• 한국농촌생활과학회지
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• 제9권2호
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• pp.33-41
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• 1998

This study is to find out the effects of the qualify of the breads made from Korean and imported wheat flour respectively after adding chitosan, by examining the dough making, the bread making properties, the Physicochemical properties of the breads. The low polymerized chitosan (M. W. : 37,000) was added respectively 1, 3 and 5% in the form of 10% lactic acid aqueous solution. The Korean wheat bread had 4% more water, 3% more sugar, 0.5% more salt, 3% more margarine and 1.5% more yeast per 100% to wheat flour added than the imported wheat bread. The bread volume for the two groups stayed the same. The water absorption in the chitosan added group was increased more greatly than in the control group, however, pH was reduced. In case of color among all wheat bread groups the ‘L’ value appeared to be higher in the imported wheat bread groups, and the ‘b’ value appeared to be higher in the chitosan added group.

• 농업생명과학연구
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• 제46권1호
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• pp.153-161
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• 2012

Wheat is a very popular crop in all over the world due to the various use of wheat flour as staple foods, such as bread. As many food products are made from wheat, the property of wheat can be a determinant of the quality of final food products. Staled bread is not harmful to health but is normally rejected by consumers due to the absence of desirable sensory attributes. The phenomena of staling can be increased hardness of bread, the migration of moisture from center of bread to the crust of bread, loss of flavor and etc. The exact mechanism of staling has not been established completely. To delay or prevent staling, either addition of anti-staling agent, such as surfactant and enzyme or modification of wheat component, such as wheat starch has been adapted. The development of waxy wheat made it possible to reconstitute the starch component in bread. When the content of amylopect in was increased in bread, the loss of moisture was decreased and the reduction in softness of bread was decreased during storage. Increased retrogradation of starch did not always accompany the staling of bread indicating that the retrogradation of starch may not be a single indicator of bread staling. To find out the exact relationship between bread staling and starch retrogradation, further research is necessary.

• Journal of Applied Biological Chemistry
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• 제62권3호
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• pp.293-297
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• 2019

Leaf rust is the most widespread and destructive fungal disease, and outbreaks have always caused considerable losses in wheat yields. Thus, worldwide increases in wheat production depend on the development of leaf rust-resistant wheat varieties. In this study, we evaluated the resistance of forty Korean wheat cultivars to leaf rust at the seedling stage. Only two Korean wheats, Ol and Jonong, were resistant to leaf rust, whereas the remaining thirty-eight Korean wheats were susceptible to leaf rust. The Ol and Jonong varieties presented larger dry seed weights and higher antioxidant activity in response to leaf rust than the susceptible wheat varieties. No differences in ${\beta}$-1,3-glucanase activity or chlorophyll content between resistant and susceptible wheat varieties were observed. Overall, these results are important for the development of wheat varieties that are highly resistant to leaf rust and to understand the underlying mechanisms that confer leaf rust resistance.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.275-275
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• 2022

One of the most widely grown food crops in the world, wheat, is increasing more lodged since for increased rains and winds caused by abnormal climate. During the Green Revolution, shorter wheat cultivars were bred using many Rht genes to increase lodging resistance. However, since only some Rht genes were used for breeding shorter wheat, it may have had a limited impact on wheat breeding and reduced genetic diversity. Therefore, it is essential to search for genes that have breeding potential and affect dwarfism in order to increase the genetic diversity of dwarf characteristics in wheat. In this study, we performed the RNA-seq between 'Keumkang' and 'Komac 5' ('Keumkang' mutant) to analyze the difference in plant height. Differentially expressed genes (DEGs) analysis and Gene function annotation were performed using 265,365,558 mapped reads. Cluster set analysis was performed to compress and select candidate gene DEGs affecting plant height, stem and internode. Gene expression analysis was performed in order to identify the functions of the selected genes by condensing the results of the DEG analysis into a cluster set analysis. This analysis of these plant height-related genes could help reduce plant height, improve lodging resistance, and increase wheat yield. Its application to wheat breeding will also affect the increased genetic diversity of wheat dwarfism.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.61-61
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• 2022

For high quality bread wheat production in Korea, it is necessary to develop optimal nitrogen (N) fertilizer methods. For optimal N fertilizer, we evaluated the alteration of growth, yield, yield components and end-use qualities according to the treatment of N fertilizer amounts and timings at heading stages. Growth, yield, yield components, and end-use quality weren't altered by various timings of N fertilizer treatment conditions whereas, 1,000 grain weight and lodging degree was increased by increasing amounts of N fertilizer treatment conditions at 7 days after heading (7 DAH). Especially, lodging degree was significantly increased by 6kg/10a of N fertilizer treatment conditions at 7 DAH. The flour protein contents increased by various amounts of N fertilizer treatment conditions. However, SDS-sedimentation and bread loaf volumes were decreased by exceeding 6kg/10a of N fertilizer treatment conditions at 7 DAH. When considering the quality of bread, 6kg/10a N fertilizer treatment is best, but 3kg/10a N fertilizer treatment is more suitable for both quality and lodging at 7 DAH. Therefore, it is preferable to fertilize 3kg/10a of nitrogen at 7 DAH in addition to standard fertilizer when cultivate bread wheat.

• 한국작물학회지
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• 제56권3호
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• pp.279-283
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• 2011

The immature embryos during seed development were examined to predict the suitable embryos for an efficient regeneration system. Five spring wheat genotypes and five winter wheat genotypes were tested using immature embryos as explants. Spring wheat genotypes showed much higher levels of plant regeneration than those of winter wheat genotypes. The highest frequencies of embryogenesis and regeneration were obtained when embryos at 13-14 days after anthesis (DAA) were used as explant and decreased using embryos at 21-22 DAA during seed development. Significant differences were also found for callus induction and regeneration as affected by immature embryo size. The regeneration efficiency was drastically decreased in spring and winter wheat genotypes when embryos larger than 2.0 mm of length were used. The optimum developmental stage and embryo length for regeneration efficiency were at 13-14 DAA and 1.0-1.5 mm, respectively. The selection of suitable embryos for the high frequencies of embryogenesis and regeneration leads us to efficient genetic improvement of wheat.

• 한국식품영양과학회지
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• 제46권1호
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• pp.146-151
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• 2017

2011년에서 2013년까지 국산 원맥 443점과 수입 원맥 160점의 품질 특성을 비교하였다. 수분 함량은 국산 원맥이 10.90~13.90%, 수입 원맥은 8.0~12.6%로 나타났다. 단백질 함량은 국산 원맥이 9.34~16.1%, 수입 원맥은 9.0~14.6% 범위에 있었다. 회분 함량은 국산 원맥이 1.28~1.89%, 수입 원맥은 1.19~1.74%였으며, 원맥의 단위 밀도는 국산 원맥이 512~859 g/L, 수입 원맥이 789~853 g/L로 수입 원맥의 범위가 더 좁게 나타났다. 국산 원맥의 falling number는 147~822 s로 통상적인 고품질 밀가루의 범위인 300~600 s를 벗어난 300 s 미만의 낮은 품질의 원맥이 존재함을 보여주었다. 반면에 수입 원맥의 falling number는 모두 300 s 이상이며 최대치는 516 s로 모든 원맥이 고품질 범위에 있었다. 피해립과 이물질 함량에서는 국산 원맥이 수입 원맥보다 평균적으로 높은 수치를 보여주었으나, 국산 원맥의 피해립과 이물질 함량은 2011년에서 2013년으로 갈수록 수치가 점차 줄어드는 경향성을 보여주어 지속적인 품질 개선이 이루어지고 있음을 보여주었다.

• Asian-Australasian Journal of Animal Sciences
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• 제23권3호
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• pp.333-339
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• 2010

The objectives of this study were to use the NRC-2001 model and DVE/OEB system to model potential nutrient supply to ruminants and to compare frost damaged (also called "frozen" wheat with normal wheat. Quantitative predictions were made in terms of: i) Truly absorbed rumen synthesized microbial protein in the small intestine; ii) Truly absorbed rumen undegraded feed protein in the small intestine; iii) Endogenous protein in the digestive tract; iv). Total truly absorbed protein in the small intestine; and v). Protein degraded balance. The overall yield losses of the frozen wheat were 24%. Results showed that using the DVE/OEB system to predict the potential nutrient supply, the frozen wheat had similar truly absorbed rumen synthesized microbial protein (65 vs. 66 g/kg DM; p>0.05), tended to have lower truly absorbed rumen undegraded feed protein (39 vs. 53 g/kg DM; p<0.10) and had higher endogenous protein (14 vs. 9 g/kg DM; p<0.05). Total truly absorbed protein in the small intestine was significantly lower (89 vs. 110 g/kg DM, p<0.05) in the frozen wheat. The protein degraded balance was similar and both were negative (-2 vs. -1 g/kg DM). Using the NRC-2001 model to predict the potential nutrient supply, the frozen wheat also had similar truly absorbed rumen synthesized microbial protein (average 56 g/kg DM; p>0.05), tended to have lower truly absorbed rumen undegraded feed protein (35 vs. 48, g/kg DM; p<0.10) and had similar endogenous protein (average 4 g/kg DM; p>0.05). Total truly absorbed protein in the small intestine was significantly lower (95 vs. 108 g/kg DM, p<0.05) in the frozen wheat. The protein degraded balance was not significantly different and both were negative (-16 vs. -19 g/kg DM). In conclusion, both models predict lower protein value and negative protein degraded balance in the frozen wheat. The frost damage to the wheat reduced nutrient content and availability and thus reduced nutrient supply to ruminants by around 12 to 19%.

• 한국식품영양과학회지
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• 제45권5호
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• pp.731-735
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• 2016

본 연구는 밀 식이섬유 첨가가 닭고기 너겟의 품질 특성에 미치는 영향을 조사하였다. 처리구별로 밀 식이섬유를 0%(control), 1%, 2%, 3%를 첨가하여 제조하였다. 수분 함량은 밀 식이섬유의 첨가량이 증가할수록 유의적으로 증가하였으나(P<0.05), 단백질은 감소하는 경향을 보였다. 지방함량은 밀 식이섬유의 첨가량이 증가할수록 유의적으로 낮아지는 경향을 보였으며(P<0.05), 회분 함량은 밀 식이섬유를 첨가하지 않은 닭고기 너겟이 유의적으로 낮은 값을 보였다. 닭고기 너겟의 pH는 6.48~6.50의 범위로 유의적 차이는 나타내지 않았다. 명도는 밀 식이섬유를 첨가하지 않은 대조구가 처리구보다 높은 값을 나타내었으며(P<0.05), 적색도와 황색도는 밀 식이섬유의 첨가량이 증가할수록 증가하는 경향을 보였다. 튀김 수율과 경도는 식이섬유 함량이 증가함에 따라 증가하였으며, 관능평가 항목에서 처리구들 간의 유의적 차이는 나타내지 않았다. 이러한 결과로 보아 닭고기 너겟에 밀 식이섬유 첨가 시 품질 특성을 증진하는 것으로 나타나 향후 다양한 튀김제품에 기능성 소재로 활용할 가능성이 있을 것으로 생각된다.

• 한국식품과학회지
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• 제6권2호
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• pp.61-64
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• 1974

6종(種)의 밀가루에 대(對)하여 조단백함량(粗蛋白含量)과 생지형성력(生地形成力)을 조사한 바 다음과 같은 결과(結果)를 얻었다. 1) 보통계(普通系)밀에 있어서도 산지(産地)와 품종(品種)에 따라 현저(顯著)한 차이(差異)가 있었다. 국산(國産)밀을 원료(原料)로 한 밀가루의 조단백함량(粗蛋白含量)은 $10.4{\sim}11.8%$이고 생지형성시험결과(生地形成試驗結果)에서의 valorimeter value는 $39{\sim}48$로서 두 항목(項目)의 조사성적(調査成績)이 상반(相反)되는 경향(傾向)을 보였으며 미주산(美洲産)밀을 원료(原料)로 한 밀가루의 조단백함량(粗蛋白含量)은 $12.1{\sim}12.8%$이고 valorimeter value는 $72{\sim}80$으로서 두 항목(項目)의 조사성적(調査成績)이 같은 경향(傾向)을 보였다. 2) 같은 미주산(美洲産)밀 중(中)에서도 보통계(普通系)밀을 원료(原料)로 한 밀가루에서는 조단백함량(粗蛋白含量)과 생지형성능력(生地形成能力)의 조사성적(調査成績)이 같은 경향(傾向)을 보였으나 이립계(二粒系)밀을 원료(原料)로 한 밀가루에서는 조단백함량(粗蛋白含量)이 12%인데 valorimeter value는 38로서 두 항목(項目)의 조사성적(調査成績)이 상반(相反)되는 경향(傾向)을 보였다.