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Incidence of Viral Diseases and Occurrence of Three Unreported Viruses in Yams in Korea

  • Lee, Joong-Hwan (Institute for Bioresources Research, Gyeongsangbuk-do Agricultural Research & Extension Services) ;
  • Park, Chung Youl (School of Applied Biosciences, Kyungpook National University) ;
  • Cho, Ha-Jeong (School of Applied Biosciences, Kyungpook National University) ;
  • Oh, Jonghee (School of Applied Biosciences, Kyungpook National University) ;
  • Kim, Bong-Sub (Functional Crop Resource Development Division, Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration) ;
  • Park, Eun Hey (Incheon International Airport Regional Office, Animal and Plant Quarantine Agency) ;
  • Son, Chang-Gi (Institute for Bioresources Research, Gyeongsangbuk-do Agricultural Research & Extension Services) ;
  • Lee, Su-Heon (School of Applied Biosciences, Kyungpook National University)
  • Received : 2016.11.10
  • Accepted : 2017.01.06
  • Published : 2017.03.31

Abstract

During 2012 to 2014, a survey for the presence of viral diseases in yam plants was carried out in a field of the Institute for Bioresources Research in Gyeongsangbuk-do, Korea. A total of 88 leaf samples were collected and tested by reverse transcription polymerase chain reaction using specific primer sets. Eighty-one samples were positive for Broad bean wilt virus 2 (BBWV2), Chinese yam necrotic mosaic virus (ChYNMV), Cucumber mosaic virus (CMV), Japanese yam mosaic virus (JYMV), and Yam mild mosaic virus (YMMV), whereas Yam mosaic virus (YMV) was not detected. Additionally, seven samples were negative for all viruses. Several samples exhibited mixed (double and triple) infections. Three viruses (CMV, JYMV, and YMMV) were detected for the first time in yam plants in Korea. A BLAST search showed that three viruses shared nucleotide identities with CMV-Ca (98%), JYMV-O2 (91%), and YMMV-TG_NH_1 (86%). Thus, our findings confirmed that yam plants cultivated in Korea were infected with multiple viruses with three of these viruses reported for the first time in Korea.

Keywords

References

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