다지역 검정 내냉성 형질의 QTL 분석

예종두,한용식,원동림,장문수,고희종 한국육종학회 2003 한국육종학회 학술발표회 발표요지 Vol.2003 No.9

IRCTN 공시 벼품종의 내냉성 특성분포

예종두,문헌팔,최임수,최해춘,백만기,적응기 한국육종학회 2001 한국육종학회 학술발표회 발표요지 Vol.2001 No.5

냉수 처리답에서 벼 생리 생장의 품종간 차이

예종두,최용환,양창인,이정일,이충근 한국육종학회 2004 한국육종학회 학술발표회 발표요지 Vol.36 No.1

벼에서 다지역 검정 내냉성 관련 형질 QTL 분석

예종두,고희종,한용식,강문수,원동림 한국육종학회 2004 한국육종학회 학술발표회 발표요지 Vol.36 No.1

벼 장해형냉해와 밀접한 화기형질의 저온장해

예종두,최해춘,문헌팔,황홍구,양창인 한국육종학회 2003 한국육종학회 학술발표회 발표요지 Vol.35 No.3

냉수처리답에서 벼 품종유형에 따른 저온반응

芮鍾斗 韓國作物學會 1995 Korean journal of crop science Vol.40 No.2

벼 품종의 내냉성정도를 판정하는데 기준이 되는 몇가지 형질들에 대하여 품종형에 따른 저온반응의 차이를 구명하고자 오대벼외 187개 품종을 공시하여 실험을 수행한 바 그 결과를 요약하면 다음과 같다. 1. 각 품종형에 따라 대부분의 형질에서 서로 상이하면서 다양한 변이를 나타내었는데, 자포니카형 과 인디카형 에서 는 냉해에 강한 품종이 많은 반면, 통일형 품종은 대부분의 형질에서약한 반응을 나타냈다. 2. 적고현상은 대부분의 자포니카형 품종에서 강한 쪽으로, 통일형 품종은 약한 쪽으로, 그리고 인디카형 품종은 강한 것에서 약한 것까지다앙한 변이분포를 나타냈다. 3. 공시한 품종들간에 증감의 차이가 가장 적게 나타난 형질은 수수와 영화수였으며, 특히 가수는 품종형에 관계없이 188개 품종 중 34개 품종이 냉수구에서 오히려 증가되었다. 4. 출수의 지연, 간장의 단축, 이삭추출도 불량 및 억책율 저하 등에서 통일형 품종은 대부분 그 정도가 심한 반면, 자포니카형 품종과 인디카형 품종에서는 공히 저온반응이 강한 것에서 약한 품종까지 광범위한 변이분포를 나타냈다. This study was conducted to know how low temperature response of rice varieties is available for breeding lines adapted to cold weather. Some agronomic characters related to cold tolerance were evaluated for 188 varieties including three varietal types of Japonica, Tongil, and Indica. Cold tolerance of Japonica and Indica type varieties varied in leaf discoloration, heading delay, reduction of culm length, panicle number, spikelet number, panicle exsertion, spikelet fertility, and phenotypic acceptability at maturity, while Tongil type varieties were susceptible in most agronomic characters. In leaf discoloration, most Japonica type varieties were highly tolerant, while Indica type varieties showed various responses from tolerant to susceptibility. Not significant difference among three varietal types was observed on reduction of panicle number and spikelet number due to low temperature.

냉수처리답에서의 벼 품종형에 따른 각 형질의 저온반응

예종두 한국작물학회 1994 한국작물학회 학술발표대회 논문집 Vol.1994 No.1

냉수처리답에서 벼의 출수일수, 영화수 및 임실률의 유전

芮鍾斗 韓國作物學會 1996 Korean journal of crop science Vol.41 No.1

냉수처리답에서 출수까지 일수, 영화수 및 임실률 등 각 형질에서 내냉성이 강한 품종과 약한 품종을 교배하고, 그 후대에서 각 형질의 유전분석을 실시하였던 바, 그 결과를 요약하면 다음과 같다. 1. 냉수답에서 F1 세대와 F2 집단의 출수까지 일수는 출수가 빠른 쪽이, 영화수는 많은 쪽이 그리고 임실율은 높은 친 쪽으로 완전우성을 나타냈다. 2. 냉수답에서 각 형질의 유전력은 형질 및 교배조합에 따라 다소 차이는 있으나 대체로 높았으며, 자연답보다는 냉수답에서 유전력이 월등히 높은 형질은 임실률이었고, 영화수와 출수일수는 양조건 상호간에 유전력의 차이가 적게 나타났다. 3. 각 형질의 잡종강세정도는 임실율에서 매우 높았으나, 출수일수와 영화수에서는 대체로 낮게 나타났다. 특히 인디카/통일형품종 또는 통일형/통일형품종의 교배조합에서, ?고 자연답보다는 냉수처리답에서 각 형질의 잡종강세정도가 높게 나타났다. This study was conducted to know how cold tolerance of rice is inherited. Several crosses were made between cold tolerant and susceptible varieties, and their progenies were evaluated for days to heading, spikelet number per panicle and spikelet fertility under both cold water and natural conditions. In F1 and F2 generations, earlier heading, more number of spikelet per panicle and higher spikelet fertility under the cold condition were dominance, and less delay or reduction in heading days and spikelets per panicle by cold treatment were over dominance or partial dominance, while less reduction in spikelet fertility by cold-water irrigation was complete dominance. Heritability in most characters by cold treatment was high and there was less difference of heritabilities in heading days and spikelets per panicle between cold treatment and natural conditions, while there was much difference of heritability in spikelet fertility between two conditions. Heterosis in spikelet fertility was considerably high, while those in heading days and spikelets per panicle were relatively low. Heterosis in remote crosses was especially larger under the cold-water treatment condition compare with that under natural condition.

냉수처리답에서 벼 내냉성 관련형질의 유전

芮鍾斗 韓國作物學會 1995 Korean journal of crop science Vol.40 No.4

냉수처리답에서 적고현상, 간장, 수장 그리고 수수 등 각 형질에 대하여 내냉성이 강한 품종과 약한 품종을 교배하고, 그 후대에 대하여 각 형질의 유전분석을 실시하였던 바, 그 결과를 요약하면 다음과 같다. 1. 적고현상에 대하여 강한 품종과 약한 품종의 교배조합에서 강한 개체와 약한 개체의 F2 의 분리비가 7개 조합 중 4개 조합에서 저항성 쪽이 우성으로 3 : 1의 단성잡종분리비를 나타냈다. 2. F1 세대와 F2 집단에서 간장과 수장은 긴 쪽이 우성이고, 단축이 적게 되는 쪽으로 초우성 또는 불완전우성을 나타냈고, 수수는 많은 쪽이 우성이고, 냉수처리하에서 수수가 오히려 많아지는 쪽으로 초우성을 나타냈다. 3. 냉수답에서 간장, 수장 및 수수의 유전력은 형질 및 교배조합에 따라 다소 차이는 있으나 대체로 높았으며, 자연답보다는 냉수처리답에서 유전력이 높게 나타났다. 4. 각 형질의 잡종강세정도는 간장에서 매우 높았으며, 수장과 수수에서는 대체로 낮게 나타났다. 특히 인디카 /통일형품종의 교배조합에서, 자연답보다는 냉수처리답에서 잡종강세가 높게 나타났다. This study was conducted to know how cold tolerance of rice varieties is inherited. Several crosses were made between cold tolerant varieties and susceptible varieties, and their progenies were morphologically and physiologically evaluated each characters at cold water and natural conditions. The segregation modes of leaf discoloration by cold treatment in F2 generations are agreed to simple inheritance ratio of R3 : Sl in four crosses among total seven cross combinations. In F1 and F2 generations, tall one was dominance in culm and panicle length and less reduction in culm and panicle length by cold treatment was overdominance or partial dominance, while more number of panicles per plant was dominance and more increasing of panicle numbers by cold water irrigation was overdominance. Heritability and heterosis in most characters showed high values, and heterosis in remote crosses was especially larger under the cold water treatment condition compare with that under natural condition.

氣象要素에 의한 벼 蒸發散量 豫測

芮鍾斗,權純國 서울大學校 農科大學 1985 서울대농학연구지 Vol.10 No.1

Evapotranspiration (ETP) rate is one of the most important factors required in the determination of water requirement in the paddy field. The knowledge of water requirement serves as a base for irrigation planning as well as water management and hence the importance of a study for accurate estimation of ETP rate can not be over emphasized. This study was intended to suggest a method for accurate estimation of ETP rate in paddy field. Field measurements of ETP were taken for a period of 3 years and the data were analysed using the climatic data for the same period to verify the effects of climatic factors on ETP rate in paddy fields. A model for the estimation of ETP that uses the climatic data as an input was developed. From the fact that ETP rate and pan evaporation (EV) are both affected by similar factors, a method of estimating ETP using pan EV data was considered. The ETP coefficients (ETP/EV) for each year were analysed and compared for consistency. The results are summarized as follows : 1. The differences of the ETP rates between rice varieties were not significant. However, the differences in the ETP rates between the years were significant and these are explained by the differences of the climatic conditions for the different years. 2. The maximum 10-day ETP rates for 1982, 1983 and 1984 occurred in early August, middle August and early August respectively at a mean rate of 8.5mm/day. These maximum 10-day ETP periods concurred with the periods of maximum mean temperature and solar radiaton for each year. 3. The results of the regressional analysis of climatic factors and ETP rates shows that there is a high significant relation between the measured ETP rates on the one hand and mean temperature, solar radiation and relative humidity values on the other hand. 4. From the results of the regressional analysis of the 3 years' data of ETP on the one hand and mean temperature, solar radiation and relative humidity on the other hand, a model for estimating ETP was derived and is as given below. ETP = 0.168(AT/10)??(ST/100)??(RH/100)?? 5. The analysis and comparison of the ETP coefficient for each year gave the coefficient of variation of 16.65% and 17.09% for the small and large pans respectively. These values are relatively high and hence it was concluded that there was a little consistency of ETP coefficients from year to year.