• 한국작물학회지
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• 제48권5호
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• pp.397-401
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• 2003

This experiment was conducted to know the characteristics of kernel growth as affected by various temperature regimes during grain filling using the varieties Hwaseongbyeo, Ilpumbyeo and Chucheongbyeo. The rice plants tested were grown in the natural condition at 1/5000a Wagner pots until flowering. After flowering, the rice plants were moved to controlled temperature conditions in a phytotron. The minimum/maximum daily temperature in the phytotron was controlled by 12/18, 15/21, 18/24, 21/27, and 24/$30^{\circ}C$, respectively. The grain weights were measured every three days after treatment. The mean daily kernel growth rate during active grain filling period showed different responses among varieties under various temperature regimes. The kernel growth rate of Chucheongbyeo was seriously reduced as temperature regimes were decreased. However, that of Ilpumbyeo was not influenced so critically. Ilpumbyeo showed some advantages in grain filling under low temperature regimes compared to Chucheongbyeo. The lag phase in grain filling of Chucheongbyeo was the longest among tested varieties, followed by Hwaseongbyeo under daily mean temperature regime of $15^{\circ}C$. Kernel weight of Ilpumbyeo increased fast in early grain filling phase under low temperature. This characteristic may be favorable for grain filling in temperate zone where the daily mean temperature is drastically dropped during grain filling period. Regression analysis with kernel growth rate and temperature showed the estimated critical low temperature for grain filling among varieties were $9^{\circ}C$, $12^{\circ}C$, $13^{\circ}C$ in Ilpumbyeo, Hwaseongbyeo and Chucheongbyeo, respectively. Under moderate temperature the duration of grain filling of Ilpumbyeo was longer than that of Chucheongbyeo. However, Under low temperature that of Ilpumbyeo was more favorable than Chucheongbyeo.

• 한국작물학회지
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• 제53권3호
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• pp.285-291
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• 2008

This study was performed to find out starch properties of rice grains in three varieties with different amylose content, Ilpumbyeo (non-waxy), Goami2 (high amylose), and Hwasunchalbyeo (waxy rice). There was no difference among physico-chemical characteristics of rice grains, but Goami 2 showed $2{\sim}3$ folds higher crude fat (1.36%) than Ilpumbyeo. Pasting properties of RVA showed the highest values of maximum viscosity, breakdown, and final viscosity in Ilpumbyeo. A similar chain length distribution of amylopectin was found in Ilpumbyeo and Hwasunchalbyeo, indicating that DP 12 had the highest distribution. Goami 2 had the highest distribution in DP 14, and showed the lower percent (14.1%) than other rice cultivars. Thermal properties of DSC showed that the values of Tc and Tp of Hwasunchalbyeo were similar to Ilpumbyeo, whereas a slightly higher Tc was observed. The absorbtion enthalpy was also the highest (11.1 mJ/mg) in Hwasunchalbyeo. Goami 2 showed higher To, but the lowest enthalpy (6.52 mJ/mg) compared to Ilpumbyeo (7.92 mJ/mg). Retrogradation properties, which were measured with the gelatinized rice sample used for DSC, and stored in $4^{\circ}C$ during 6 days, indicated that retrogradation absorbtion peak was the first peak at $52.6{\sim}55.2^{\circ}C$, and the second peak above $95^{\circ}C$. Retrogradation enthalpy of Goami 2 was the highest value (5.12 mJ/mg).

• 농업과학연구
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• 제37권2호
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• pp.171-175
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• 2010

This study was carried out to find the effect on growing media and proper time for water supply in rice seedling stages. Plant height of rice seedling for SIPAN-BRL among current several growing medias was higher in Chuchungbyeo than Ilpumbyeo, and that of root length was higher in check among used growing medias. Fresh and dry weight of shoot and root of two rice cultivar. Water time to absorption on each treatment of growing media concentration took similarly in SIPAN-BNH and check were similar. But 500 minutes did in 100ppm and did 370 and 470minute in 300 and 500ppm, respectively. Wilting time of rice seedling was appeared highly at 300ppm of SIPAN-BRL in Chuchungbyeo and 100ppm of SIPAN-BRL in Ilpumbyeo, while it prolonged at 300ppm in Chuchungbyeo and 500ppm in Ilpumbyeo, respectively. Water content at wilting stage was appeared highly at SIPAN-BRL 500ppm in both Chuchungbyo and Ilpumbyeo, while SIPAN-BNL was high in 300ppm of Chuchung-byeo and Ilpumbyeo, respectively. Plant and root length of SIPAN-BNL treated with 300ppm in 10day-rice seedling were highly appeared, while dry weight of shoot was high at 300ppm SIPAN-BNL.

• 한국작물학회지
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• 제53권3호
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• pp.308-313
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• 2008

쌀 수입 개방과 소비량이 감소되고 국민의 생활수준이 향상 되면서 소비자는 고품질의 농산물을 추구하게 되었고, 밥맛이 좋은 품종 및 재배방법 개발에 대한 연구가 필요하게 되었다. 이와 같은 노력의 결과 일품벼를 육성하여 농업인에게 보급하였고 밥맛이 좋으면서 단위면적당 쌀수량이 많아서 농업인이 선호하게 되었다. 하지만 일품벼에 대한 선호도가 향상되는 단계에서 농협 및 지자체에서 쌀을 브랜드화 하면서 대형 미곡종합처리장이 설립되고 시설이 좋아지면서 벼를 산물로 수매하게 되고, 도정률에 의한 차등수매 체제로 변화되었다. 이러한 상황변화는 도정률이 낮은 품종을 미곡종합처리장 에서 수매를 기피하게 (RPC) 되고 이는 농업인이 외면하는 상태가 되었다. 그래서 본 연구는 도정률에 영향을 미치는 요인을 분석하여 일품벼의 도정률을 향상시키고, 품종육성 및 재배기술 개발에 기초자료를 제공 하고자 수행하여 얻은 결과를 보고하고자 한다. 1. 이삭당 영화수는 일품벼가 105개, 추청벼가 70개로 일품벼가 35개 많았으며, 지경별로 보면 1차지경의 벼알수 비율은 일품벼 56.2%, 추청벼 61.4%로 추청벼가 많고, 2차지경의 벼알수 비율은 일품벼가 43.3%, 추청벼가 37.9%이었다. 2. 등숙정도를 정조의 비중선에 의하여 분류하면 일품벼가 추청벼보다 충실도가 낮았는데, 일품벼와 추청벼의 차이는 정선 후에 0.47%, 비중 1.00에서 1.28%, 비중 1.10에서 6.27%, 비중 1.20에서 31.67% 낮았다. 3. 왕겨 1개의 무게는 일품벼 4.16 mg, 추청벼 3.92 mg이었으며, 정조 1 kg의 왕겨 무게는 일품벼 157.36 g, 추청벼 151.31 g으로 왕겨비율은 일품벼는 15.74%, 추청벼는 15.13%로 일품벼가 추청벼보다 0.61% 높았다. 4. 도정률은 콤바인 수확 산물벼의 정현비율은 일품벼가 81.22%, 추청벼가 82.52%로 일품벼가 추청벼보다 1.30% 낮았고, 현백비율은 일품벼가 92.14%, 추청벼가 92.51%로 일품벼가 추청벼보다 0.37% 낮았다. 5. 일품벼가 추청벼보다 도정률이 1.67% 낮은데 요인별로 분석 하면 왕겨의 무게 0.61%, 현백비율 0.37% 및 등숙정도 0.69%이다. 이는 왕겨무게와 현백비율은 유전적인 요인으로 극복하기 어렵지만 등숙정도에 영향하는 0.69%는 재배 및 수확 후 관리를 철저히 할 경우 경감시킬 수 있을 것으로 생각된다.

• 자연과학논문집
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• 제13권1호
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• pp.65-71
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• 2003

각종 미강 추출물들의 항고혈압성 엔지오텐신 전환효소 저해 활성을 측정하고 이들의 추출 최적조건을 검토하였다. 각종 미강 추출물들중에서 일품벼 미강의 물 추출물이 77%의 가장 높은 안지오텐신 전환효소 저해활성 보였다. 일품벼 미강중의 안지오텐신 전환효소 저해물질은 물을 1:10(w/v)으로 미강 분말에 첨가한 후 $30^{\circ}C$에서 12시간 추출하였을 때 가장 많이 용출되었다.

• 한국전자현미경학회:학술대회논문집
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• 한국현미경학회 2005년도 제36차 춘계학술대회 및 제3회 HVEM 이용자 워크샵
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• pp.26-26
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• 2005

• 한국환경농학회지
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• 제22권1호
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• pp.36-40
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• 2003

토양혼화실험을 통한 초장의 신장 억제를 조사한 결과 초장이 50% 억제되었을 때의 cyclosulfamuron의 농도를 품종별로 비교하여 보면 동진벼, 화성벼, 일품벼의 경우 각각 6.3, 9.2 146.8 mg/kg으로 동진벼가 제초제 cyclosulfamuron에 가장 민감하게 지상부의 생육이 억제되었다. 또한 cyclosulfamuron은 동일한 농도에서 지상부보다는 지하부의 생육을 더 크게 억제하였으며, 0.3mg/kg 처리 수준에서 동진벼의 경우 건물중의 억제정도는 지상부가 4.8% 정도이었으나 지하부는 38.9%이었다. 벼의 acetolactae synthase 활성을 cyclosulfamuron의 농도별로 검정한 결과 공시된 품종간에 큰 차이가 없었으며 50% 억제되는 농도는 화성벼, 동진벼 및 일품벼의 경우 각각 42.7, 32.7 및 $56.7\;{\mu}M$이었다.

• 한국작물학회지
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• 제47권6호
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• pp.471-474
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• 2002

산업의 발달로 농경지 주변에 야간조명이 증가되고 있어, 야간조명 광도에 따른 벼 생육 반응과 수량의 영향을 구명하고자 조생종인 흑진주벼, 중생중인 화성벼, 중만생종인 일품벼를 공시하여 야간조명 광도 1.0-20.0lux(0.3-5.$1\mu\textrm{W}$ $cm^{-2}$)에서 수행한 시험결과를 요약하면 다음과 같다. 1. 간장과 수장은 야간조명 광도간에 큰 차이가 없었으나, 망장은 야간조명 광도가 높을수록 증가되었고, 특히 화성벼의 망장은 야간조명 광도 2lux 이하에서는 1.93cm이었으나, 10-20 lux에서는 4.09cm로 현저히 길어졌다. 2. 출수는 야간조명 광도가 높을수록 지연이 심하였으며, 품종별로는 야간조명 광도 2 lux 이하에 비하여 10-20 lux에서 흑진주벼는 3일, 화성벼는 5일, 일품벼는 9일이 지연되어, 일품벼 ＞ 화성벼 ＞ 흑진주벼 순으로 지연이 심하였다. 3. $m^2$당 수수는 야간조명 광도가 높을수록 현저하게 감소되어 화성벼와 일품벼는 유의한 차이가 있었다. 4. 쌀 수량은 야간조명 광도 2 lux 이하에 비하여 10-20 lux에서는 조생종인 흑진주벼는 10.0%, 중생종인 화성벼는 17.7%, 중만생종인 일품벼는 20.7%가 감소되었다.

• 한국육종학회지
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• 제41권4호
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• pp.429-436
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• 2009

We conducted a QTL analysis of grain quality traits using 117 $BC_3F_4$ and $BC_3F_5$ lines developed from a cross between Ilpumbyeo and Moroberekan. Genotypes of 117 $BC_3F_5$ lines were determined using 134 simple sequence repeat (SSR) markers. A linkage map constructed using 134 SSR markers was employed to characterize quantitative trait loci (QTL). The 117 $BC_3F_4$ and $BC_3F_5$ lines were evaluated for eleven grain quality traits in 2005 and 2006. A total of 18 QTLs were identified for eleven traits, and the phenotypic variance explained by each QTL ranged from 9.9% to 35.2%. Moroberekan alleles contributed positive effects in the Ilpumbyeo background at two QTL loci for 1,000 grain weight. Four QTLs, two for chalky rice and one each for 1,000 grain weight and head rice were consistently detected in two consecutive years indicating that these QTLs are stable. Clusters of QTLs were observed in three chromosome regions. One cluster harboring five QTLs including head rice and brown rice ratio near SSR markers RM190 and RM314 was detected on chromosome 6. Another cluster harboring grain weight and white belly was detected on chromosome 2. Increase in white belly at this locus might be due to the increase in grain weight due to the presence of the Moroberekan allele. The Moroberekan alleles at two QTL loci, gw3 and gw4 associated with increased grain weight might be useful in breeding programs to develop high-yielding cultivars.

• 한국육종학회지
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• 제43권5호
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• pp.360-367
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• 2011

Beta-carotene producing transformants were produced in the background of 'Nagdongbyeo', a Japonica rice cultivar. Introgression of the carotenoid locus in the transformant, PAC4-2 into the elite cultivar 'Ilpumbyeo' was started. To initiate a backcrossing program, we surveyed 220 SSR markers and found that 38% of them were polymorphic between 'Ilpumbyeo' as a recurrent parent and the PAC4-2 as a recipient parent. The selection strategy comprising foreground and background selection was employed. First, foreground selection was practiced in $BC_1$, $BC_2$, and $BC_3$ generations using the transgene specific PCR-based marker in addition to visual scoring of the seed color. Marker-based background selection combined with phenotypic selection was employed from $BC_3F_2$ to $BC_3F_4$ generations. Blast search indicated that the transgene PAC4-2 was located between SSR markers, RM6 and RM482. 240 $BC_3F_3$ and 63 $BC_3F_4$ lines were evaluated for four agronomic traits including days to heading. Most of the lines were similar to Ilpumbyeo in agronomic traits evaluated. The percentage of PAC4-2 genome ranged from 4% to 21% with a mean of 12.5%, which was higher than the expected for an unselected $BC_3$ backcross population. This could be explained by the fact that two genes for beta-carotene and the stripe virus resistance were targeted in this study. We selected 10 representative $BC_3F_5$ lines from 63 $BC_3F_4$ lines based on agronomic traits and carotenoids content. The selection strategy would be appropriate for the introgression of beta-carotene gene in a breeding program.