Korean Journal of Breeding Science (한국육종학회지)

The Korean Society of Breeding Science (한국육종학회)
권호 표지

A New Rice Variety 'Hwaweon 4' with Durable Resistance to Rice Blast

벼 도열병 저항성 신품종 '화원4호'

  • Kim, Dong-Min (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Ju, Hong-Guang (Agricultural Department, Agricultural College of Yanbian University) ;
  • Kang, Ju-Won (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Han, Seong Sook (National Academy of Agricultural Science, RDA) ;
  • Ahn, Sang-Nag (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
  • 김동민 (충남대학교 농업생명과학대학) ;
  • 구홍광 ;
  • 강주원 (충남대학교 농업생명과학대학) ;
  • 한성숙 (농촌진흥청 농업과학연구원 농업생물부) ;
  • 안상낙 (충남대학교 농업생명과학대학)
  • Received : 2011.10.19
  • Accepted : 2011.11.18
  • Published : 2011.12.30
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Abstract

'Hwaweon 4' was developed from a cross between the African upland cultivar, 'Moroberekan' and 'Ilpumbyeo' based on marker-aided backcross selection. The recurrent parent 'Ilpumbyeo' is a high grain quality cultivar with medium to late maturity. 'Hwaweon 4' is nearly isogenic to 'Ilpumbyeo' except a small Moroberekan introgressed segment on chromosome 4 harboring the resistance gene for blast. The preliminary and replicated yield trial was conducted at Chungnam National University in 2006 and 2007. The local adaptability test was carried out by the National Seed Management Office (NSMO) from 2008 to 2009. This cultivar was registered to NSMO with a cultivar designated as 'Hwaweon 4'. This cultivar averaged 76 cm in culm length and has medium growth duration. Milled rice of 'Hwaweon 4' is translucent and the grain quality traits are comparable to those of the recurrent parent. It has low protein content. The yield potential of 'Hwaweon 4' in grain was about 6.31 MT/ha at the ordinary fertilizer level for two years. This variety showed highly resistance reaction at the blast nursery test at four locations and also at the sequential planting method. This resistance is due to the resistance gene designated as Pi45(t) on chromosome 4 introgressed from the donor parent, 'Moroberekan'. The Pi45(t) gene would be useful inenhancing resistance to blast in rice breeding program.

'화원4호'는 '일품벼'의 농업적 특성에 모로베레칸의 도열병 저항성 유전자가 이입된 근동질계통을 육성하기 위해 '일품벼'와 모로베레칸을 교배하고, 계속적인 여교배와 MAS를 병행 실시하여 유망한 계통 CR502-3-2 계통을 선발하였다. 생산력검정 시험 결과 조사된 형질 중 도열병저항성을 제외한 기타 형질에서는 '일품벼'와 유사한 근동질계통으로, 품종보 호원 출원 조건에 부합하여 '화원4호'로 명명하고 품종보호원을 출원하였다. 1. 출수기는 보통기재배에서 8월 18일로 '일품벼'와 동일한 중생종 품종이다. 2. 천립중은 23.3 g으로 '일품벼'와 유사한 수준이었다. 3. 흰잎마름병과 줄무늬잎마름병에는 이병성이다. 5. 완전미율은 '일품벼'에 비해 약간 낮았고, 아밀로스 함량은 '일품벼'보다 높았으나 통계적인 차이는 없었다. 6. '화원 4호'의 정조수량은 '05~'06년 2개년간 실시한 생산력검정 시험에서 평균 6.31 MT/ha로 '일품벼' 대비 99% 수준이었다.

Keywords

Acknowledgement

Supported by : 농촌진흥청

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