KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Evaluation of Resistance to Rice Sheath Blight (Rhizoctonia solani Kühn) of Rice Germplasms at Seedling Stage

유묘접종에 의한 벼 유전자원의 벼잎집무늬마름병 저항성 평가

  • 김정주 (농촌진흥청 국립식량과학원 벼맥류부 벼육종재배과) ;
  • 백만기 (농촌진흥청 국립식량과학원 벼맥류부 벼육종재배과) ;
  • 원용재 (농촌진흥청 국립식량과학원 답작과) ;
  • 조영찬 (농촌진흥청 국립식량과학원 벼맥류부 벼육종재배과) ;
  • 김보경 (농촌진흥청 국립식량과학원 답작과)
  • Received : 2013.07.18
  • Accepted : 2013.09.05
  • Published : 2013.12.30
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Abstract

Rice sheath blight (ShB), caused by Rhizoctonia solani K$\ddot{u}$hn, is one of the serious fungal disease resulting in severe yield loss in rice field worldwide. There are limited sources of genetic resistance and no commercial cultivar with high level of ShB resistance is currently available in Korea. In order to seek available resources with high level of resistance to ShB, 40 rice germplasms were used to evaluate disease reactions including ShB, leaf blast and bacterial leaf blight and these germplasms also examined agronomic traits such as days to heading, culm length, panicle length, No. of panicles, No. of spikelets per panicle and so on. There is wide variation in agronomic characters and disease reactions. Rice germplasms also showed considerably different ShB reaction caused by inoculation at seedling stage. Areumbyeo, Gayabyeo, IR579-Es44 and IR64 showed more strong reaction to ShB than the others. Especially, Gayabyeo is considerably available to develop a new variety with resistance to ShB in Korea.

벼 벼잎집무늬마름병에 대한 저항성 품종 육성에 이용할 유전자원을 탐색하기 위하여 주요 농업적 특성 및 벼잎집무늬마름병 저항성 검정 결과를 요약하면 다음과 같다. 1. 40개 벼 유전자원의 주요 농업적 특성은 파종 후 출수까지 일수는 62일에서 112일까지 분포하였고 간장은 최소 59 cm에서 129 cm 범위에 분포하였으며, 이삭길이는 가장 짧은 품종은 PL3212가 17 cm, 가장 긴 품종은 Moroberekan가 29 cm이었다. 수량 구성요소 중 수수는 최소 5개에서 최대 15개 범위에 분포하였고, 수당립수는 최저 77개에서 최고 240개 범위에 분포하였다. 현미천립중은 평균 22.1 g으로 최저 13.6 g인 소립종에서 최고 29.3 g의 대립종까지 분포하였다. 2. 인디카형 조생종 1품종, 중생종 8품종, 중만생종 10품종 및 만생종 2품종에 대해 벼잎집무늬마름병에 의한 평균 병반형성비율은 각각 27.2, 45.3, 58.1 및 36.0%이었다. 자포니카형 조생종 5품종, 중생종 1품종, 중만생종 1품종 및 만생종 1품종의 벼잎집무늬마름병에 의한 평균병반형성비율은 각각 48.8, 34.2, 56.9 및 69.0% 이었고, 통일형 품종은 중생종과 중만생종 각각 2품종의 평균 병반형성비율이 32.0 및 28.9% 이었다. 3. 인디카형 중만생 품종 IR579-Es44와 IR64, 통일형 중생종 가야벼와 중만생종 아름벼 등 4품종은 벼잎집무늬마름병균 KACC No. 40101에 의한 병반형성비율이 22.9~27.2%로 중도저항성 반응을 보였다. 4. 벼잎집무늬마름병에 대해 중도 저항성을 나타낸 IR579-Es44, IR64, 가야벼 및 아름벼는 흰잎마름병에 대해 저항성이고 아름벼를 제외한 나머지 품종은 도열병에도 저항성을 보였으며 특히 간장이 작아 도복의 위험이 적고 기타 농업적 특성이 우수한 IR579-Es44, 가야벼, IR64는 각각 조생종, 중생종, 중만생 등 숙기별로 벼잎집무늬마름병 저항성 품종을 육성하는데 활용할 가치가 높을 것으로 생각된다.

Keywords

References

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