A1 Refereed original research article in a scientific journal
Disentangling knots of rapid evolution: origin and diversification of the moss order Hypnales
Authors: Huttunen S, Bell N, Bobrova VK, Buchbender V, Buck WR, Cox CJ, Goffinet B, Hedenaes L, Ho BC, Ignatov MS, Krug M, Kuznetsova O, Milyutina IA, Newton A, Olsson S, Pokorny L, Shaw JA, Stech M, Troitsky A, Vanderpoorten A, Quandt D
Publisher: MANEY PUBLISHING
Publication year: 2012
Journal: Journal of Bryology
Journal name in source: JOURNAL OF BRYOLOGY
Journal acronym: J BRYOL
Number in series: 3
Volume: 34
Issue: 3
First page : 187
Last page: 211
Number of pages: 25
ISSN: 0373-6687
DOI: https://doi.org/10.1179/1743282012Y.0000000013
Abstract
The Hypnales are the largest order of mosses comprising approximately 4200 species. Phylogenetic reconstruction within the group has proven to be difficult due to rapid radiation at an early stage of evolution and, consequently, relationships among clades have remained poorly resolved. We compiled data from four sequence regions, namely, nuclear ITS1-5.8S-ITS2, plastid trnL-F and rps4, and mitochondrial nad5, for 122 hypnalean species and 34 species from closely related groups. Tree topologies from both Bayesian and parsimony analyses resolve the order as monophyletic. Although inferences were made from fast-evolving genes, and despite strong phylogenetic signal in the nuclear ITS1-5.8S-ITS2 data, monophyly, as well as backbone nodes within the Hypnales, remains rather poorly supported except under Bayesian inferences. Ancestral distribution based on Bayesian dispersal-vicariance analysis supports a Gondwanan origin of the Hypnales and subsequent geographical radiation in the area of the former Laurasian supercontinent. Reconstruction of historical biogeography is congruent with mainly tropical and Gondwanan distributions in the sister groups Hypnodendrales, Ptychomniales, and Hookeriales, and with the dating for the oldest pleurocarp and hypnalean fossils. We contrast groupings in the phylogenetic tree with recent classifications and other phylogenetic inferences based on molecular data, and summarise current knowledge on the evolutionary history of, and relationships among, the Hypnales.
The Hypnales are the largest order of mosses comprising approximately 4200 species. Phylogenetic reconstruction within the group has proven to be difficult due to rapid radiation at an early stage of evolution and, consequently, relationships among clades have remained poorly resolved. We compiled data from four sequence regions, namely, nuclear ITS1-5.8S-ITS2, plastid trnL-F and rps4, and mitochondrial nad5, for 122 hypnalean species and 34 species from closely related groups. Tree topologies from both Bayesian and parsimony analyses resolve the order as monophyletic. Although inferences were made from fast-evolving genes, and despite strong phylogenetic signal in the nuclear ITS1-5.8S-ITS2 data, monophyly, as well as backbone nodes within the Hypnales, remains rather poorly supported except under Bayesian inferences. Ancestral distribution based on Bayesian dispersal-vicariance analysis supports a Gondwanan origin of the Hypnales and subsequent geographical radiation in the area of the former Laurasian supercontinent. Reconstruction of historical biogeography is congruent with mainly tropical and Gondwanan distributions in the sister groups Hypnodendrales, Ptychomniales, and Hookeriales, and with the dating for the oldest pleurocarp and hypnalean fossils. We contrast groupings in the phylogenetic tree with recent classifications and other phylogenetic inferences based on molecular data, and summarise current knowledge on the evolutionary history of, and relationships among, the Hypnales.
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