diversification of palms sheds light on the evolution of tropical lineages. II. Diversification history and origin of regional assemblages. Journal of Biogeography 40: 286–298.

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