KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Correlation Analysis between Head Rice Ratio and Agronomic Traits in RILs for Developing A Promising Rice Culitivar Adaptable to The Early-Transplanting Cultivation

조기재배 적합 벼품종 육성을 위한 재조합집단에서 완전미율과 농업형질과의 상관분석

  • 이종희 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 조준현 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 김상열 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 이지윤 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 김춘송 (농촌진흥청 국립식량과학원) ;
  • 여운상 (농촌진흥청 국립식량과학원) ;
  • 송유천 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 손영보 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 오명규 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 강항원 (농촌진흥청 국립식량과학원) ;
  • 남민희 (농촌진흥청 국립식량과학원 기능성작물부)
  • Received : 2011.09.16
  • Accepted : 2012.03.07
  • Published : 2012.03.30
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Abstract

In this study, we conducted to identify predictive parameters affecting the head rice ratio for developing high quality rice cultivar adaptable to the early-transplanting cultivation. The recombinant inbred lines (RILs) population from a cross between the parents of Pungmi and Koshihikari was used for test materials. Variations were observed in most of the measurements, eg culm length (ranging from 51.0 cm to 97.0 cm), amylose content (14.0~20.1%), protein content (5.2~7.4%), pasting properties (peak viscosity, 227.2~309.8 RVU) and head rice ratio (67.7~96.7%). Significant correlations between head rice ratio versus culm length (0.443) and head rice ratio versus protein content (-0.458) were detected in RIL population. However, culm length was negatively related to lodging tolerance. In order to develop a commercially suitable cultivar, selection for short culm and high head rice ratio of rice grains with physiochemical properties such as protein content, amylase content and taste value should be considered. This results can be used to increase the efficiency of breeding program for developing a new early-maturing rice variety adaptable to early transplanting cultivation in Korea.

평야지 조기재배에 적합한 신품종 육성을 위해 풍미와 고시히까리가 교배된 재조합 집단내에서 주요 농업적 형질을 비교하여 완전미율에 미치는 주요 요인을 확인하고자 수행한 결과는 다음과 같다. 재조합 집단의 주요 농업적 형질의 변이는 분석한 결과 간장은 51.0~97.0 cm, 아밀로스 함량은 14.0~20.1%, 단백질 함량은 5.2~7.4% 및 쌀가루 호화 특성인 최고점도는 -227.2~309.8 RVU이며, 완전미율은 67.7~96.7% 등으로 분포하였다. 주요 형질과 상관분석을 수행한 결과 완전미율과 간장은 정의상관(0.443)을 보였으며, 단백질함량과는 부의상관(-0.458)을 나타내었다. 평야지 조기재배에 적합한 고품질 품종개발을 위해서는 포장에서는 간장, 단백질 함량 및 완전미율 등 주요 농업적 특성을 고려하여 선발할 필요가 있다.

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References

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