http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Optimization of Temperature Regime to Screen Cold Tolerant Rice Seedlings
( Ung Jo Hyun ),( Sang Min Yeo ),( Sang Bok Lee ),( Jeong Heui Lee ),( Jong Min Jeong ),( Yeaul Kyu Seong ),( Dae Ha Seo ),( Yong Jae Won ),( Eok Keun Ahn ),( Jeom Ho Lee ),( Jun Cheol Mun ),( Cheol S 한국육종학회 2016 Plant Breeding and Biotechnology Vol.4 No.2
Low temperature stress at the seedling stage of rice is an important factor causing the leaf discoloration, wilting and consequently leads to non-uniform crop maturation. In order to screen the cold tolerance elite lines efficiently, the five cold treatment conditions with different water and air temperature were designed and treated at seedling stage. For the evaluation of seedling tolerance, the injury was scored by visual rate and measured by Soil and Plant Analyzer Development (SPAD) meter. In the reactions of varieties for each treatment, the treatment ``B`` condition, 12℃ mean water with 24℃ mean air, shows clear discoloration, so it`s correlation coefficient was highest (r=-0.9, P<0.0001) among the treatments. In the treatment condition for screening the cold-tolerance elite line, the cultivar, treatment and their interaction significantly affect the SPAD value. The ``A`` treatment, 12℃ mean water with 34℃ mean air, was the best way to observe the variation between the elite lines. On the basis of the Duncan`s test for SPAD value of cultivars, Keumo (moderate tolerant), Saetbyeol (sensitive) and Seolak (tolerant) were selected as check varieties. To study its impacts at the paddy field, the changes of crop characteristics such as height, panicle length, number of tiller and heading were investigated. In later growth period, the seedling treatment impact at the paddy field leads to heading delay. Due to the low temperature stress at the seedling stage induced by 12℃ mean cold water, Japonica and Tongil group shows the heading delay 4 to 7 and 8 to 11 days respectively.
현웅조(Ung-Jo Hyun),이정희(Jeong-Heui Lee),정응기(Eung-Gi Jeong),장재기(Jae-Ki Chang),정국현(Kuk-Hyun Jung),조영찬(Young-Chan Cho),이점호(Jeom-Ho Lee),원용재(Yong-Jae Won),서정필(Jung-Pil Suh),안억근(Eok-Keun Ahn),정종민(Jong-Min Jeo 한국육종학회 2019 한국육종학회지 Vol.51 No.4
‘Jinhan’, a japonica rice variety, was developed from a cross between ‘Cheolwon68’ (IT218244) and ‘Junghwabyeo’ (IT260473) by the rice breeding team at National Institute of Crop Science in 2015. ‘Cheolwon68’ is early maturing and resistant to blast disease, and ‘Junghwabyeo’ is a cold-tolerant and high-quality variety. The growth duration of ‘Jinhan’ in the paddy field was 116 days in the Northern Central Highland in Korea, which was similar to that of ‘Jinbu’. The culm length of ‘Jinhan’ was 61 cm, which was 10 cm shorter than that of ‘Jinbu’. The panicle of ‘Jinhan’ was composed of 66 spikelets. The viviparous germination rate of ‘Jinhan’ was 33.2%. ‘Jinhan’ showed resistance to blast disease, but was susceptible to stripe virus, dwarf and black-streaked dwarf viruses, and plant hoppers. The milled rice grains of ‘Jinhan’ showed an excellent palatability index (0.23) and lower protein content (5.7%) than that of ‘Jinbu’. The grain milling characteristics of ‘Jinhan’ were similar to those of ‘Jinbu’. ‘Jinhan’ showed a milled rice productivity of 5.43 MT/ha at four sites cultivated in the Northern Central Highland(Registration No. 7318).
현웅조(Ung-Jo Hyun),원용재(Yong-Jae Won),정응기(Eung-Gi Jeong),안억근(Eok-Keun Ahn),이정희(Jeong-Heui Lee),정국현(Kuk-Hyun Jung),박향미(Hyang-Mi Park),전용희(Yong-Hee Jeon),곽지은(Jieun Kwak),성낙식(Nak-Sig Sung),김정천(Jeong-Cheon K 한국육종학회 2021 한국육종학회지 Vol.53 No.2
Alchanmi’, a japonica rice variety, was developed from a cross between ‘Junam’ and ‘Chilbo’ by a rice breeding team at the NationalInstitute of Crop Science and Icheon, Agricultural Technology Center in 2018. The heading date of ‘Alchanmi’ was August 10 in the middleplain area-two days later than that of ‘Hwaseong’. ‘Alchanmi’ had a culm length of 69 cm, 16 cm shorter than that of ‘Hwaseong’, and 103spikelets per panicle. The viviparous germination rate of ‘Alchanmi’ was 24.4%. It showed resistance to blast, bacterial blight (K1, K2, K3race), and stripe virus, but was susceptible to the K3a race of bacterial blight, dwarf and black streak dwarf viruses, and plant hoppers. Themilled rice of this variety exhibited a translucent and medium short grain shape. The cooked rice grains of ‘Alchanmi’ had an excellent palatabilityindex (0.7) and showed lower amylose content (18.6%) than that of ‘Hwaseong’. The grain milling characteristics of ‘Alchanmi’ were betterthan those of ‘Hwaseong’, especially the head rice milling recovery ratio and head rice ratio (96.2%). ‘Alchanmi’ showed 5.83 MT/ha of milledrice productivity at 6 sites under ordinary cultivation (Registration No. 8132).
Identification of quantitative trait loci related to grain filling under low temperature condition
Jong-Min Jeong,Ung-Jo Hyun,Ji-Ung Jeung,Kyung-Ho Kang,Young-Chan Cho,Bo-Kyeong Kim 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Low temperature is a major abiotic stress that adversely affects rice production in rice cultivation regions of the world. Low temperature during the rice growing season, can inhibit growth and development at any development stage, from germination to grain filling. Among the rice growth stage, reproductive stage was known as the most sensitive to low temperature, causing sterile grain and lead yield loss. However, low temperature during the grain filling stage also, may cause delay and incomplete grain maturation. In this study QTL analysis were performed to identify the QTLs associated with percent of grain filling under low temperature condition during the grain filling stage. A 139 RIL derived from a cross between ‘Milyang23’ (Tong-il, cold susceptible) and ‘Gihobyeo’(Japonica, cold tolerance) were exposed to air and water of 17℃ at the same time for 14 days during the grain filling stage. One significant QTL associated to percent of grain filling was detected on chromosome 7. This QTL could explain 14.7% of the phenotypic variance for percent of grain filling. We have the plan to confirm the detected QTL through further study.
배현정(Hyun-Jung BAE),최웅용(Ung-Yong CHOI),조승제(Seung-Je JO) 조선대학교 지식경영연구원 2009 기업과 혁신연구 Vol.2 No.2
본 연구는 IMF 외환위기 이후인 1999년부터 2005년까지 상장기업을 대상으로 소유와 경영의 분리에 따라 파생된 경영자의 유형과 기업의 경제적 부가가치(EVA)의 관련성을 분석하였다. 주요독립변수인 경영자 유형변수는 기존 선행연구들에서 활용한 변수에 현실성을 감안하여 공시되고 있는 기업 경영자의 성명이 기업의 최대주주 및 특수관계인 명단에 포함여부를 기준으로 포함되는 경우에는 소유경영자 기업으로, 포함되지 않은 경우에는 전문경영자 기업으로 간주하였다. 종속변수는 기업의 경제적 부가가치(EVA)로 변수 산출의 객관성을 확보하고자 KIS-VALUE П에서 제공한 자료를 사용하였다. 주요 분석결과는 다음과 같다. 첫째, (t)기에서 (t+3)기까지 경제적 부가가치인 EVA는 전문경영자 기엽에서의 평균이 소유경영자 기업의 평균보다 높았으며, 통계적으로도 유의한 결과를 도출하였다. 아울러 기타 변수인 자기자본이익률(ROE)과 자본집약도(TWC), 기업규모(SIZE)변수도 전문경영자 기업에서의 평균이 소유경영자 기업의 평균값보다 높았으며, 자본집약도(TWC)를 제외하고는 통계적 유의성을 검증하였다. 둘째, 경영자 유형 더미변수(CEO<SUP>DM</SUP>)는 종속변수인 경제적 부가가치(EVA(t), (t+1)기, (t+2)기, (t+3)기)와 통계적으로 유의한 양(+)의 관련성을 나타냈다. 이러한 결과는 전문경영자 기업일수록 기업의 EVA가 높음을 의미한다. Using the firms listed in the Korea Stock Exchange between 1999 and 2005, We have examined the effects of the CEO Types on Economic Value Added. The main independent variable is CEO type. The dependent variable is EVA. Also, In order to ensure the objectivity of data used KIS-VALUE П. The main results of this study can be summed up as follows: (1) From (t) until (t+3) eva average of the professional manager enterprise were higher the owner manager enterprise and the statistical significance was verified. And average of the return on equity (ROE), total workers per capital (TWC), enterprise size (SIZE) are from the professional manager enterprise were higher mean value of the owner manager enterprise. But, excepted TWC and verified a statistical consideration characteristic (2) we find that positive correlation between CEODM and EVA (t), (t+1), (t+2), (t+3). These results imply that the professional manager improves EVA.