Molecular characterisation of Turnip mosaic virus isolates from Brassicaceae weeds

  • Shirin Farzadfar
  • Yasuhiro Tomitaka
  • Mutsumi Ikematsu
  • Ali Reza Golnaraghi
  • Reza Pourrahim
  • Kazusato Ohshima
Article

Abstract

Eight provinces of Iran were surveyed during 2003–2008 to find Brassicaceae reservoir weed hosts of Turnip mosaic virus (TuMV). A total of 532 weed samples were collected from plants with virus-like symptoms. The samples were tested for the presence of TuMV by enzyme-linked immunosorbent assay using specific antibodies. Among those tested, 340 samples (64%) were found to be infected with TuMV. Rapistrum rugosum, Sisymberium loeselii, S. irio and Hirschfeldia incana were identified as the Brassicaceae weed hosts of TuMV, and the former two plant species were found to be the most important weed hosts for the virus in Iran. The full-length sequences of the genomic RNAs of IRN TRa6 and IRN SS5 isolates from R. rugosum and S. loeselii were determined. No evidence of recombination was found in both isolates using different recombination-detecting programmes. Phylogenetic analyses of the weed isolates with representative isolates from the world showed that the IRN TRa6 and IRN SS5 isolates fell into an ancestral basal-Brassica group. This study shows for the first time the wide distribution and phylogenetic relationships of TuMV from weeds in the mid-Eurasia of Iran.

Keywords

Turnip mosaic virus Brassicaceae Weeds Iran Evolution Phylogeny 

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Copyright information

© KNPV 2008

Authors and Affiliations

  • Shirin Farzadfar
    • 1
  • Yasuhiro Tomitaka
    • 2
  • Mutsumi Ikematsu
    • 2
  • Ali Reza Golnaraghi
    • 3
  • Reza Pourrahim
    • 1
  • Kazusato Ohshima
    • 2
  1. 1.Department of Plant VirologyPlant Pests and Diseases Research InstituteTehranIran
  2. 2.Laboratory of Plant Virology, Faculty of AgricultureSaga UniversitySagaJapan
  3. 3.Department of Plant Protection, College of Agriculture and Natural Resources, Science and Research BranchIslamic Azad UniversityTehranIran

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