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Isolation and Biological Characterization of Barley mild mosaic virus(BaMMV) Mild and Severe Strains in Korea

  • Jonson, Gilda (Honam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Park, Jong-Chul (Honam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Noh, Tae-Hwan (Honam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Kim, Mi-Jung (Honam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Hyun, Jong-Nae (Honam Agricultural Research Institute, National Institute of Crop Science, RDA) ;
  • Kim, Jung-Gon (Honam Agricultural Research Institute, National Institute of Crop Science, RDA)
  • Published : 2006.12.01

Abstract

Two distinct and stable isolates of Barley mild mosaic virus(BaMMV) designated as Naju82-S(severe) and Naju82-M(mild) were obtained. These two isolates differed in their symptomatology, virus transmission characteristics and cultivar specificity at various temperature. Thus, these isolates were referred to as strains in this study. BaMMV Naju-S strain showed severe mosaic symptoms accompanied by necrosis on the infected leaves. Naju82-S strain is more virulent demonstrated by shorter incubation period and relatively high virus concentration than Naju82-M strain. Five Korean cultivars were tested for their pathogenicity to different strains based on the rate of infection. Results showed that infection rate of cultivars to both strains did not significantly differed from each other. However, under different temperatures, the pathogenicity on the two cultivars such as cultivars Hopumbori and Sessalbori were significantly affected. Hopumbori was moderately resistant to both strains at $10-12^{\circ}C$ and susceptible at $15-18^{\circ}C$. Similarly, Sessalbori was moderately resistant at $10-12^{\circ}C$ to both strains but distinctly differentiated at $15-18^{\circ}C$ wherein it was resistant to mild strain and highly susceptible to severe strain. Other cultivars including Baegdong, Jinyangbori and Neahanssalbori consistently showed susceptible reaction to both strains at varying temperatures tested in this study.

Keywords

References

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