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Epitypification of Puccinia psidii, Causal Agent of Guava Rust

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Abstract

Puccinia psidii is an important pathogen considered a threat to plants of the Myrtaceae around the world. Morphological variability has created misunderstanding around the classification of this pathogen. Due to the obligately biotrophic nature of P. psidii, the age of the material on which the original description was based, and the poor condition of its DNA, there has been no clear genetic characterization of the species. An epitype is therefore designated for P. psidii for precise application of this taxon name. A morphological description and DNA characterization are provided from the epitype, obtained from the same location and host of the lectotype, also designated herein. Morphologically, the epitype is identical to the original material and phylogenetic and microsatellite analyses show that the epitype is representative of P. psidii from guava in Brazil.

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Acknowledgments

The authors would like to acknowledge the Nucleus of Microscopy and Microanalysis at the Universidade Federal de Viçosa, (www.nmm.ufv.br) for providing the equipment and technical support for experiments involving electron microscopy, and the University of Tasmania Central Science Laboratory, particularly Adam Smolenski for assistance with genotyping and Dr Karsten Goemann for further assistance with scanning electron microscopy. We thank Dr. Roger Shivas (Department of Agriculture, Forestry and Fisheries, Queensland, Australia) for reviewing the paper and for valuable suggestions as well as Epagri and Dr. Klaus Scheuermann for supporting the sampling. The project was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil (CNPq), Fundação de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG), the Australian Department of Agriculture, and Clonar Resistência a Doenças Florestais.

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Correspondence to Acelino C. Alfenas.

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da S. Machado, P., Glen, M., Pereira, O.L. et al. Epitypification of Puccinia psidii, Causal Agent of Guava Rust. Trop. plant pathol. 40, 5–12 (2015). https://doi.org/10.1007/s40858-014-0002-8

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  • DOI: https://doi.org/10.1007/s40858-014-0002-8

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