KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Effects of Temperature and Sunshine Hours During Grain Filling Stage on the Quality-Related Traits of High Quality Rice Varieties in Korea

우리나라 고품질 벼 품종의 쌀 품질 특성에 미치는 등숙기 단계별 기온과 일조시간의 영향

  • Yang, Woonho (National Institute of Crop Science, Rural Development Administration) ;
  • Choi, Kyung-Jin (National Institute of Crop Science, Rural Development Administration) ;
  • Shon, Jiyoung (National Institute of Crop Science, Rural Development Administration) ;
  • Kang, Shingu (National Institute of Crop Science, Rural Development Administration) ;
  • Shin, Seong-Hyu (National Institute of Crop Science, Rural Development Administration) ;
  • Shim, Kang-Bo (National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Junhwan (National Institute of Crop Science, Rural Development Administration) ;
  • Jung, Hanyong (National Institute of Crop Science, Rural Development Administration) ;
  • Jang, Jung Hee (Gyeonggi-do Agricultural Research & Extension Services) ;
  • Jeong, Jeong-Su (Gangwon-do Agricultural Research & Extension Services) ;
  • Lee, Chae Young (Chungcheongbuk-do Agricultural Research & Extension Services) ;
  • Yun, Yeo Tae (Chungcheongnam-do Agricultural Research & Extension Services) ;
  • Kwon, Suk Ju (Jeollabuk-do Agricultural Research & Extension Services) ;
  • An, Kyu Nam (Jeollanam-do Agricultural Research & Extension Services) ;
  • Shin, Jong-Hee (Gyeongsangbuk-do Agricultural Research & Extension Services) ;
  • Bae, Sung Mun (Gyeongsangnam-do Agricultural Research & Extension Services)
  • Received : 2015.08.06
  • Accepted : 2015.08.31
  • Published : 2015.09.30
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Abstract

Relationship between grain quality-related traits and daily mean temperature/sunshine hours during grain filling stage was analyzed using eleven high quality rice varieties at 24 experimental sites through eight provinces of Korea in 2013~2014. In the data set pooled across varieties, experimental sites and years, grain quality-related traits such as percentage of head rice (PHR), head rice yield (HRY), protein in milled rice (PRO) and Toyo Mido Meter glossiness value (TGV) were higher at the temperature lower than $22.6^{\circ}C$ for 40 days after flowering (DAF), which was optimum for percentage of grain filling in this study. Optimum sunshine hours for 40 DAF were $6.0{\sim}6.1\;hr\;d^{-1}$when considered PHR, HRY and TGV. PRO was associated with daily mean temperature and sunshine hours for 40 DAF in more varieties than the other traits. PRO was closely correlated with daily mean temperature during early filling stage and sunshine hours during early to mid filling stage, compared to other stages during grain filling. It is concluded that general trend in the variation of grain quality-related traits could be explained by the changes in daily mean temperature and sunshine hours during grain filling. In addition, climate conditions during early grain filling stage played important roles to enhance grain quality.

벼 등숙기간 및 등숙기 기간별 기온과 일조시간이 쌀 품질 특성에 미치는 영향을 알아보기 위하여 전국 8개도 24개 지역에서 고품질 벼 11품종을 이용하여 2013-2014년에 시험한 결과는 다음과 같다. 1. 품종, 지역 및 연차별 시험성적을 모두 합하였을 때, 출수기, 출수 후 40일간 평균기온 및 일조시간의 범위는 각각 7월 23일~9월 4일, $18.8{\sim}26.4^{\circ}C$, 3.9~8.0시간/일이었다. 2. 성적을 모두 합하였을 때, 특성별 범위는 등숙비율 74.2~97.9%, 현미 천립중 19.6~26.1 g, 완전미 비율 61.4~98.5%, 완전미 수량 276~701 kg/10a, 쌀 단백질 4.8~8.3%, Toyo Mido Meter 값 66.1~91.5였다. 3. 완전미 비율, 완전미 수량, 쌀 단백질 및 Toyo Mido Meter 값은 출수 후 40일간의 등숙 최적온도인 $22.6^{\circ}C$보다 낮은 온도에서 높아졌으며, 쌀 외관품위와 밥맛을 고려한 출수 후 40일간의 최적 일조시간은 6.0~6.1시간/일로 평가되었다. 4. 쌀 단백질은 출수 후 40일간의 평균기온 및 일조시간과 유의한 관계를 보인 품종이 전체 11품종 중 각각 8개와 9개로, 다른 특성에 비해 많았다. 5. 쌀 단백질은 등숙 초기의 평균기온 및 등숙 초 중기의 일조시간에, 완전미 비율은 등숙 초기의 평균기온 및 일조시간에 상대적으로 더 큰 영향을 받았다.

Keywords

References

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