Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Occurrence of Leaf Mold Pathogen Fulvia fulva Isolates Infecting Tomato Cf-9 Cultivars in Korea

토마토 Cf-9 저항성 품종에 잎곰팡이병을 일으키는 Fulvia fulva 균주의 국내 발생

  • Lee, Ji Hyun (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Park, Myung Soo (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Kim, Jin-Cheol (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Jang, Kyoung Soo (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Choi, Yong Ho (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Kim, Heung Tae (Department of Plant Medicine, Chungbuk National University) ;
  • Choi, Gyung Ja (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology)
  • 이지현 (한국화학연구원 바이오화학연구센터) ;
  • 박명수 (한국화학연구원 바이오화학연구센터) ;
  • 김진철 (한국화학연구원 바이오화학연구센터) ;
  • 장경수 (한국화학연구원 바이오화학연구센터) ;
  • 최용호 (한국화학연구원 바이오화학연구센터) ;
  • 김흥태 (충북대학교 식물의학과) ;
  • 최경자 (한국화학연구원 바이오화학연구센터)
  • Received : 2013.01.23
  • Accepted : 2013.06.16
  • Published : 2013.12.31
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Abstract

Leaf mold symptoms were found on commercial tomato cultivars carrying the Cf-9, a resistance gene to leaf mold pathogen Fulvia fulva in 2012 at Buyeo, Chungnam in Korea. Fifteen-fungal isolates were obtained from four Cf-9 cultivars of tomato including 'Cutie', 'otaerangdia', 'Unicorn' and 'Rapito'. Due to their same morphological appearances and colony color, nine isolates were selected and identified as F. fulva based on molecular analysis of the internal transcribed spacer rDNA sequence. Pathogenicity of the 15 isolates on five commercial cultivars carrying Cf-4, Cf-5, and Cf-9 were tested. All the isolates showed strong pathogenicity on Cf-9 cultivars, 'Cutie' and 'Dotaerangdia', and Cf-5 cultivar, 'Yoyocaptain'. In contrast, on Cf-4 cultivar, 'Superdotaerang', five isolates were virulent and the other isolates were not. In addition, two fungal isolates, infecting Cf-9 cultivar and non-infecting Cf-4 cultivar, were selected and their pathogenicity was tested on 17 commercial cultivars reported as tomato having Cf-9 resistance gene. Among them, 15 cultivars were susceptible and 2 cultivars were resistant. It is likely that the two cultivars include other resistance gene. To our knowledge, this is the first report on the occurrence of Cf-9 infecting F. fulfva strains in Korea.

2012년 충남 부여에서 Fulvia fulva 저항성 유전자 Cf-9를 가지고 있는 토마토 품종('큐티', '도태랑다이아', '유니콘', '라피토')에서 잎곰팡이병이 크게 발생하였다. 이들 4개 Cf-9 토마토 품종으로부터 총 15개 균주를 분리하였다. 이들은 모두 형태적 특성이 같았으므로 이들 중 9개 균주를 선발하여 ITS rDNA 염기서열을 분석하여 동정한 결과, 모든 균주는 F. fulva임을 알 수 있었다. Cf-4, Cf-5 그리고 Cf-9 저항성 품종에 대한 분리한 15개 균주의 병원성을 검정하였다. 모든 균주들은 Cf-9 품종인 '큐티'와 '슈퍼도태랑' 그리고 Cf-5 품종 '요요캡틴'에서 강한 병원성을 나타냈다. 반면에 Cf-4 품종인 '슈퍼도태랑'에서는 5개의 균주만이 병원성을 나타내었고, 나머지 균주들에 대해서 이 품종은 저항성을 보였다. 그리고 Cf-9 품종에는 감수성을 그리고 Cf-4 품종엔 저항성을 나타내는 두 균주를 선발하여 Cf-9 품종으로 보고된 시판 중인 토마토 17개 품종에 대한 이들의 병원성을 조사하였다. 이들 중 15개 품종은 감수성을, 그리고 2개 품종은 저항성을 보였다. 이는 저항성 두 품종이 다른 저항성 유전자를 가지고 있기 때문으로 생각되었다. 본 논문은 우리나라에서 Cf-9 토마토 품종에 잎곰팡이병을 일으키는 F. fulva 균주의 발생을 처음으로 보고하는 것이다.

Keywords

References

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