• Food Science and Biotechnology
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• 제15권2호
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• pp.254-259
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• 2006

Milling qualities and indigestible carbohydrate fractions (ICF) depending on harvesting time of Goami2 (G2), mutant of Ilpum (IP) rice, was examined. Fifty days after heading (DAH) maximized head rice milling quality (57.69%) and ICF content ($5.09{\pm}0.36\;g/100\;g$). ICF contents and physical properties of G2 and IP at 50 DAH were compared. ICF of G2 was three times higher than that of IP ($1.61{\pm}0.09\;g/100\;g$). Parboiling treatment increased ICF of G2 to $7.18{\pm}0.16\;g/100\;g$. G2 showed lower water absorption index, which could lower pasting properties, but higher water solubility index, implying it contains more soluble components. Texture properties of G2 were different from those of IP, showing higher hardness, and lower adhesiveness and cohesiveness. Positive correlation was observed between ICF and hardness, but reverse correlation between ICF and cohesiveness.

• Journal of Plant Biotechnology
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• 제43권1호
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• pp.66-75
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• 2016

Agrobacterium-mediated gene transfer has recently been developed to improve rice transformation. In this study, 3 different transformation methods were tested including soaking, co-cultivation, and vacuum infiltration. Agrobacterium tumefaciens GV3101 harboring the binary vector pGreen:: LeGSNOR was used in this experiment. This study aimed to identify the most appropriate method for transferring LeGSNOR into rice. Vacuum infiltration of the embryonic calli for 5 min in Ilpum resulted in high transformation efficiency based on confirmation by PCR, RT-PCR, and qRT-PCR analyses. In conclusion, we described the development of an efficient transformation protocol for the stable integration of foreign genes into rice; furthermore, the study results confirmed that PCR is suitable for efficient detection of the integrated gene. The vacuum infiltration system is a potentially useful tool for future studies focusing on transferring important genes into rice seed calli, and may help reduce time and effort.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2011년도 학술발표회
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• pp.16-18
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• 2011

Evaluation of climate change on the rice productivity was conducted using crop growth simulation model, where Odae, Hwaseong, Ilpum were used as a representative cultivar of early, medium, and medium-late rice maturity type, respectively, and climate change scenario 'A1B' was applied to weather data for future climate change at 57sites. When cropping season was fixed, rice yield decreased by 4~35% as climate change which was caused by poor filled grain ratio with high temperature and low irradiation during grain-filling. When cropping season was changed, rice yield decreased by only 0~5% as climate change which was caused poor filled grain ratio with low irradiation during grain-filling period. However, this irradiation decline was less than when cropping season was fixed. Therefore, we need to develop rice cultivars resistant to low irradiation which can maintain high filled grain ratio under poor irradiation condition, and late maturity rice cultivars whose growing period is longer than the present medium-late maturity type.

• 한국작물학회지
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• 제68권2호
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• pp.35-46
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• 2023

The transplanting period limit considering the rice yield in the Dague region, the inland plains of Gyeongsangbuk-do, was estimated to be July 15^th for early and mid-maturing rice and July 5^th for mid-late maturing rice. However, as the transplanting time was delayed, the characteristics of rice starch changed significantly. In the case of early and mid-maturing rice varieties, the starch granule size increased as the transplanting time was delayed; the opposite tendency was observed for mid-late maturing varieties. In all mature rice types, the late transplanting resulted in a longer pasting time and a higher pasting temperature. In addition, the peak viscosity, breakdown, and gelatinization temperature were significantly lowered, the relative crystallinity degree decreased, and the setback was significantly increased. In the case of Ilpum, a mid-late maturing rice variety, the distribution of amylopectin short chains tended to increase when rice was transplanted on June 30^th.

• 한국유기농업학회지
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• 제13권3호
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• pp.291-300
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• 2005

우리나라 벼 유기농업 실천농가의 가장 큰 애로사항은 알려져 있는 병해 및 잡초 제어기술을 정립하기 위하여 강화 등 5개 지역의 벼 유기농재배지와 관행재배지에서 병해충의 발생 실태를 조사한 결과는 다음과 같다. 1. 병해 발생조사결과 도열병은 관행재배지보다 오리농법 재배지에서 발병이 많았고 품종별로는 추청벼 보다 일품벼에서 발병이 많았으며, 잎집무의마름병은 오리농법과 쌀겨농법재배지에서 발병이 많았고 품종별로는 추청벼 보다 일품벼에서 발병이 많았으며, 문고병도 관행재배지보다 오리농법과 쌀겨농법에서 발병이 많은 경향이었다. 2. 친환경 자재의 벼 종자소독 효과시험 결과 현미식초 1,000배액이 키다리병 방제에 효과가 있었으며 발아율도 양호하였고, 시중에 종자소독용으로 유통되고 있는 친환경자재의 도열병에 대한 예방 및 치료효과는 미미하였다. 3. 헤어리벳치 재배구의 헤어리벳치 건물 중이 이앙시기에 추천량의 1/40에 불과하여 헤어리벳치 재배에 의한 토양물리성의 변화는 없었다. 4. 헤어리베치 잎과 뿌리의 추출물질은 상추종자의 발아 억제효과를 보였다.

• 한국식품영양학회지
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• 제25권4호
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• pp.762-769
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• 2012

In order to study the cooking characteristics of four rice cultivars of Seolhyangchal, Baegjinju, Ilpum and Haiami, we investigated the relationship between the textures of cooked rice and their physicochemical properties. Different levels in grain weight. length/width ratio and amylose content were observed among the four rice cultivars. There was no significant difference in the amylopectin chain length distribution among the cultivars. Water absorptions of rice grains during soaking were completed between 30 and 40 min, with Haiami showing the slowest absorption. Significant differences in the viscosity properties of rice flour were found by a Rapid Visco Analyser. Baegjinju with low amylose content had the highest viscosity in paste breakdown. According to the DSC results of rice starches, there were significant differences in the onset, peak and conclusion temperatures of the endothermic peak. Gelatinization enthalpy showed energy content changes between 4.20 and 6.97 J/g, with the lowest change in Haiami. Texture properties of cooked rice were assessed using a Texture Analyzer, which showed that the hardness of cooked rice was decreased with soaking than without soaking. However, this finding was not applicable for Haiami rice.

• Current Research on Agriculture and Life Sciences
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• 제31권2호
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• pp.124-130
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• 2013

환경변화 중요성과 유전적 안전성은 최근에 증가추세의 형질전환 작물에 인식되고 있다. 본 실험은 건조저항성 형질전환체 작물의 유전적인 안전성과 환경변이에 따른 농업적인 특성을 분석하였다. 내건성 형질전환체인 CaMsrB2-8, 23과 모품종인 '일미' 및 일반품종을 대조구로 GM필드에서 작물학적 생육특성을 조사하였다. 농업적인 생육 특성에서 CaMsrB2-8, 23 계통은 모품종인 '일미'와 년차간, 지역별 평균으로 표현형은 유사하였다. 수량에서 년도별, 지역별 차이는 있지만 통계적인 유의성은 없었다. 현미의 미립특성에서 CaMsrB2-8, 23은 모품종인 '일미'와 차이를 보이지 않았다. 현미의 화학적 성분 분석에서 CaMsrB2-2 계통의 전분과 단백질함량은 모품종인 '일미'보다 일반품종인 '일품' 화학적 성분함량이 유사하였다. 본 실험결과에서 내건성 형질전환체인 CaMsrB2-8, 23는 GM 작물의 후대에서도 유전적인 안전성과 함께 수행될 수 있을 것으로 사료된다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.293-293
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• 2017

The objective of this study was to determine physicochemical changes in brown rice during ageing condition. Five varieties (Haiami, Ilpum, Daecheong, Jungwon, and Dasan1) of brown rice were stored at $35^{\circ}C$ for 8 weeks. Crude protein and lipid content, seed germination rate, fat acidity, tocol content, TOYO glossiness value, pasting properties, and composition of storage proteins were measured to evaluate its quality during storage. The isomers of tocols (tocopherol and tocotrienols) were quantified using HPLC system, and the pattern of variation in rice storage proteins was examined through electrophoresis of protein extracts. Seed germination rate decreased by 2.7 times, whereas the fatty acid value dramatically increased by 4.8 times after 8 weeks of storage. Toyo glossiness value of cooked milled rice considerably affected by storage period, and the pasting properties of milled rice were also influenced by storage. The final viscosity and breakdown value increased, but setback decreased during storage. In terms of storage protein, proportion of prolamin (14.3 kDa) and globulin (26.4 kDa) increased, whereas percentage of glutelin (34-39 kDa and 21-22 kD) decreased. Furthermore, the contents of total tocol and isomers decreased in stored brown rice.

• 한국작물학회지
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• 제42권3호
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• pp.255-262
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• 1997

벼 군락에서 건물생산량을 태양광의 반사스펙트럼 특성을 이용하여 추정하고자 1993년 4월부터 10월까지 경기도 소재 수원기상대 구내 포장에서 조생종 진부벼와 중만생종 대청벼, 일품벼를 공시 품종으로 하고 생육시기별 태양광 반사스펙트럼과 건물중을 조사한 결과 다음과 같다. 1. 출수전에 근적외광 파장대(720∼l,100nm)의 반사율을 가시광 파장대 (400∼700nm)의 반사율로 나눈 비율이 건물생산량과 상관이 높았으며, 가시광 파장대 중에서도 녹색, 적색파장보다 청색파장(400∼500nm)의 반사율로 나눈 비율이 건물생산량과의 상관이 높았다. 2. 적외광 파장의 반사율을 청색파장의 반사율로 나눈 비율 중에서 특히 R910 /R460 비율이 건물생산량과 가장 높은 정의 상관을 보였다. 3. 출수이전에 R910/R460 비율과 건물생산과의 회귀식을 이용한 추정식 Y=21.24284 X-212.734는 실측치와의 상관관계는 매우 높았다. 4. 출수이후엔 근적외광 파장(720∼l,100nm)의 반사율을 적색파장(600∼700nm)의 반사율로 나눈 비율이 청색이나 녹색파장의 반사율로 나눈 비율보다 건물생산량과의 상관이 더 높았다.

• The Plant Pathology Journal
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• 제16권3호
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• pp.151-155
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• 2000

A cDNA (Oslls1) encoding Lls1-homologue of maize was isolated from cDNA library of rice (Oryza sativa cv. Ilpum). The 2,138 bp of full length Oslls1 clone contains an open reading frame of 1,623 nucleotides encoding 575 amino acid residues. The deduced amino acid sequence of Oslls1 has a high level of homology with chlorophyll a oxygenases of Arabidopsis thaliana (67%) and Marchantia polymorpha (65%). Southern blot analysis of genomic DNA indicates the existence of a small gene family for Oslls1 in the rice genome. The expression of Oslls1 mRNA was induced in leaves and germinating seeds. Treatment of $H_2O$$_2$significantly down-regulated Oslls1 expression. The expression of Oslls1 mRNA was consititutively down-regulated in the blm, a rice mutant exhibiting spontaneous necrotic lesions. These results suggest that this Oslls1 gene may be involved incell death mechanisms in the blm mutant of rice.