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A classification of Pepper yellow mosaic virus isolates into pathotypes

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Abstract

Pepper yellow mosaic virus (PepYMV) is the most important potyvirus infecting sweet pepper in Brazil. In this study, twenty isolates of PepYMV were obtained from commercial sweet pepper crops. To confirm virus identity, the coat protein gene was completely sequenced for eleven of these isolates, and partially sequenced for the other nine isolates. The amino acid identities obtained were above 93% when compared with the sequence of a characterized PepYMV isolate (AF348610). Extracts of Nicotiana tabacum cv. TNN plants infected with the different isolates were used to inoculate the differential series of Capsicum spp cultivars containing the genes pvr2 1, pvr2 2 , pvr2 3 , pvr2 4, and Pvr4. Using the same criteria established for Potato virus Y (PVY), fourteen isolates of PepYMV could be classified as known pathotypes described for PVY, that is: 1.2 (2 isolates), 1.3 (6) and 1.2.3 (6). The remaining six isolates, 1.3 (2) and 1.2.3 (4) could not be classified into the typical pathotypes of PVY because they were also virulent on Serrano Criollo de Morellos—334 (C.M 334) which carries the pvr2 3 and Pvr4 genes. To classify the PepYMV into pathotypes and counter the biological diversity found in this species we propose the utilization of 2x for the ability to overcome the correspondent allele of the pvr2 locus and 4 for the capacity to break down the Pvr4 gene. Using this criterion we could classify the PepYMV into five pathotypes: 21.22; 21.23; 21.22.23; 21.23. 4 and 21.22.23. 4.

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Acknowledgements

We thank FAPESP for the Financial Support and CAPES for the granted to the first author.

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Authors and Affiliations

  1. Departamento de Produção Vegetal, Setor Defesa Fitossanitária, UNESP, C.P. 237, 18603-970, Botucatu, SP, Brazil

    Monika Fecury Moura, Tatiana Mituti, Julio M. Marubayashi, Marcelo A. Pavan, Norberto da Silva & Renate Krause-Sakate

  2. Sakata Seed Sudamérica, Bragança Paulista, SP, Brazil

    Ricardo Gioria & Romulo F. Kobori

Authors
  1. Monika Fecury Moura
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  2. Tatiana Mituti
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  3. Julio M. Marubayashi
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  4. Ricardo Gioria
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  5. Romulo F. Kobori
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  6. Marcelo A. Pavan
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  7. Norberto da Silva
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  8. Renate Krause-Sakate
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Correspondence to Renate Krause-Sakate.

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Moura, M.F., Mituti, T., Marubayashi, J.M. et al. A classification of Pepper yellow mosaic virus isolates into pathotypes. Eur J Plant Pathol 131, 549–552 (2011). https://doi.org/10.1007/s10658-011-9836-9

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