• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.331-331
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• 2017

This study was conducted to know the influence of air temperature and sunshine duration on yield, chemical component, pigment color difference and starch characteristics of two colored rice cultivars in the plain area of Yeongnam province in Korea. The $L^*$, $a^*$, and $b^*$ value of brown rice in Hongjinju and Josaengheugchal rice cultivars was significantly different at continuous cultivated years, 2015 and 2016. The $L^*$, $b^*$ value of two colored rice was significantly increased in 2016 compared to 2015. The $a^*$ value of Josengheugchal rice cultivar was also significantly higher at 2016 than at 2015. It can be noticed the $a^*$, $b^*$, $L^*$ values in Josaengheugchal varied more than those in Hongjinju. Air temperature during ripening period in 2016 was higher than 2015, especially minimum temperature was too high to proper maturation for rice quality. In Josaengheugchal rice cultivar, sunshine duration after heading was longer in 2016 than in 2015. On the contrary, Hongjinju rice cultivar was ripened under condition of insufficient sunshine duration in 2016. The short growing duration by high temperature and long shiny duration made the lack of pigment for Josaengheugchal brown rice. In Hongjinju rice cultivar, shorten sunshine duration and higher night temperature were the source of the pigment deficiency. The grain size of rice which produced in 2016 was bigger than that of 2015 in both rice cultivars. The 1,000 grain weight of rice from 2016 was also bigger than that of 2015. Head rice ratio was high in the rice cultivars produced in 2015. Protein of milled rice in 2016 was more decreased than that of 2015 in Josaengheugchal rice cultivar, it showed reverse result in Hongjinju rice cultivar. Amylose contents of milled rice in 2016 were more decreased than that of 2015 in Hongjinju rice cultivar. Branch chain length distribution of amylopectin was shown a distinct difference between Josaengheugchal and Hongjinju rice flours by each produced year. Josaengheugchal rice cultivar produced in 2015 had a higher amount of short chains than that of 2016 rice starches. In Josaengheugchal rice cultivar, the pasting temperature and peak, trough, breakdown, final viscosity increased in rice flour which produced at 2016, whereas the setback viscosity and peak time showed lower value than those of rice from 2015. The most pasting properties (except of setback viscosity) of rice starch in Hongjinju rice cultivar grown in 2015 were higher than those of rice cultivar produced in 2016.

• 한국작물학회지
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• 제61권4호
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• pp.235-241
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• 2016

Three different transplanting dates for two rice cultivars grown in Daegu, Republic of Korea, were examined to identify the changes in growth, rice quality, and characteristics of amylopectin. An early transplanting date caused a reduction in the number of panicles in both rice cultivars compared to that in the optimal and late transplanting dates. The 1000-grain weight in the two rice cultivars was significantly increased in the late transplanting date. The rice cultivar tolerant to high temperatures, Donganbyeo, exhibited the lowest milky grain rate in the late transplanting date. The highest rate of head grain was observed in the late transplanting date in both rice cultivars. Regarding the pattern of pasting properties, peak viscosity increased with delayed transplanting dates. With respect to changes in the amylopectin branch-chain length distribution, the amylopectin structure of the translucent Dongan rice cultivar transplanted on April 25 was characterized by a significant increase in A chains with DP > 12, and a decrease in long chains $DP{\geq}37$ compared to that transplanted on June 25. In contrast, the amylopectin structure of the chalky Dongan rice cultivar transplanted on April 25 exhibited further decrease in 13 < DP < 19 than that transplanted on June 25. In the Ungwang rice cultivar, the amylopectin structure of the translucent Ungwang rice cultivar transplanted on April 25 and June 25 was characterized by a significant decrease in the lengths of total amylopectin chains. Furthermore, the amylopectin structure of the chalky Ungwangbyeo rice cultivar transplanted on April 25 was characterized by a significant increase in 7 < DP < 30, while a significant decrease was observed in that transplanted on June 25. These results indicate that the amylopectin structure is altered by different transplanting dates depending on the characteristics of the rice cultivar.

• 한국자원식물학회지
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• 제30권3호
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• pp.318-322
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• 2017

The study was carried out to determine the changes of growth characteristics, anthocyanidin, and brown rice yield grown at coast and inland areas apart from the east coastline of Gyeongsangbuk-do province. Number of spikelets per panicle was much more increased in inland area. Regional difference in number of spikelets per panicle was observed in Jeongjinju cultivar. Among these red rice cultivars, the highest brown rice yield was Jeongjinju rice cultivar having 702 kg in inland area and 692 ㎏ in coast area, respectively. Anthocyanidin content ranged 524 to $610{\mu}g/g$ dry weight basis. Cyanidin content was 11.4 to 14.0 times higher than that of delphinidin under coast and inland area. Anthocyanidin content was higher in rice cultivar grown at coast area. Highest head brown rice rate was only observed in Geonganghongmi to 95.2 at coast area and 95.4 inland area. In considering brown rice yield and pigment content, Hongjinju rice cultivar was recommended in optimal pigment rice cultivar in eastern coast of Gyeongsangbuk-do Province.

• 생명과학회지
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• 제11권2호
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• pp.121-125
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• 2001

Some attempts were made to investigate the biological characterisitcs of the green rice leafhopper(GLH) , Nepthotettix cincticeps Uhler in terms of nymphal development, emergence ratio. preovipositional period, growth index, adult longevity and fecundity fed on rice cultivar, Chucheongbyeo with no resistance gene and water foxtail, Alpecurus aequalis Sobol. var. amurensis Ohwi at 20 and $25^{\circ}C$ with a 16L;8D photoperiod. Development period of nymph on rice cultivar and water foxtail at $25^{\circ}C$ was shorter than that at 2$0^{\circ}C$ by twofold. The nymphal period of female was about one day longer than that of male. The mean emergence ratio of female and male on rice cultivar and water foxtail was 40.0, 76.7, 38.3, 73.3% at 20 and $25^{\circ}C$, respectively. Preovipositional period on rice cultivar and water foxtail at $25^{\circ}C$ was shorter that at 2$0^{\circ}C$ by twofold. Growth index on rice cultivar adn water foxtail at $25^{\circ}C$was higher than that at 2$0^{\circ}C$ by fourfold. Under the 20 and $25^{\circ}C$ condition, the longevity of female and male was longer on water foxtail than on rice cultivar, but the fecundity of GLH was higher on rice cultivar than on water foxtail. In conculsion, water foxtail seems to be adequate for spring host of GLH.

• 한국작물학회지
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• 제44권3호
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• pp.181-185
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• 1999

To compare the composition of volatile flavor components of three different cultivars of rice, Hyangnambyeo (aromatic cultivar), Heugjinjubyeo (pigmented cultivar) and Dongjinbyeo (normal cultivar), the volatile flavor components of brown rice were isolated by Likens-Nickerson simultaneous steam distillation and extraction apparatus. The flavor concentrates obtained were analyzed by gas chromatography and gas chromatography-mass spectrometry. A total of 65 components, including 14 aliphatic aldehydes and ketones, 7 aliphatic alcohols, 8 aromatic alcohols, 13 hydrocarbons, 9 esters, 7 aliphatic acids, and 7 miscellaneous components were identified. The aliphatic aldehydes, which are known as contributors to the overall flavor of cooked rice, were present in larger amounts in Hyangnambyeo than in Heugjinjubyeo and Dongjinbyeo, while the difference in quantity of these components between Heugjinjubyeo and Dongjinbyeo was not remarkable. Hyangnambyeo and Heugjinjubeyo contained 562 ng and 259 ng of 2-acetyl-1-pyrroline per gram of brown rice based on dry weight, respectively, which is a key compound contributing to the popcorn-like aroma in aromatic rice. Dongjinbeyo contained about 6 ng.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.335-335
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• 2017

Recently NERICA (New Rice for Africa) was developed by a crossing of African rice (Oryza glaberrima Steud.) and Asian rice (Oryza sativa L.) in West Africa, and is considered to be drought resistant, but drought resistance of NERICA and differences between Asian rice are not clarified enough. In this research, NERICA (four cultivars and two lines), Asian rice (three cultivars and sativa parent of NERICA) and African rice (glaberrima parent of NERICA) were cultivated in the field in Shizuoka University under drought and traits of each cultivar and line relevant to drought resistance, stomatal conductance by porometer, soil water content of individual depths by TDR method, SPAD values by SPAD meter and leaf thickness by micrometer, were measured and compared with dry matter production and yield. Effects of compost were also compared among sativa parent, one NERICA cultivar and two NERICA lines. Glaberrima parent showed highest top dry weight. One NERICA line, one drought resistant Asian rice cultivar and sativa parent, showed higher top dry weight and yield (ear weight) than other Asian rice cultivars and NERICA cultivars and line tested. Compost tended to increase top dry weight and yield in one of NERICA line and sativa parent. But in one NERICA cultivar and line, top dry weight and yield were not increased. In one of Asian rice, one of NERICA line and sativa parent that showed high top dry weight and yield, stomatal conductance was high. On the contrary the glaberrima parent and in other NERICA cultivars and line it was low. In sativa parent compost increased stomatal conductance but in NERICA cultivar and lines it was not. Among cultivars and lines that showed high top dry weight and yield sativa parent and one of NERICA line SPAD value and leaf thickness were high but in one of Asian rice and glaberrima parent they were low. Cultivar and line differences in yield and top dry weight among Asian rice and NERICA were significantly correlated with those in stomatal conductance ($r=0.778^{**}$ and $r=0.654^*$, respectively) and those in leaf thickness ($r=0.600^*$ and $r=0.640^*$, respectively). In Asian rice cultivars average soil water content was significantly correlated with yield ($r=0.886^*$) but in NERICA cultivars and lines it was not significant correlated (r= -0.256). Cultivar and line differences in leaf thickness were significantly correlated with SPAD value ($r=0.773^{**}$). In Asian rice cultivars it was significantly correlated ($r=0.962^{**}$), but in NERICA cultivars and lines it was not significantly correlated (r=0.559). Asian rice cultivars tended to consume soil water to increase yield but in NERICA cultivars and lines the tendency was not clear. Correlation between SPAD value and leaf thickness was different between Asian rice and NERICA cultivars and lines, and in Asian rice cultivars it was significantly correlated but in NERICA cultivars and lines it was not significant. Importance of maintaining high stomatal conductance by high leaf thickness was clarified.

• 한국식품저장유통학회지
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• 제19권1호
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• pp.81-86
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• 2012

다산, 큰섬, 고아미, 백진주, 설갱, 한강찰 및 흑설 등의 7가지 품종 쌀의 특성과 관련한 기초자료를 마련하고자 취반 특성을 조사한 결과는 다음과 같다. 쌀 곡립의 색도측정에서 L값은 설갱에서 가장 높았고, a값은 흑설에서 가장 높았으며, b값은 한강찰에서 가장 높았다. 상온수분흡수율에서 흑설은 80분, 다산, 고아미 및 한강찰은 50분, 백진주 및 큰섬은 30분 그리고 설갱은 10분에 포화수분흡수에 도달하는 것으로 나타났다. 쌀의 취반특성인 수분흡수율은 다수계 품종인 큰섬에서 351.38%로 가장 높았고, 부피팽창율은 226.97~551.08%, 용출고형물은 5.56~21.05%로 부피팽창율에서는 통일벼 품종인 다산이 가장 높았고, 용출고형물은 설갱이 가장 높았다. 취반한 쌀의 경도 측정에서는 유색미 품종인 흑설이 24.30 kg으로 가장 높았고, 찰벼품종인 한강찰이 7.49 kg으로 가장 낮았으며, 흑설 제외한 품종에서는 고아미가 가장 높았다. 취반한 쌀의 관능검사에서 맛, 질감 및 전체적인 선호도에서는 반찰벼 품종인 백진주가 가장 높은 선호도를 보였고, 색에서는 설갱, 향미에서는 흑설 그리고 외형에서는 한강찰이 가장 높은 선호도를 보였다. 다수계 품종인 다산과 큰섬은 질감을 제외한 항목에서 가장 낮은 선호도를 보였다.

• Plant Biotechnology Reports
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• 제2권1호
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• pp.41-46
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• 2008

Salinity stress is a major limiting factor in cereal productivity. Many studies report improvements in salt tolerance using model plants, such as Arabidopsis thaliana or standard varieties of rice, e.g., the japonica rice cultivar Nipponbare. However, there are few reports on the enhancement of salt tolerance in local rice cultivars. In this work, we used the indica rice (Oryza sativa) cultivar BR5, which is a local cultivar in Bangladesh. To improve salt tolerance in BR5, we introduced the Escherichia coli catalase gene, katE. We integrated the katE gene into BR5 plants using an Agrobacterium tumefaciens-mediated method. The introduced katE gene was actively expressed in the transgenic BR5 rice plants, and catalase activity in $T_1$ and $T_2$ transgenic rice was approximately 150% higher than in nontransgenic plants. Under NaCl stress conditions, the transgenic rice plants exhibited high tolerance compared with nontransgenic rice plants. $T_2$ transgenic plants survived in a 200 mM NaCl solution for 2 weeks, whereas nontransgenic plants were scorched after 4 days soaking in the same NaCl solution. Our results indicate that the katE gene can confer salt tolerance to BR5 rice plants. Enhancement of salt tolerance in a local rice cultivar, such as BR5, will provide a powerful and useful tool for overcoming food shortage problems.

• 한국식품조리과학회지
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• 제30권3호
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• pp.271-277
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• 2014

국내 쌀 소비확대를 위하여 가공용으로 재배 육성된 5개의 쌀 품종인 하이아미, 삼광, 고아미, 세계진미, 설갱을 이용하여 떡복이용 떡의 제조 적성에 적합한 쌀 품종을 파악하고자 쌀가루의 일반성분, 수분결합력, 수분흡수율, 호화특성을 조사하고, 쌀 품종별로 떡볶이 떡을 제조하여 물성 및 관능적 특성을 조사하였다. 쌀 품종별 일반성분을 측정한 결과 수분이 14.13-17.78%, 조단백질이 4.43-7.68%, 조지방이 0.45-1.84%, 조회분이 0.37-0.85%로 나타났다. 특히, 고아미는 수분, 조지방 및 조회분 함량이 가장 높았고 세계진미는 조단백질함량이 가장 높게 나타났다. 수분결합력은 고아미가 하이아미, 삼광, 세계진미 및 설갱에 비하여 높은 것으로 나타났다. 수침시간에 따른 수분흡수율은 수침 초기에 흡수속도가 높았으며 수침 3시간까지는 완만하게 증가하다가 그 이후에는 거의 변화가 없어 평형에 도달하였다. 쌀 품종별 떡볶이 떡의 관능적 특성의 전반적인 기호도에서 세계진미 > 설갱 > 삼광 > 하이아미 > 고아미 순으로 선호하는 것으로 나타났다. 쌀 품종별 떡볶이 떡 제조 시 부드러워 식감이 좋은 품종으로는 세계진미, 설갱, 삼광, 하이아미 순이었다. 반면 조직이 단단하고 아밀로스 함량이 높은 고아미는 부적합한 품종으로 나타났다.

• 농업과학연구
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• 제18권2호
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• pp.93-98
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• 1991

본(本) 논문(論文)은 줄무늬잎마름병(病)에 대한 일반계(一般系) 수도품종(水稻品種)의 저항성(抵抗性) 내력(來歷)을 밝히기 위하여 수행(遂行)되었다. 1. 낙동(洛東)벼, 화성(花成)벼, 광명(光明)벼, 영덕(盈德)벼, 동진(東津)벼, 계화(界火)벼, 화청(花淸)벼, 수원(水原)362, 이리(裡里)390, 밀양(密陽)64, 밀양(密陽)96, 밀양(密陽)101호(號)의 줄무늬잎마름병(病) 저항성원(抵抗性源)은 Modan에서 유래(由來)되었다. 2. 동진(東津)벼, 신선(新鮮)찰벼, 팔공(八公)벼, 화진(花津)벼, 섬진(蟾津)벼의 줄무늬잎마름병(病) 저항성(抵抗性)은 밀양(密陽)20호(號)와(또는) 낙동(洛東)벼에서 유래(由來)되었다. 3. 진주(眞珠)벼, 탐진(耽津)벼, 영덕(盈德)벼, 영산(榮山)벼의 줄무늬잎마름병(病) 저항성(抵抗性)은 HR769와(또는) 밀양(密陽)20호(號)에서 유래(由來)되었다. 4. 대청(大晴)벼의 줄무늬잎마름병(病)에 대한 저항성(抵抗性)은 낙동(洛東)벼와(또는) HR769에서 유래(由來)되었다.