• 제목/요약/키워드: Shindongjin

검색결과 19건 처리시간 0.032초

Influence of Rainfall During the Ripening Stage on Pre-Harvest Sprouting, Seed Quality, and Longevity of Rice (Oryza sativa L.)

  • Baek, Jung-Sun;Chung, Nam-Jin
    • 한국작물학회지
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    • 제59권4호
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    • pp.406-412
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    • 2014
  • The influence of rainfall during the ripening stage on pre-harvest sprouting, seed viability, and seed quality was investigated in two Korean rice cultivars, Shindongjin and Hopum. When the rainfall was artificially treated in a greenhouse, HP started to pre-harvest sprouting at three days of rainfall treatment (DRT), but Shindongjin did not show pre-harvest sprouting at 40 DAH treatment and just 0.3~0.8% at 50 DAH, which was much lower than 15.3~25.8% of Hopum in the same treatment. After harvest, the seed germination of Hopum decreased about 10~25% compared to non-treated seeds, but that of Shindongjin decreased much little rate than that of Hopum. The seed longevity tested by accelerated aging decreased with prolonged rainfall period in both cultivars, but the varietal difference was clear; Shindongjin could withstand longer accelerated aging than Hopum. Shindongjin maintained its germination (>50%) ability after 15 days of accelerated aging regardless of the rainfall treatment period and time, but Hopum dropped below 50% germination ability after only 5 days of accelerated aging. In conclusion, rainfall during the ripening stage induced not only pre-harvest sprouting, but also reduced seed quality and longevity during storage, which varied between two cultivars.

Molecular Characterization of Granule-Bound Starch Synthase (GBSSI) gene of Waxy Locus Mutants in Japonica Rice (Oryza sativa L.)

  • Sohn, Seong-Han;Rhee, Yong;Hwang, Duk-Ju;Lee, Sok-Young;Lee, Jung-Ro;Lee, Yeon-Hee;Shin, Young-Seop;Jeung, Ji-Ung;Kim, Myung-Ki
    • 한국육종학회지
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    • 제42권1호
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    • pp.1-10
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    • 2010
  • Five mutants were investigated at the molecular level to determine the factors responsible for mutated endosperm types. They were classified as high (HA) or low amylose (LA) phenotypes based on the amylose content in endosperm. The five were previously produced from Ilpum and Shindongjin cultivar treated with N-methyl-N-nitrosourea and gamma-ray irradiation, respectively. Analysis of the genomic structure and expression of Granule-bounded Starch Synthase I (GBSSI) genes revealed that mutants generally showed a higher incidence of nucleotide transition than transversion, and the $A:T{\rightarrow}G:C$ transition was particularly prevalent. The rates of nucleotide substitution in HA mutants were generally higher than those in the LA mutants, leading to higher substitutions of amino acid in the HA mutants. Neither nucleotide substitutions interfering with intron splicing or causing early termination of protein translation were found, nor any large-sized deletions or additions were found in all the mutants. In principle, amylose content can be regulated by three factors: internal alterations of GBSSI protein, the strength of gene expression, and other unknown external factors. Our results indicate that the endosperm mutants from Shindongjin arose from internal alterations of GBSSI proteins, which may be the result of amino acid substitutions. On the other hand, the Ilpum mutants might be principally caused by the alteration of gene expression level. Analysis of another three glutinous cultivars revealed that the major factor leading to glutinous phenotypes is the 23-bp duplicative motif (5'-ACGGGTTCCAGGGCCTCAAGCCC-3') commonly found in exon 2, which results in the premature termination of protein translation leading to the production of a non-functional GBSSI enzyme.

Monitoring of Rice Quality for Jeonju Bibimbab

  • Lee, Song-I;Lee, Deok-Ryeol;Cho, Seung-Hyun;Kim, Kab-Cheol;So, Soon-Young;Lee, Ki-Kwon
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2017년도 9th Asian Crop Science Association conference
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    • pp.370-370
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    • 2017
  • This study was carried out to investigate the current use and the demand for Jeonju-bibimbab rice and to suggest the suitable range of bibimbab rice. We conducted a survey on varieties and rice quality of Jeonju bibimbab restaurants from April to August 2016. In a survey of 12 bibimbab restaurants in Jeonju, the restaurants showed that 83% of the 10 restaurants were using shindongjin rice variety. Characteristics of rice suitable for bibimbab were showed low stickiness, high hardness, so it should keep the shape of rice when cooked and mixed with the ingredients. and people tend to prefer a large grain of rice. Also, the rice used in bibimbab restaurants were examined the average percentages of head rice ratio 89%, protein content 6% and moisture content 14.5%. These results suggest that the quality of rice, which is suitable for bibimbab, is similar to the range of common rice. Thousand grain weight over 24g is especially preferred. In conclusion, the quality and grain size of rice preferred for bibimbab rice was the level of Shindongjin.

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Amylose, Tocopherol, Free Sugar and Fatty Acid Content in Selected Mutant Lines of Oryza sativa cv. Shindongjin

  • Cho, Yoo-Hyun;Lee, Sok-Young;Kim, Seong-Min;Yu, Jae-Woong;Lee, Jung-Ro;Hong, Ha-Cheol;Kim, Jung-Bong;Ma, Kyung-Ho;Kwon, Taek-Ryun;Kang, Hee-Kyoung;Lee, Gi-An;Gwag, Jae-Gyun;Kim, Tae-San;Park, Yong-Jin
    • Journal of Crop Science and Biotechnology
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    • 제11권3호
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    • pp.181-186
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    • 2008
  • To assess the potential as biofortified rice varieties, new endosperm and grain mutant lines were selected from $M_4$ generation seeds of the rice cultivar Shindongjin, which were either $\gamma$-irradiated or treated with N-methyl-N-nitrosourea(MNU) and lipid, sugar, and tocopherol content were analyzed. Amylose content in non-waxy mutants ranged from 8.8% in SM-4, a dull-type mutant, to 29.5% in SM-51, compared to 18.9% in the parental variety, Shindongjin. SM-23, a floury-type mutant, contained 0.09 ${\mu}g/g$ $\alpha$-tocopherol(40.9% of total tocopherol), was three times higher than in the parental variety. SM-32, a giant embryo-type mutant, had a 2.2-fold higher total tocopherol content, 2.1-fold higher $\alpha$-tocopherol, and 5.5-fold higher $\delta$-tocopherol content(47.3% of total tocopherol) than the parental variety(0.13 ${\mu}g/g$). Total free sugar content was elevated in all selected mutants and 1.2-8.6 times higher than in the parental variety(11.38 ${\mu}g/g$). These increased sugar levels were due to increase in sucrose concentration. SM-23(floury-type mutant) and SM-51(high amylose-type mutant) had 4.6 and 7.0 times more sugar, respectively, than the parental variety(11.38 ${\mu}g/g$). With relatively high concentrations, most mutants showed elevated fatty acid content in the SM 32(giant embryo-type) and SM-51(high amylose-type) mutants, at 124.56 and 89.59 mg/g, respectively. All selected mutants displayed valuable characteristics for the development of new varieties in rice-breeding programs.

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저품질 관측자료를 사용한 벼 생육 모델의 신동진 품종모수 추정 (Calibration of cultivar parameters for cv. Shindongjin for a rice growth model using the observation data in a low quality)

  • 현신우;김광수
    • 한국농림기상학회지
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    • 제21권1호
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    • pp.42-54
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    • 2019
  • 작물 생육모델이 요구하는 다양한 모수들 중 품종의 유전적 특성을 나타내기 위한 품종모수는 개별 품종별로 추정되어야 한다. 모수 추정을 위해 상당한 비용과 노력이 요구되는 고품질의 상세한 생육자료를 사용하여 하나, 자료의 가용성이 대체로 낮기 때문에, 품질이 낮더라도 쉽게 얻을 수 있는 자료를 이용하여 품종모수를 추정하는 방식의 가능성과 문제점을 파악하는 것이 필요하다. 본 연구에서는 신품종개발 공동연구 보고서로부터 2005년부터 2016년까지 신동진 벼에 대한 자료들을 수집하고, 이를 사용하여 신동진 벼의 품종모수를 추정하였다. 또한, 추정된 모수를 사용한 생육모의 결과들을 활용하여 개별 항목에 대한 신뢰도를 평가하였다. 출수기에 대해서는 RMSE가 대부분 3일 이하로, 비교적 정확하게 모의할 수 있는 모수가 추정되었다. 수량에 대해서는 RMSE가 대부분 700 kg/ha 이하로 작게 나타났으나, 결정계수가 대부분 0.1 이하로 나타나, 신뢰도 높은 모수가 추정된 것으로 판단하기 어려웠다. 이러한 결과는 작물이 자라는 중간 단계의 생육 관측자료를 비교하지 못하였기 때문일 것으로 사료되었다. 따라서, 모수의 신뢰도를 높이기 위해 시기별 생육자료의 측정이 필요할 것이며, 이를 위한 시간과 비용을 절감하기 위한 기법이 개발되어야 할 것이다. 기상자료와 실제 기상과의 차이로 인한 오차를 줄이기 위해서는 방재기상자료와 같은 가까운 기상자료를 사용하거나, 공간내삽 등의 방법을 활용하여야 할 것이다. 또한, 자연재해와 같이 모델에서 고려할 수 없는 요인으로 인해 영향을 받은 자료는 제외하는 것이 모수의 신뢰도를 높일 수 있을 것이다. 본 연구에서 제시한 출수기와 수량 추정치의 오차가 작았던 모수들의 범위는 이후 연구에서 신동진과 유사한 품종의 모수를 추정할 때 참고자료로 사용될 수 있을 것이다.

전북지역 간척지에서 최고품질 벼 품종의 작물학적·이화학적 특성 비교 및 선발 (Evaluation of Various Characteristics of High Quality Rice Varieties That Could Potentially be Grown on Reclaimed Land in Jellabuk Province, Korea)

  • 최창학;김갑철;이덕렬;조승현;조대호;이송이;이인석
    • 한국작물학회지
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    • 제63권3호
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    • pp.196-204
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    • 2018
  • 현재까지 최고품질 벼 품종은 수광벼를 포함하여 15개 품종이 육성되었다. 본 연구는 이 중 전북지역 적응 품종(7개)을 대상으로 간척지에 적합한 품종을 선발하기 위해 생육특성, 수량, 품질 및 식미치를 분석한 결과는 다음과 같다. 1. 출수기는 2년 평균 수광벼가 가장 8월 12일로 가장 빨랐고, 영호진미의 분얼수는 2년 동안 평균 19개로 편차가 없어 재배 안전성이 우수하였다. 간장은 2년 평균 수광벼가 81.8 cm로 가장 컸고 수장은 현품벼가 가장 컸다. 2. 포장도복, 깨시무늬병, 잎짚무늬마름병 및 기타 병해충도 모든 품종에서 2년간 관찰되지 않았다. 3. 등숙률은 2015년에 수광벼가 가장 높았지만 2016년 및 2년 평균은 품종간 차이가 없었다. 천립중은 신동진벼가 2년 평균 27.7 g으로 가장 높았고, 6개 품종은 유의적인 차이가 없었다. 수당립수는 2015년에 신동진벼가 가장 많았고 2016년에는 호품벼 및 수광벼가 많았다. 그러나 2년 평균값은 품종별 차이가 없었다. 수량은 2년 평균은 신동진벼(590) > 호품벼(575) > 영호진미벼(552) > 수광벼(551) > 호품벼(543) > 미품벼(534) > 해품(498 kg/10a)순으로 높게 조사되었으나 유의성은 없었다. 호품벼의 연 차간 수량 차이가 108 kg/10a로 가장 컸고 영호진미벼(12 kg/10a), 미품벼(20 kg/10a) 및 수광벼(24 kg/10a)의 연차간 수량차이가 상대적으로 적어 재배 안정성을 보였다. 2년간 천립중, 수당립수 및 수량의 평균값에 대해 상관관계를 분석한 결과 천립중 차이가 수량 차이의 직접적인 원인인 것으로 확인되었다(p < 0.05). 4. 2015년에 완전립 비율은 미품벼, 영호진미벼, 해품벼, 현품벼 및 신동진벼가 유의성 있는 증가를 보였고, 2016년에는 영호진미벼의 완전립 비율이 가장 높았다. 그러나 2년 평균값은 품종들간 유의성이 없었다. 단백질 함량은 2015년에는 영호진미벼, 2016년에는 해품벼에서 유의성 있는 차이를 보였으나 2년 평균값은 차이가 없었다. 아밀로스 함량은 수광벼의 2년 평균값이 가장 낮았으나 다른 품종들과 유의성은 없었다. 토요식미계의 값은 미품벼 및 수광벼 순으로 높았다. 5. 따라서 수량 및 완전미율 연차간 변이, 단백질 및 아밀로스 함량, 토요식미치를 기준으로 평가했을 때 전북지역 간척지 적합 품종은 수광벼로 판단된다.

고기능성 쌀단백질 소재 개발 연구 (A study on the development of high functional food protein ingredient from rice bran)

  • 이의석;김기종;김재현;홍순택
    • 농업과학연구
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    • 제37권1호
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    • pp.61-68
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    • 2010
  • Rice bran proteins from different cultivars(Youngan, Sindongjin, Suwon 511) were extracted with Xylanase using orthogonal analysis method and their functional properties were investigated. The optimum extraction conditions, based on protein content in the extract found to be at 1 wt% xylanase, pH 7 and 50:1, solvent to rice bran ratio(v/w %). Nitrogen solubility indices(NSI) of rice bran protein concentrates were shown a minimum value at pH 4 ranged 2~23%, varied with different cultivars and a maximum (NSI${\geq}$90% for all cultivars) at pH 10. As for water adsorption and fat adsorption capacity, rice bran protein concentrates were shown to be better than Na-caseinate and isolated soy protein, respectively. Emulsifying activities were observed high in order of Na-caseinate>Youngan rice bran protein>Shindongjin rice bran protein>Suwon 511 rice bran protein>isolated soy protein. In general, the surface tension of rice bran protein solution($10^{-3}$ wt%, 5 mM bis-tris, pH 7) was increased with increasing concentrations and found a minimum value near pI. On heating, it was decreased slightly with increasing temperatures up to $70^{\circ}C$ and then increased above $80^{\circ}C$. Addition of sodium chloride was made the surface tension decrease. In conclusion, with Xylanase, rice bran protein concentrate can be successfully extracted from the rice bran of different cultivars and the Youngan rice bran protein was thought to have best functionality among rice cultivars tested. It might be used as a milk protein substitute.

Evaluation of Rice Nitrogen Utilization Efficiency under High Temperature and High Carbon Dioxide Conditions

  • Hyeonsoo Jang;Wan-Gyu Sang;Yun-Ho Lee;Hui-woo Lee;Pyeong Shin;Dae-Uk Kim;Jin-Hui Ryu;Jong-Tak Youn
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2022년도 추계학술대회
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    • pp.168-168
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    • 2022
  • According to the 5th Climate Change Report, global average temperature in 2081~2100 will increase 1.8℃ based on RCP 4.5 and 3.7℃ based on RCP 8.5 from the current climate value (IPCC Working Group I AR5). As temperature is expected to increase due to global warming and the intensity and frequency of rainfall are expected to increase, damage to crops is expected, and countermeasures must be taken. This study intends to evaluate rice growth in terms of nitrogen utilization efficiency according to future climate change conditions. In this experiment, Oryza sativa cv. Shindongjin were planted at the SPAR facility of the NICS in Wanju-gun, Jeollabuk-do on June 10, and were planted and grown according to the standard cultivation method. Cultivation conditions are high temperature, high CO2 (current temperature+4.7℃·CO2 800ppm), high temperature (current temperature+4.7℃·CO2 400ppm), current climate (current tempreture·CO2 400 ppm). Nitrogen was varied as 0, 9, 18 kg/10a. The N content and C/N ratio of all rice leaves, stems, and seeds increased at high temperature, and the N content and C/N ratio decreased under high temperature and high CO2 conditions com pared to high temperature. Compared to the current climate, NUE increases by about 8% under high temperature and high CO2 conditions and by about 2% under high temperature conditions. This seems to be because the increase in temperature and CO2 induced the increase in biomass. ANUE related to yield decreased by about 70% compared to the current climate under high temperature conditions, and decreased by about 45% at high temperature and high CO2, showing a tendency to decrease compared to high temperature. This appears to be due to reduced fertility and poor ripening due to high temperature stress. However, as the nitrogen increased, the number of ears and the number of grains increased, slightly offsetting the production reduction factor.

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벼 등숙일수에 따른 이삭 착생 부위별 종자의 수발아 변이 (Pre-Harvest Sprouting Variation of Rice Seeds Located on Each Panicle Position According to Grain Filling Days)

  • 백정선;정남진
    • 한국작물학회지
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    • 제59권1호
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    • pp.22-26
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    • 2014
  • 본 연구는 벼의 출수 후 일수에 따라 수발아 양상을 조사하고 수발아 피해가 발생할 수 있는 시기를 예측하여 수발아 방제를 위한 기초자료를 얻고자 수행하였으며, 그 결과를 요약하면 다음과 같다. 1. 벼 등숙기간 중 호품벼는 출수 후 20일, 신동진벼는 출수 후 30일부터 수발아 조건이 충족되면 발아가 시작되었으며, 50% 이상의 종자가 발아력을 갖는 시기는 호품벼가 약 35일, 신동진벼가 약 45일이었고, 출수 후 50일에는 두 품종에서 모두 80% 이상의 종자가 발아하였다. 2. 한 이삭 내에서 종자의 위치에 따른 수발아의 순서는 상위부 > 중위부 > 하위부 순으로 나타났으며 지경별로는 2차 지경보다는 1차 지경의 것이 높게 나타났다. 3. 수발아 검정 시 미발아된 종자는 배의 미숙, 종자휴면, 종자의 등숙불량 (불완전립)이 원인인 것으로 판단되었다. 4. 출수 후 30~45일의 등숙중기에 신동진벼는 호품벼보다 종자 휴면성이 높았다.