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2023 Vol.68, Issue 3 Preview Page
Influence of Artificial Rainfall on Wheat Grain Quality During Ripening by Using the Speed-breeding System

세대단축시스템을 이용한 국내 밀 품종의 등숙기 강우에 의한 품질변이 평가

Hyeonjin Park1
,
Jin-Kyung Cha1
,
So-Myeong Lee1
,
Youngho Kwon1
,
Jisu Choi1
,
Ki-Won Oh2
,
Jong-Hee Lee2*
박 현진1
,
차 진경1
,
이 소명1
,
권 영호1
,
최 지수1
,
오 기원2
,
이 종희2*
1Junior Scientist, National Institute of Crop Science, RDA, Miryang 50424, Korea
2Senior Scientist, National Institute of Crop Science, RDA, Miryang 50424, Korea
1농촌진흥청 국립식량과학원 논이용작물과 농업연구사
2농촌진흥청 국립식량과학원 논이용작물과 농업연구관
*Corresponding Author
1 September 2023. pp. 188-196
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Abstract

Wheat (Triticum aestivum L.) is an important crop in Korea, with a per capita consumption of 31.6 kg in 2019. In the southern region, wheat is grown after paddy rice, and it is harvested during the rainy season in mid-June. This timing, in combination with high humidity and untimely rainfall, activates the enzyme alpha-amylase, which breaks down starch in the wheat grains. As a result, sprouted grains have lower quality and value for flour. However, seeds that absorb water before sprouting are expected to maintain better quality. The aim of the study was to identify the critical period during wheat maturation when rainfall has the greatest impact on grain quality, to prevent price declines due to quality deterioration. Two wheat cultivars, Jokyoung and Hwanggeumal, were grown in a speed breeding room, and artificial rainfall was applied at different times after heading (30, 35, 40, 45, 50, and 55 days). The proportion of vitreous grains decreased from 40 to 55 days after heading (DAH). Both cultivars had chalky grain sections from 35 DAH, with Hwanggeumal having a higher proportion of vitreous grains. Starch degradation was observed using FE-SEM (Field Emission Scanning Electron Microscope) at 40 DAH for Jokyoung and 50 DAH for Hwanggeumal. Color measurements indicated increased L and E values from 40 DAH, with rain treatment at 55 DAH leading to a significant increase in L values for both cultivars. Ash content increased at 45 DAH, whereas SDSS decreased at 35 DAH. Overall, grain quality from 40 DAH until harvest was found to be affected to the greatest extent by direct exposure of the spikes to moisture. Red wheat showed better quality than white wheat. These findings have implications for the cultivation of high-quality wheat and can guide future research efforts in this area.

Keywords
artificial rain
pre-harvest sprouting
quality
speed breeding
wheat
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 68
  • No :3
  • Pages :188-196
  • Received Date : 2023-07-03
  • Revised Date : 2023-07-26
  • Accepted Date : 2023-07-26
  • DOI :https://doi.org/10.7740/kjcs.2023.68.3.188
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