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Characterization of Sources of Resistance to Bacterial Spot in Capsicum Peppers

고추 세균성점무늬병 저항성 유전자원과 그 주요 특성

  • Byeon, Si-Eun (Department of Horticulture, Kyungpook National University) ;
  • Abebe, Alebel Mekuriaw (Department of Horticulture, Kyungpook National University) ;
  • Jegal, Yoon-Hyuk (Department of Horticulture, Kyungpook National University) ;
  • Wai, Khin Pa Pa (Department of Horticulture, Kyungpook National University) ;
  • Siddique, Muhammad Irfan (Department of Horticulture, Kyungpook National University) ;
  • Mo, Hwang-Sung (Department of Horticulture, Kyungpook National University) ;
  • Yoo, Hee Ju (Department of Horticulture, Kyungpook National University) ;
  • Jang, Kil-Su (Yeongyang Pepper Experiment Station, Gyeongsangbuk-do Agricultural Research & Extension Services) ;
  • Hwang, Ji-Eun (Yeongyang Pepper Experiment Station, Gyeongsangbuk-do Agricultural Research & Extension Services) ;
  • Jeon, Su-Gyeong (Yeongyang Pepper Experiment Station, Gyeongsangbuk-do Agricultural Research & Extension Services) ;
  • Lee, Su-Heon (School of Applied Biosciences, Kyungpook National University) ;
  • Kim, Byung-Soo (Department of Horticulture, Kyungpook National University)
  • Received : 2016.01.14
  • Accepted : 2016.08.25
  • Published : 2016.10.31

Abstract

A total of 33 accessions of pepper (Capsicum spp.), including previously reported and newly discovered sources of resistance to bacterial spot caused by Xanthomonas euvesicatoria, were evaluated for their resistance to bacterial spot. The selected accessions were then grown and their horticultural characteristics were recorded. In a test for hypersensitive resistance (HR) to four races (P1, P3, P7, P8) of the pathogen found in Korea, KC00939 and Chilbok No.2, which carry the Bs2 gene, exhibited a hypersensitive response to all four races, as expected. Chilbok No.3, which carries the Bs3 gene, showed a hypersensitive reaction to race 1 and 7, as expected. KC00939 exhibited a high ASTA color value and tolerance to multiple infections from a viral complex of Cucumber mosaic virus (CMV) and Broad bean wilt virus (BBWV). Thus, this accession represents a promising genetic resource for breeding cultivars with multiple disease resistance and strong red coloration. KC01327, KC01617, KC01015, KC01760, KC01779, KC01137, KC01328, KC01006, KC00127, KC01704, and KC00995 did not exhibit hypersensitivity but showed a high level of general resistance when evaluated by spray inoculation. KC01617, KC01760, KC01779, KC01137, KC01704, and KC01777 are newly identified sources of resistance to bacterial spot. The previously and newly identified sources of resistance to bacterial spot evaluated in this study, including information about their resistance to CMV and BBWV complex in the field, the contents of pungent and sweet taste components, and the color values of dry fruits, will be useful for breeding pepper cultivars with resistance to bacterial spot.

국내외에서 보고된 저항성 유전자원과 새로 찾은 자원을 포함한 고추 유전자원 총 33점에 세균성점무늬병원균(X. euvesicatoria)을 접종하여 과민반응형 저항성과 일반 저항성을 검정하고, 선발한 자원에 대하여 원예적 특성을 조사하였다. 국내에 보고된 4종의 race(1, 3, 7, 8)에 대한 과민반응형 저항성을 판별한 결과, Bs2 유전자를 보유한 KC00939와 Chilbok No.2는 예상대로 4종의 race에 과민형 반응을 나타내었다. Bs3 유전자를 보유한 Chilbok No.3는 예상대로 race 1과 7에 과민형 반응을 보였다. KC00939는 CMV와 BBWV의 복합 감염에 강한 저항성을 보이고 색소함량이 매우 높아 고색도 복합저항성 육종 소재로서의 그 가치가 높았다. 이와 더불어 KC01327, KC01617, KC01015, KC01760, KC01779, KC01137, KC01328, KC01006, KC00127(PI369994), KC01704, KC00995, KC00131(PI369998) 및 KC01777이 높은 수준의 일반 저항성을 나타내었다. 이들 중 KC01617, KC01760, KC01779, KC01137, KC01704, KC01777은 이번 연구에서 세균성점무늬병 저항성으로 찾은 자원이다. 이들 세균성점무늬병 저항성 유전자원의 CMV와 BBWV의 복합 감염에 대한 저항성, 과실특성, 과실의 신미, 감미 및 색소함량(ASTA)을 분석한 결과는 세균성점무늬병 저항성 육종에 유용하게 활용될 것으로 기대된다

Keywords

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