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Effect of In Vivo Embryo Production and Embryo Transfer Following Superovulation in Hanwoo
Sang-Rae Cho,Sun-Ho Choi,ChangYong Choe,Jun-Kyu Son,Soo-Ho Choi,Young-joo Kim,Poongyeon Lee,Yeoung-Gyu Ko,Sung-Heum Yeon,Jin-Woo Jung,Sung-Jae Kim,Yeon-Sub Jung,Nan-Hee Bok,Hyun-Jong Kim,Dong-Soo Son 한국동물생명공학회(구 한국동물번식학회) 2010 발생공학 국제심포지엄 및 학술대회 Vol.2010 No.1
Muhammad J. Jaskani,Sung Whan Kwon,Eun Ju Kim,Bok Rae Ko 한국원예학회 2004 Horticulture, Environment, and Biotechnology Vol.45 No.5
Tetraploids are used as breeding parents in triploid watermelon seed production programs. Colchicineinduced tetraploids were compared with diploids for their fruit characteristics, seed morphology, and germination. Tetraploids had thicker fruit rind thickness (17.6 ㎜) but less number of seeds/fruit (31.3) than diploids. Tetraploid seeds were shown increased length (9.1 ㎜), width (6.3 ㎜) and thickness (2.8 ㎜). Moreover, the seed coat of tetraploids had fissures along the longitudinal axis. Diploid seeds showed almost completely filled cavity whereas tetraploids produced weak embryos, showed some empty cavity and lower seed germination than diploids. Among different seed germination treatments, seed coat removal and seed nicking at radicle end showed high germination rates (84.3 and 77.1%, respectively). Adherence of thick seedcoat to cotyledons in tetraploid seeds was reduced by planting seeds in pots with the radicle end up at 90° angle. Increased size of cotyledons and leaves in tetraploid seedlings than diploids was also recorded.
흑색필름 골피복 및 아인산 관주가 노지수박 역병 발생 경감에 미치는 영향
노재종(Jae Jong Noh),김웅(Woong Kim),이기권(Ki Kwon Lee),소순영(Soon Young So),고복래(Bok Rae Ko),김대향(Dae Hyang Kim) 한국원예학회 2007 원예과학기술지 Vol.25 No.1
본 시험은 노지수박 재배시 발생하는 역병의 방제가능성을 조사하기 위하여 수행하였다. 시험포장에서 역병은 6월 29일 발병이 시작되었으며, 약제의 경엽살포와 아인산의 지제부 및 착과부 관주에 대한 효과보다는 골피복의 효과가 크게 나타났다. 초기발병률은 처리간 어떤 경향을 보기 어려웠으나 병의 진전도를 볼 때 골피복을 처리한 구들에서 병의 진전이 늦었으며, 수확기에 기타 처리에서 병의 발생이 급격히 진전되었고 무처리구에 7월 20일 조사시 100% 발병되었다. 역병균 밀도와 이병주율과의 회귀식은 [이병주율(%)=40.17+5.07×역병균밀도(r²=0.552<SUP>**</SUP>)]이며, 역병균 밀도와 이병과율과의 회귀식은 [이병과율(%)=31.24+5.15×역병균밀도(r²=0.566<SUP>**</SUP>)]이며, 이병주율과 이병과율과의 회귀식은 [이병과율(%)=-3.30+0.90×이병주율(r²=0.943<SUP>**</SUP>)]이었는데 이는 덩굴에 역병이 발생하면 과실까지 역병균이 이동하여 과실까지도 침해한다는 결과를 보여주는 것이라 생각된다. The experiment was carried out to investigate the possibility in control of Phytophthora root and fruit rot (Phytophthora capsici) in field-grown watermelon during summer season. The disease started to occur in 29 June in the experiment field. To investigate which method was more effective against the disease, four methods, such as fungicide application, furrow mulching with P.E. black film, and dripping of phosphorus acid at root area and fruit setting area, were combined. They did not show any difference in the early stage. When harvest season was coming, the incidence was developed rapidly and reached to 100% and other treatments couldn’t reduce the disease incidence very much, but furrow mulching with black film influenced the reduction of the disease significantly. Regression equations between the pathogen density and the diseased vine rate, the pathogen density and the diseased fruit rate, and the diseased plant rate and the diseased fruit rate were [diseased vine rate (%) = 40.17 + 5.07 × pathogen density (r²=0.552<SUP>**</SUP>)], [diseased fruit rate (%) = 31.24 + 5.15 × pathogen density (r²=0.566<SUP>**</SUP>)], and [diseased fruit (%) = -3.30 + 0.90 × diseased vine rate (r²=0.943<SUP>**</SUP>)], respectively. This result indicated that fruit infection would be influenced much more by infected vine rather than by pathogen density in soil.
Effects of Desalinization Management on Rice Yield in Sea Water Flooded Field
Kim, Sang-Su,Yang, Won-Ha,Choi, Weon-Young,Park, Hong-Kyu,Choi, Min-Gyu,Back, Nam-Hyun,Kang, Si-Yong,Shin, Hyun-Tak,Cho, Soo-Yeon,Kwon, Seog-Ju,Ko, Bok-Rae The Korean Society of Crop Science 1999 한국작물학회지 Vol.44 No.1
Over 2,000 ha of rice fields in the western and southern coastal region of Korea were flooded with sea water during the spring tide, on August 19-21, 1997, and the rice plant at heading stage was injured. The field surveys were undertaken at the sea water flooded paddy fields in Chonbuk Province, to identify the injury symptoms and rice yield damage subjected to different flooding condition and desalinization methods. Five days after sea water flooding at heading stage, the flag leaves of rice plants flooded with 30 ㎝ deep sea water withered from the tip, the withering progressed to the lower leaves in deeper flooding. The spikelets were spotted black and discolored from the tip at 50 ㎝ deep flooded rice, and some panicles changed to white at 80 ㎝ deep flooded rice. Most of the rice leaves submerged completely for an hour were withered and most of panicles changed to white. The milled rice yield, percentage of ripened grain, and 1000 grain weight of flooded rice decreased with deeper flooding water, higher water salinity and longer flooding time. Even under the same flooding conditions, the damage of rice yield varied with the growth stage: heading stage>dough stage>booting stage. Rice yield damage was less in the fields on the upper riverside than those of the fields on the estuary and seaside, because of lower water salinity. In a flooded field, the rice yield damages were reduced as the distance increased from the levees where the sea water inflowed and increased as the distance increased from the fresh water irrigation gate. The desalinization treatments consisting of frequent exchange of irrigation water and spraying with fresh water soon after flooding effectively reduced the rice yield damage.
Effects of Desalinization Management on Rice Yield in Sea Water Flooded Field
Sang-Su Kim,Won-Ha Yang,Weon-Young Choi,Hong-Kyu Park,Min-Gyu Choi,Nam-Hyun Back,Si-Yong Kang,Hyun-Tak Shin,Soo-Yeon Cho,Seog-Ju Kwon,Bok-Rae Ko 韓國作物學會 1999 Korean journal of crop science Vol.44 No.1
Over 2,000 ha of rice fields in the western and southern coastal region of Korea were flooded with sea water during the spring tide, on August 19-21, 1997, and the rice plant at heading stage was injured. The field surveys were undertaken at the sea water flooded paddy fields in Chonbuk Province, to identify the injury symptoms and rice yield damage subjected to different flooding condition and desalinization methods. Five days after sea water flooding at heading stage, the flag leaves of rice plants flooded with 30 ㎝ deep sea water withered from the tip, the withering progressed to the lower leaves in deeper flooding. The spikelets were spotted black and discolored from the tip at 50 ㎝ deep flooded rice, and some panicles changed to white at 80 ㎝ deep flooded rice. Most of the rice leaves submerged completely for an hour were withered and most of panicles changed to white. The milled rice yield, percentage of ripened grain, and 1000 grain weight of flooded rice decreased with deeper flooding water, higher water salinity and longer flooding time. Even under the same flooding conditions, the damage of rice yield varied with the growth stage: heading stage>dough stage>booting stage. Rice yield damage was less in the fields on the upper riverside than those of the fields on the estuary and seaside, because of lower water salinity. In a flooded field, the rice yield damages were reduced as the distance increased from the levees where the sea water inflowed and increased as the distance increased from the fresh water irrigation gate. The desalinization treatments consisting of frequent exchange of irrigation water and spraying with fresh water soon after flooding effectively reduced the rice yield damage.