The Plant Pathology Journal

The Korean Society of Plant Pathology (한국식물병리학회)
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Tomato spotted wilt virus Isolates Giving Different Infection in Commercial Capsicum annuum Cultivars

  • Chung, Bong-Nam (National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Choi, Hak-Soon (National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Yang, Eun-Young (National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Cho, Jeom-Deog (National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Cho, In-Sook (National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Choi, Gug-Sun (National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Choi, Seung-Kook (National Institute of Horticultural and Herbal Science, Rural Development Administration)
  • Received : 2011.10.06
  • Accepted : 2011.12.03
  • Published : 2012.03.01
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Abstract

$Tomato$ $spotted$ $wilt$ $virus$ (TSWV)-infected $Capsicum$ $annuum$ plants were collected from open fields during June to July in 2010. The TSWV isolates were designated as Gneung, Ghang-Kjj, Gchang-Njc, Ghae, and Pap. The nucleotide sequence of the nucleocapsid protein (N) and movement protein (NSm) of the five isolates was determined. The pathogenicity of the five isolates was determined on 14 $C.$ $annuum$ cultivars two times by using mechanical inoculation. The five isolates induced different response: Both Gneung and Gchang-Kjj did not infect any of the cultivars in the 2nd trial, while Gchang-Njc, Ghae and Pap infected 11, 6 and 13 of 14 cultivars, respectively. The five isolates also were tested on $Solanum$ $lycopersicum$ breeding line TGC09-71 and three $Nicotiana$ species. $S.$ $lycopersicum$ showed a similar response to the five isolates as did $C.$ $annuum$. Both Gchang-Njc and Ghae infected systemically all three $Nicotiana$ species tested. While both Pap and Gneung did not infect any of the $Nicotiana$ species tested. In conclusion, five TSWV isolates induced different infection spectra in $C.$ $annuum$ cultivars, $Nicotiana$ species and an $S.$ $lycopersicum$ breeding line. Amino acid sequence analysis of the NSm gene could not support or explain the different infection spectra of the five isolates. This study indicated that various isolates must be used as virus inocula for evaluation of $C.$ $annuum$ and $S.$ $lycopersicum$ cultivars in breeding programs for TSWV resistance.

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References

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