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Contribution to ITS phylogeny of the Brassicaceae, with special reference to some Asian taxa

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Abstract

Sequence data from the nuclear ribosomal internal transcribed spacer (ITS) region for 189 accessions representing 184 species in 121 genera of Brassicaceae were used to determine monophyly of tribes and genera, tribal boundaries, and component genera. Parsimony analysis and Bayesian inference suggest that the tribes Camelineae and Arabideae are polyphyletic and should be subdivided into smaller tribes. The study also supports the recent recognition of the new tribes Aphragmeae, Biscutelleae, Buniadeae, Calepineae, Conringieae, Dontostemoneae, Erysimeae, Malcolmieae, Megacarpaeeae, and Turritideae. The data argue for the placement of Borodinia in the tribe Boechereae, Litwinowia and Pseudoclausia in the Chorisporeae, Atelanthera and Streptoloma in the Euclidieae, and Megacarpaea and Pugionium in the Megacarpaeeae, and exclusion of Asperuginoides, Didymophysa, and Ptilotrichum from the Alysseae, Macropodium, Pseudoturritis, and Stevenia from the Arabideae, and Crucihimalaya, Irenepharsus, Pachycladon, and Turritis from the Camelineae. Finally, the findings support the expansion of Stevenia to include both Berteroella and Ptilotrichum, Sterigmostemum to include Oreoloma and one species of Anchonium, Crucihimalaya to include Transberingia and several species of Arabis, and Parrya to include Pseudoclausia. The data also suggest that Calymmatium and Olimarabidopsis may be congeneric.

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Acknowledgments

The authors are grateful to Ulrike Coja for extensive help in the laboratory and to Andreas Franzke for fruitful discussion. We appreciate the comments of two anonymous reviewers and Marcus Koch which helped us to improve the paper. The first author thanks the Deutscher Akademischer Austauschdienst (DAAD, Germany) and the Russian Federal Agency for Science and Innovations for supporting his visits and laboratory research at Osnabrück University. Financial support for B. Neuffer, H. Hurka, and N. Friesen by the Deutsche Forschungsgemeinschaft (DFG) and the Ministry of Science and Culture (MWK) of Lower Saxony, Germany, for field work and herbaria visits in Mongolia, Kyrgyzstan, and Russia, is gratefully acknowledged. We gratefully thank all the herbaria mentioned for supplying plant material.

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  1. Dmitry A. German

    Present address: Department of Functional Genomics and Proteomics, Institute of Experimental Biology, Masaryk University, Kamenice 5, Building A2/214, 62500, Brno, Czech Republic

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  1. South-Siberian Botanical Garden, Altai State University, Lenin str. 61, 656049, Barnaul, Russia

    Dmitry A. German

  2. Botanical Garden, University of Osnabrück, Albrechtstrasse 29, 49076, Osnabrück, Germany

    Nikolai Friesen & Herbert Hurka

  3. Department of Biology, Botany, University of Osnabrück, Barbarastrasse 11, 49076, Osnabrück, Germany

    Barbara Neuffer

  4. Missouri Botanical Garden, 2345 Tower Grove, St. Louis, MO, 63110, USA

    Ihsan A. Al-Shehbaz

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Correspondence to Dmitry A. German.

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German, D.A., Friesen, N., Neuffer, B. et al. Contribution to ITS phylogeny of the Brassicaceae, with special reference to some Asian taxa. Plant Syst Evol 283, 33–56 (2009). https://doi.org/10.1007/s00606-009-0213-5

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