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2018 Vol.36, Issue 4 Preview Page

Research Article

Resistance of Pepper Cultivars to Ralstonia solanacearum Isolates from Major Cultivated Areas of Chili Peppers in Korea

국내 고추 주산지에서 분리한 Ralstonia solanacearum 균주에 대한 고추 품종들의 저항성

Jin Hoon Lee1,2
,
Jundae Lee2
,
Dae-Geun Oh1*
이 진훈1,2
,
이 준대2
,
오 대근1*
1Department of Food Crops, Korea National College of Agriculture and Fisheries
2Department of Horticulture, Chonbuk National University
1한국농수산대학 식량작물학과
2전북대학교 원예학과
*교신저자. *Corresponding Author. 
31 August 2018. pp. 569-576
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Abstract

Bacterial wilt, caused by Ralstonia solanacearum, is a serious disease in chili pepper (Capsicum annuum L.) and is gradually increasing due to climate change in Korea. In this study, we collected 14 R. solanacearum isolates from 12 major cultivated areas of chili pepper and analyzed their biovar and pathogenicity. The biovar test categorized the 14 isolates into two groups, biovar 3 and biovar 4. Their pathogenicity was further analyzed using 12 commercial pepper cultivars including two controls, ‘Geonchowang’ (susceptible) and ‘Konesian Hot’ (resistant). The isolates were divided into six groups based on their pathogenicity and the pepper cultivars were divided into four groups according to their resistance to the 14 isolates. Isolates of group I had the strongest pathogenicity and isolates of group VI had the weakest pathogenicity to the 12 pepper cultivars. Pepper groups B, C, and D were moderately resistant or resistant to some isolates, but the resistance in these cultivars was not as strong as the resistant control ‘Konesian Hot’. These results suggest that R. solanacearum isolates from Korea can be classified by their pathogenicity using five different pepper cultivars. This study provides useful information on the biovar distribution of R. solanacearum in Korea and on the selection of genetic resources available for bacterial wilt resistance breeding.

Keywords
bacterial wilt
Capsicum annuum
disease resistance breeding
hot pepper
germplasm

고추(Capsicum annuum L.)의 주요 병해 중 하나인 풋마름병은 지구 온난화로 인해 여름철 기온이 점차 상승하고 있는 우리 나라에서 피해가 증가하는 추세이다. 이 연구에서는 국내 고추 주산지 12곳에서 풋마름병이 발생한 식물체를 채집하여 총 14 개의 병원균을 분리하였으며, 각 균주의 생리형을 분류하고 병원성 비교 실험을 수행하였다. 생리형 검정 결과 14개의 균주는 생리형 3과 4의 두 개 그룹으로 나뉘었다. 또한 분리 균주들의 병원성 비교 실험에서는 14개의 균주를 10개의 고추 시판품종과 저항성 대조품종(‘코네시안핫’)과 감수성 대조품종(‘건초왕’)을 포함하여 총 12개의 품종에 접종하였다. 그 결과 균주는 병원 성에 따라 6개의 그룹으로 나뉘었고, 고추는 14개 균주의 저항성에 따라 4개의 그룹으로 나뉘었다. 균주 그룹 I은 12개의 고추 품종에 대해 병원성이 가장 강한 균주임을 확인한 반면 균주 그룹 IV는 병원성이 가장 약한 균주임을 확인하였다. 또한, 고추 그 룹 B, C와 D는 몇몇 균주에 중도 저항성(M) 및 저항성(R)을 나타냈지만 저항성 정도가 저항성 대조품종인 ‘코네시안핫’만큼 강 하지 않은 것을 확인할 수 있었다. 이와 같은 결과는 5개의 고추 판별품종을 사용하여 R. solanacearum 균주의 병원성을 비교할 수 있을 것이라 생각된다. 결과적으로 이 연구는 풋마름병 저항성 품종 육성 시 어떤 생리형이 국내에 존재하는지에 대한 정보를 제시하고, 저항성 육종에 이용할 수 있는 유전자원의 선발 방법에 대한 정보를 제공한 점에서 유용할 것으로 사료된다.

키워드
Capsicum annuum
고추
내병성 육종
유전자원
풋마름병
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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :한국원예학회
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 36
  • No :4
  • Pages :569-576
  • Received Date : 2017-06-28
  • Revised Date : 2017-10-20
  • Accepted Date : 2017-10-17
  • DOI :https://doi.org/10.12972/kjhst.20180057
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