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One for all: molecular study of Polygala major complex (Polygalaceae) in Southwest Asia

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Abstract

Ten species of Polygala closely related to P. major are recorded in Southwest Asia. Most of them were described as local endemics of the Transcaucasia. However, species of the P. major complex are often difficult to identify, having rather subtle and changeable morphological features that could not be treated as essential. The phylogenetic analysis of sequences of the nrITS/ETS and chloroplast trnL–trnF regions (intron and spacer) showed their extreme similarity. Based on the molecular evidence and main diagnostic morphological features, the ten species of the P. major complex are synonymized under P. major. Typifications of eight combinations in Polygala from Western Asia and Europe are also clarified.

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Acknowledgements

We thank curators and staff of the herbaria for providing material for our study; Laurence Loze and Laurent Gautier for their help with obtaining images of the original material for Polygala anatolica; and Alexey Seregin and Galina Degtjareva for helpful comments. The study was supported by the International Association for Plant Taxonomy Research Grants Program in Plant Systematics. JFBP gratefully acknowledges funding for a research fellowship (302452/2017-6) from the CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico). The authors are grateful to Pyotr Petrov and Alex Popovkin for editing the English version of the manuscript.

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Correspondence to Dmitry Lyskov.

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Online Resource 1. Genetic distances within the Polygala major complex.

Online Resource 2. Bayesian phylogenetic tree based on the trnL–trnF sequence analysis, with posterior probability values and bootstrap values of maximum parsimony shown.

Online Resource 3. Lectotype of Polygala major (W0058270). Photograph courtesy of the Naturhistorisches Museum Wien.

Online Resource 4. Lectotype of Polygala anatolica (G00418870). Photograph courtesy of the Conservatoire et Jardin botaniques dela Ville de Genève.

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Lyskov, D., Pastore, J.F.B. & Samigullin, T. One for all: molecular study of Polygala major complex (Polygalaceae) in Southwest Asia. Plant Syst Evol 305, 975–984 (2019). https://doi.org/10.1007/s00606-019-01618-x

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