Korean Journal of Breeding Science (한국육종학회지)

The Korean Society of Breeding Science (한국육종학회)
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Blast Resistant Early Maturing Rice 'Jungmo1024' with High Temperature Tolerance during Grain Filling Stage

고온조건에서 등숙이 양호하고 도열병에 강한 조생 고품질 벼 '중모1024' 육성

  • 정지웅 (농촌진흥청 국립식량과학원) ;
  • 강경호 (농촌진흥청 국립식량과학원) ;
  • 최임수 (농촌진흥청 국립식량과학원) ;
  • 장재기 (농촌진흥청 국립식량과학원) ;
  • 김명기 (농촌진흥청 국립식량과학원) ;
  • 이점호 (농촌진흥청 국립식량과학원) ;
  • 박향미 (농촌진흥청 국립식량과학원) ;
  • 양창인 (농촌진흥청 국립식량과학원) ;
  • 전용희 (농촌진흥청 국립식량과학원) ;
  • 서정필 (농촌진흥청) ;
  • 최인배 (농촌진흥청 국립식량과학원) ;
  • 정종민 (농촌진흥청 국립식량과학원) ;
  • 성낙식 (농촌진흥청 국립식량과학원) ;
  • 이정희 (농촌진흥청 국립식량과학원) ;
  • 윤미라 (농촌진흥청 국립식량과학원) ;
  • 김정곤 (전라북도농촌진흥원)
  • Received : 2015.11.20
  • Accepted : 2015.12.02
  • Published : 2016.03.31
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Abstract

'Jungmo1024' is a blast resistant early maturing rice cultivar with high temperature tolerance during grain filling stage. 'Jungmo1024' was derived from a sodium azide treatment on 'Suweon472', a high yielding japonica elite line which was latterly registered as 'Namil'. Comparison with the agronomical traits of 'Namil', 'Jungmo1024' was uniquely characterized as the induced gained function due to the reduced culm length, increased tiller number, strong blast resistance and especially high temperature tolerance during grain filling stage. The high temperature tolerance of 'Jungmo1024' was supported by two years experiments by comparing the head rice ratio produced in ordinary paddy field and green house condition. The heading date of 'Jungmo1024' was July 29 in central plain area, which was 9 days earlier than that of 'Hwaseong'. The milled rice yield performance of 'Jungmo1024' was about 4.98 MT/ha in local adaptability test for three years. 'Jungmo1024' had 69 cm in culm length, which was 15 cm shorter than that of 'Hwaseong', 20 cm in panicle length, 16 in tiller number, and 22.3g in 1,000 grain-weight of brown rice. 'Jungmo1024' exhibited strong rice blast resistance, but do not have any clear resistance gene sources against bacterial blight, viral diseases and insect fests. 'Jungmo1024', nevertheless, would be a useful rice cultivar could be used as a donor line for the breeding programs for developing southern plane adaptable early maturing rice cultivars with enhanced rice blast resistance, lodging tolerance, and especially high temperature tolerance during grain filling stage.

'중모1024'는 농촌진흥청 국립식량과학원이 돌연변이 육종법을 이용하여 육성한 도열병에 강한 조생 고품질 품종으로 쌀 외관이 양호한 품종이다. '중모1024'는 '남일'에 아지드화나트륨을 처리하여 확보한 돌연변이 후대계통으로 원품종에 비해 단간, 다얼, 강한 도열병 저항성, 특히 고온등숙 내성 등으로 차별화 된다. 일반포장과 온실을 이용한 고온등숙 내성평가에서 '중모1024'는 기존의 조생 품종들에 비해 현미완전미율이 유의하게 높아 돌연변이에 의해 고온등숙 내성인자가 유발되었음을 확인할 수 있었다. 지역적응시험을 3개년(2010~2012)간 수행한 결과, '중모1024'는 중부 평야지에서 보통기 보비재배 시 출수기는 7월 29일로 '화성'보다 9일 빠른 조생종이었다. 쌀수량은 보통기 표준재배에서 4.98 MT/ha로 '화성' 대비 98% 수준이었으며, '오대'보다 1% 증수되었다. '중모1024'의 간장은 '화성'보다 15 cm 작은 69 cm였다. '중모1024'의 이삭길이는 20 cm, 포기당 이삭수는 16개로 '화성'과 유사하거나 약간 많고 현미 천립중은 22.3 g이었다. '중모1024'는 현미 장폭비가 1.91인 단원형이었으며 백미는 심복백 발현이 거의 없어 맑고 투명하였다. '중모1024'의 알카리 붕괴도(6.2), 단백질 함량(6.2%) 및 아밀로스 함량(18.5%)은 '화성'보다 조금 낮았다. '중모1024'의 재배시험과정 중 위조현상은 관찰되지 않았으며 성숙기 하위엽 노화는 늦은 편이었다. '중모1024'는 '화성'에 비해 수발아에 약간 민감하였고 내랭성 평가 중 적고는 나타나지 않았으나 임실율은 다소 낮았다. '중모1024'는 도열병에 강한 저항성을 발현하였으나, 벼흰잎마름병, 줄무늬잎마름병 및 멸구류에는 감수성이었다. 그러나 '중모1024'는 쓰러짐과 도열병에 강하고 쌀 수량성이 안정적일 뿐 아니라, 특히 고온등숙 조건에서 등숙된 쌀의 외관이 맑고 깨끗하기 때문에 향후 미질이 우수하고 도열병저항성이 강화된 평야지 적응 벼 조생품종을 개발하기 위한 중간모본으로 활용될 수 있을 것으로 판단된다(품종보호권 등록번호: 제5103호; 2014. 7. 31).

Keywords

Acknowledgement

Supported by : 농촌진흥청

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