選拔指數에 依한 水稻品種의 選拔

崔鳳鎬,鄭根植 충남대학교 농업과학연구소 1979 農業技術硏究報告 Vol.6 No.1

Selection index methods were applied to selecting better performing rice varieties with better plant characters from rice yielding trials tested under six different cultural methods. The results obtained were summarized a follows: 1. Varieties such as No. 3, 4, 5 and 6 were selected as best performing varieties with good plant and grain characters. 2. Selection index Ⅰ computed from Hazel's method was appeared effectivefor selecting rice varieties grown under general optimum environmental conditions, while selection index Ⅱ computed from Pesek and Baker's desired genetic gain were effectivefor selecting rice varieties grown under rather stressed conditions. 3. The rank of mean yield of each variety was not completely in agreement with that of index values, which indicates the importance of other characters besides yield in selecting varieties. 4. Most characters studied were high in broad sense of heritabilities. 5. No significant interaction was found between varieties and cultural methods.

남부 중간지 자운영재배답에서 벼재배시 논 유형에 따른 질소시비량 구명

윤봉기,김병호,김희권,이인,최형국,박인진 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.1

중간지의 보통답과 사질답에서 녹비작물인 자운영을 재배한 논에 벼를 재배할 때 답 유형에 따른 질소비료 시용량을 구명하고자 전남 구례의 보통답과 사질답에서 관행, 자운영+질소 70%, 자운영+질소 50%, 자운영+질소 30%, 자운영+무질소의 5처리로 2000년부터 2년동안 시험한 결과는 다음과 같다. 1. 자운영의 개화성기 생육은 초장 44.1∼44.2㎝, 생초중 20.1∼22.5Mg ㏊^-1이였으며 무기성분 함량은 T-N 2.46∼2.68%, P_2O_5 0.56∼0.60%, K_2O 2.05∼2.18%였다. 사질답에 비하여 보통답에서 자운영의 생초중이 많았다. 2. 토양중 NH_4-N함량의 경시적 변화는 이앙 후 7일에 21.5∼48.3㎎ ㎏^-1으로 가장 높았으며 이앙후 70일에 7.0∼9.7㎎ ㎏^-1으로 점차 감소하였는데 처리에 따라서는 자운영+질소 70%, 자운영+질소 50%시용구에서 높았다. 3. 벼 수확기의 간장 76∼85㎝, 수장 17.9∼19.2㎝로 사질답이 보통답에 비하여 간장, 수장이 컸다. 4. 시험후 토양의 화학성은 pH 5.4∼5.8, OM 21.5∼24.4g ㎏^-1, CEC 9.2∼10.9cmol ㎏^-1, Ava. P_2O_5 141∼360㎎ ㎏^-1으로 자운영처리구에서 OM, CEC함량이 증가하였다. 5. 벼의 수량은 관행(보통답 5.03Mg ㏊^-1, 사질답 5.18Mg ㏊^-1)에 비하여 보통답의 자운영+질소 70%, 50%시용구에서 각각 5, 4%증수되었고, 사질답에서는 자운영+질소 70%, 50%시용구에서 각각 7, 4%증수되었다. 6. 남부 중간지에서 자운영을 재배하여 생초 20Mg ㏊^-1를 녹비로 투입하면 벼를 재배시 질소 시용 적정량은 보통답, 사질답 모두 관행 시비량의 50%이였다. This study was conducted to find out fertilizer recommendation rates for rice at a normal and sandy paddy field after planting milk vetch(MV) in Guryae which lies to southern medium altitude region from 100m to 250m above sea level from 2000 to 2001. The amount of N fertilizer were 110(normal paddy) and 130(sandy paddy) ㎏ ㏊^-1 at control and 0, 30, 50, 70% of the control. At flowering stage of milk vetch, the content of T-N, P_2O_5, K_2O in plant were 2.46∼2.68%, 0.56∼0.60%, 2.05∼2.18%, respectively. Plant height were 44.1∼44.2㎝. Fresh weight were 20.1∼22.5Mg ㏊^-1. Fresh weight of milk vetch cultivated in normal paddy field was more than that in sandy paddy field. The content of NH_4-N in soil was 21.5∼48.3㎎ ㎏^-1 at 7 days after planting and 7.0∼9.7㎎ ㎏^-1 at 70 days after planting. Content of NH_4-N in soil was increased at the treatments of milk vetch + N 70, 50% of control. Culm length was 76∼85㎝, panicle length was 17.9∼19.1㎝ at harvesting stage. Culm length and panicle length at sandy paddy field were longer than those of normal paddy field. Chemical properties of soil after experiment were pH 5.4∼5.8, OM 15.6∼21.5g ㎏^-1, CEC 9.2∼10.9cmol ㎏^-1, Ava. P_2O_5 141∼360㎎㎏^-1, respectively. The content of OM, CEC in soil applied milk vetch at normal paddy field was higher than those of the control, and the content of CEC in soil applied milk vetch at sandy paddy field was higher than that of the control. When milk vetch was cut at flowing stage, rice yield of milk vetch + N 70, 50% of control plot were increased 5, 4% more than that of control(5.03Mg ㏊^-1) at normal paddy field. Rice yield vetch+N 70, 50 of control were increased 7, 4% more than that of control(5.18Mg ㏊^-1) at sandy paddy field. Nitrogen application rate of normal and sandy paddy field was 50% of conventional fertilization rate when 20Mg ㏊^-1 milk vetch cultivated paddy field was inputed for rice culture in the southern medium altitude.

分蘖型 옥수수에 있어서 Source와 Sink의 關係

李喜鳳,崔鳳鎬,李元九,池熺正 충남대학교 농업과학연구소 1993 농업과학연구 Vol.20 No.2

This study was carried out to understand the relationship between sources and sinks in tillering maize hybrid. A non-tillering hybrid was included as check hybrid, The following treatments were imposed on the two hybrids at tasseling stages 1) no leaves removed, 2) all leaves removed, 3) leaves above 1st ear node removed, 4) leaves below 1st ear node removed and 5) only 1st ear removed. The experiment was arranged in a split plot with hybrids as main plots and treatments as sub plots. Results obtained were summarized as follows: Plant heights in control were significantly higher in both hybrids than other treatments, No significant differences of plant height were observed among treatments of leaf' removal in both hybrids, No significant differences of kernel weights of plant were found between locations of leaf removal, But seed weight of tillering hybrids was about 10 to 15% heavier than that of non-tillering hybrid. Stem weight showed the same tendency as the kernel weights. Leaf removal above the ear node lowered kernel weight significantly up to 60% compared with no leaf removal, The leaf removal below the ear node lowered the kernel weight about 40%. The effects of leaf removal on kernel weight was more serious in the non-tillering hybrid than in the tillering hybrid. Contribution of each part to the total dry matter varied with position of leaf removal, When no leaves were removed. contribution of each part to the total dry matter was great in the order of kernel weight. leaf weight and culm weight, When leaves above the ear node were removed, the contribution of each part to the total dry matter was in the order of culm weight. leaf weight and kernel weight. When leaves below the ear node were removed. the contribution of kernel weight was greater than the contribution of leaf and culm weights.

남부 평야지 자운영재배답에서 논유형과 질소수준이 벼 생육 및 토양 화학성에 미치는 영향

윤봉기,김병호,이인,최형국,박인진,김용웅 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.3

녹비작물로서 자운영을 재배한 논에 벼를 재배할 때 질소비료의 절감기준을 구명하고자 평야지인 전남 나주의 보통답과 사질답에서 관행, 자운영+질소 70%, 자운영+질소 50%, 자운영+질소 30%, 자운영+무질소의 5처리로 1999년부터 2001년까지 3년동안 시험한 결과는 다음과 같다. 1. 자운영의 개화성기 생육은 초장 43.6~43.9㎝, 생초중 21.79~24.99Mg ha^(-1)이였으며 무기성분 함량은 T-N 2.40~2.64%, P₂O_(5) 0.42~0.46%, K₂O 1.83~2.01%였다. 자운영의 생육은 보통답이 사질답에 비하여 생초중이 많았고 T-N, T-C, P₂O_(5), CaO, MgO의 함량도 높았다. 2. 토양중 NH₄-N함량의 경시적 변화는 이앙후 7일에 20.7~47.4㎎ kg^(-1)으로 점차 감소하였는데 처리에 따라서는 자운영+질소 70%, 자운영+질소 50% 시용구에서 높았다. 3. 벼의 생육은 사질답이 보통답에 비하여 초장 및 간장이 크고 ㎡당경수가 많았고 처리에 따라서는 자운영+질소 50%, 자운영+질소 30%시용구에서 생육이 좋았다. 식물체중의 T-N, P₂O_(5), K₂O함량도 자운영+질소 70%, 자운영+질소 50%시용구에서 많은 편이었다. 4. 시험후 토양의 화학성은 관행에 비하여 보통답의 자운영 시용구에서 OM, CEC, Ava, P₂O_(5)함량이 증가하였고 사질답에서는 CEC가 증가하였다. 5. 벼의 수량은 관행(보통답 5.15Mg ha^(-1), 사질답 5.16Mg ha^(-1))에 비하여 보통답에서는 자운영+질소 70%, 50%, 30%시용구에서 각각 3, 6, 4% 증수되었고, 사질답에서는 자운영+질소 70%, 50%시용구에서 각각 3, 5%증수되었다. 6. 남부 평야지에서 자운영을 재배하여 생초 20Mg ha^(-1)를 녹비로 투입하면 벼를 재배시 질수시용 적정량을 보통답에서는 관행시비량의 30%, 사질답에서는 관행시비량의 50%이였다. This study was conducted to find out an amount of N fertilizer for rice culture followed after milk vetch(MV) cultivated at normal and sandy paddy field in Naju which lies to southern plain region from 1999 to 2001. The amounts of N fertilizer were 110(normal paddy) and 130(sandy paddy)㎏ ha^(-1) at control and 0, 30, 50, 70% of control. At flowering stage of MV, Plant height was 43.6~43.9㎝ and fresh weight was more than that of sandy paddy field. Also, the contents of T-N, T-C, P₂O_(5), CaO, MgO in MV plant cultivated normal paddy field were higher than those of sandy paddy field. Content of NH₄-N in soil was 20.7~47.4㎎ ㎏^(-1) at 7days after transplanting and 6.1~8.1㎎ ㎏^(-1) at 70days after transplanting of rice plant. Content of NH₄-N in soil was high at the treatments of MV+N50% and MV+N70%. Rice plant height, culm length and the number of tiller per ㎡ in sandy paddy field were higher than those of normal paddy field. Growth of rice plant in MV+N70% and MV+N50% was higher than that in others. And the content of T-N, P₂O_(5) and K₂O of rice plant in MV+N70% and MV+N50% were higher than those in others. Chemical properties of soil after experiment were pH 5.1~5.9, OM 15.6~20.9g ㎏^(-1). CEC 10.1~13.8cmol ㎏^(-1) and Ava. P₂O_(5) 152~244㎎ ㎏^(-1). The contents of OM. CEC and Ava. P₂O_(5) in soil applied MV at normal paddy field were higher than those of the control, and the content of CEC in soil applied MV at flowering stage, rice yields of MV+N70%, 50%, MV+N30% were increased 3, 6, 4% more than that of control (5.15Mg ha^(-1)) at normal paddy field. Rice yields of MV+N70%, MV+N50% were increased 3, 5% higher than that of control(5.16Mg ha^(-1)) at sandy paddy field. Nitrogen application rate of normal paddy field was 30%, and sandy paddy field was 50% of conventional fertilization rate when 20Mg ha^(-1) MV cultivated paddy field was inputed for rice culture in the southern plains.

편도절제술을 받는 소아에서 수술 후 오심 및 구토에 대한 Propofol과 Ondansetron의 예방적 효과

김영재,구봉근,이정한,이근무,정순호,최영균,신치만 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Objective: To examine the prophylactic effect of ondansetron and propofol against postoperative nausea and vomiting(PONV) in children undergoing tonsill ectomy Methods and Materials: Sixty children(aged 3-11 years) who underwent tonsillectomy received antiemetics (ondansetron group; ondansetron 0.1mg/kg, propofol group; propofol 0.5mg/kg) or not (control group) at the end of surgery. Anesthesia was induced with ketamine(1mg/kgiv) and rocuronium(0.5mg/kg) and maintained by inhalation anesthesia with 2-3vol% sevoflurane in 50% N_(2)O/O_(2). Premedication was given as atropine 0.01mg/kg iv. Ketorolac(1mg/kg) was injected for postoperative analgesia immediate after induction. They were monitored the incidence of PONV at operation room, postanesthetic care unit(PACU) and admission room. Results: No significant differences were observed in the total incidence of PONV among the groups. But ondansetron and propofol group made a difference(p<0.05) in the incidence of PONV at operation room compared with control group. Conclusion: In children undergoing tonsillectomy, ondansetron(0.1mg/kg) and propofol(0.5mg/kg) may have a prophylactic effect against PONV at operation room.

Characteristics of Tillering maize inbred IK4

Bong Ho Choe(崔鳳鎬)Hee Bong Lee(李喜鳳),Won Koo Lee(李元九),Hee Chung Ji(池熺正),Chong Tae Chung(鄭鍾台),Seung Keun Jong(鄭丞根) 한국육종학회 1994 한국육종학회지 Vol.26 No.4

IK4 inbred line is one of the few maize inbreds developed by authors based on the number of tillers per plant. The objectives of the study were to characterize the IK4 inbred itself and to determine the characteristics of the line when it was crossed with other tillering inbred lines. The IK4 inbred showed tillers taller than the main stem at maturity. Tillering habits of IK4 were showed also in some of the F₁ hybrids. Tillers taller than main stem at maturity assumed to be very effective for increasing kernel yield as well as silage production of tillering maize hybrids.

다얼성 옥수수 연구 3 : 분얼발생의 습성 및 형태

Bong Ho Choe,Hee Bong Lee,Won Koo Lee,Kwon Kyoo Kang,Seung Keun Jong 韓國作物學會 1989 한국작물학회지 Vol.34 No.1

분얼하는 옥수수에서 분얼의 발생시기 발생부위, 개체당분얼수, 분얼각, 근계, 크기등에 대해 조사 보고된 바가 없기에 이들 특성을 알기 위해 국내 재래종에서 순계분리한 자식계통 및 교잡종을 중심으로 1987년과 2988년에 포장조사한 것을 다음과 같이 요약한다. 1. 일차분 시기는 충남의 유성에서 5월 11일경 파종시 주경의 제일본엽이 지하에 출현후 18일 내지 20일이었고, 제일차분얼은 일차분얼이 있은 후 4~5일 후였다. 자식계통들 사이와 교잡종들 사이에는 분얼의 발생시기에 큰 차이가 없었고 교잡종 자식계통보다 2일 정도 빨랐다. 2. 분얼들의 발생부위는 거의 모든 시험계통들이 주경의 지하절에서 였다.(예외 : Tlr 계통) 3. 개체당 분얼수는 재식밀도에 관계없이 계통 및 교잡종에 따라 달랐다. IK나 IRI같은 자식계토은 개체당 분얼수가 2~3개로 정해졌으나 왜성과 같은 계통은 5내지 10개가 되기도 하였다. (IK IRI)F1 은 3~4개였다. 4. 주경과 분얼이 가지는 분얼각도 유전적 특성으로 대략 3개로 구분할 수 있었다. 1군은 분얼각이 없거나 매우 적은 것, 2군은 분얼각이 45º 정도 되는 것, 3군은 분얼각이 45º 이하되는 것들이다. 5. 분얼의 크기(길이, 직경)는 유효경 여부를 결정하는데 중요한데 대부분 재래종 계통이나 이들로 만들어진 교잡종은 60cm 30cm의 재식밀도하에서 유효경 비율이 90% 이상되었다. 6. 분얼의 크기(길이, 직경)는 유효 경 여부를 결정하는데 중요한데 대부분 재래종 계통이나 이들로 만들어진 교잡종은 60cm 30cm의 재식밀도하에서 유효경 비율이 90% 이상되었다.℃처리기간중에는 근의 부위에 관계없이 Rf치가 낮은 쪽에서는 증가하였으나 높은 쪽에서는 상대적으로 감소하였다. 4. 이상의 결과를 종합하여 보면 인삼근에 있어서 신아의 휴면타파 및 맹아는 ABA와는 별로 관계가 없고 온도숙건에 지배되어 나타나는 GA의 생합성 능력과 그 생합성에 의한 활성증가와 밀접한 관계가 있는 것으로 추정된다.는 0.2045, 0.1208, 0.2248로 추정되었다. 산란율과 난중과의 관계는 0.6233, -0.2259, 0.2973, 500일영 체중과는 0.2417, 0.0774, - 0.4787로 추정되었다. 산란지수와 난중과의 관계는 0.6171, -0.2706, 0.4579, 500일영 체중과의 관계 0.3082, -0.0792, -0.3368로 추정하였다. 난중과 500일영 체중과의 관계는 0.2742, 0.2205, 0.1354로 추정되었다.)에서 47.4%의 가장 높은 검색률을 나타내었고 다음 성계(150일영이상)에서 35.3% 및 유추(30 일영미만)에서 17.3%의 순이었다. 이중 세균성 및 기생충성 질병은 육성계에서의 검색률이 가장 높았으나, 바이러스성 질병은 육성계 및 성계에서 거의 같은 비율로 높았으며 곰팡이성 질병은 유추에서 가장 높은 검색률을 나타내었다.17) 사료비절감은 생산비의 60∼70%를 차지하고 있으므로 공동구인 자가배합을 하여 자기실정에 맞는 경영체질로 운영하고 있었다. (18) 인건비가 생산비의 15∼20%의 비율이며 또한 사람 구득난이라 가족노동을 최대한 활용, 관리를 하고 있으며 생력화를 위해 기계화, 자동화되어 가고 있었다. 애정과 정성심있는 관리로 닭을 스트레스를 주지 않게 하기 위해 가족관이, 기계자동화가 중요한 역할을 하고 있었다. (19) 시설기구와 육성상각비를 줄이기 위해 관리자의 변동이 없고, 종신직장으로서 긍지와 In order to investigate developmental habit and morphology of maize tillers, time and location of tiller development. number of tillers per plant, tiller angle, height and diameter of tillers and root systems of tillers were examined under field condition for maize with tillers. Materials used were mostly from Korean local lines and a few lines from other countries were also included for comparison. The time of the first tiller development was about 18 to 20 days after emergence when planted on May in Yusong. The second tiller appeared about 4 to 5 days after the first tiller appeared. The tiller number per plant varied with lines and hybrids and ranged from two to ten. The location of tiller development was usually basal nodes of the main stem. Each tiller appeared to have its own root system. The angle between tillers and main stem was variable depending upon the maizes and the tiller angle could be classified into three categories. The height of tillers was also variable and seemed to be under genetic control. The most productive tillers were found among the Korean local derivatives.

옥수수에 있어서 Peroxidase 8의 변이

Choe Bong Ho 韓國作物學會 1983 Korean journal of crop science Vol.28 No.3

옥수수에 있어서 다형현상에 관한 연구의 일환으로 Peroxidase 8에 대하여 수평전기 영동법에 의한 변이를 본 결과 중심주의 Peroxidase 8은 옥수수의 계통이나 품종에 따라 Fast, Slow, Fast/slow 밴드를 보여 주어 Peroxidase 8은 단일유전인자에 의하여 좌우된다고 생각되며 특히 본 연구에서 동일한 자식계통에 있어서도 상이한 밴드의 패턴을 보여주었는데 이는 사용한 계통이 동질접합체가 되지 못하였거나 혼종된 것이 아닌가 생각되어진다. 그러나 대가 자식계통의 옥수수는 Fast나 Slow의 단일 밴드패턴을 보여주었는데 반하여 단교잡 내지는 합성품종은 여러 가지 형태의 패턴을 보여주었다. 그리고 Peroxidase 8은 대개 초엽(중심주)이나 목화되지 않은 조직에서 흔히 관찰되나 Peroxidase 3와도 관계를 가지고 있는 것으로 생각되어진다. 특히 옥수수 줄기의 절에서 관찰되는 Peroxidase 3과 8의 패턴으로 보아 이 두 효소는 서로 상반되는 작용을 한다고 생각한다. As one way of evaluating polymorphism in maize, variation of peroxidase 8 (Px.8) in maize plants was investigated by means of horizontal acrylomide electrophoresis. The specific part of maize plants was stele and other parts of plants were also studied for 34 different maize lines and hybrids. The results obtained indicate that Px.8 has three distinct migrating patterns on gel such as fast, slow and fast-slow. The band pattern varied with materials used. Most hybrids were showing fast-slow band, indicating that those hybrids are heterozygous at least for Px.8 allele. Variation of band pattern was obseerved within a single inbred line. The Px.8 in stele tissue and in young leaf and nodal tissue was found to be identical, indicating the possible use of those tissues as an alternative tissue for Px.8 study. It was also found that there might be some definite relationship between Px.8 and Px.3 activities in the same tissue.

忠南 · 北, 京畿地方에서 蒐集된 在來種 찰 옥수수의 生態型特性

Bong Ho Choe(崔鳳鎬) 한국육종학회 1991 한국육종학회지 Vol.23 No.2

A Korean local glutinous maize collected in a series of Korean local maize studies was found to be an ecotype which has been grown by farmers for some period of time under typical cultivation practices. Even though the ecotype confirmed has no definite varietal name, the maize has a very peculiar plant characteristics like plant height, uniformity, tasselling date, tassels inside flag leaf, kernel color and kernel weight. The plant height is about 160cm in Korea and about 130cm in the Philippines due to the plant response to the short-day length in the Philippines. The ecotype has been maintained by open pollination by farmers in Kyongki and Chungnam-buk provinces. The low variation in plant height and other plant characteristics was observed either on collections from regions or trials between years. Two specific characteristics of the ecotype were low inbreeding depression when selfed, and high heterosis when crossed, suggesting that the ecotype has undergone considerable inbreeding in the farmers field. The delayed tasselling date of the ecotype might be due to long and heavy rainfalls during the June and July in Korea.

당진 在來鍾 옥수수에서 발견된 rindless culm(rlc)의 遺傳

Bong Ho Choe(崔鳳鎬),Hee Bong Lee(李喜鳳) 한국육종학회 1992 한국육종학회지 Vol.24 No.1

This study was conducted to determine the genetic nature of rindless culm(rlc) of the Dangin maize(Zea mays L.) line developed from Korean native lines. The materials used were 12 hybrids, including Dangjin/FR3019, reciprocal crossed between some local inbreds with Dangjin inbred tester, which shown a portion of internodes lacking rind longitudinally. All hybrids used were segregated into purple and green plants in the ratio of 3:1 in the F2. Accordingly, purple was assumed to be controlled by single domipnant gene. The rindless culm in F2 segregation of purple plant was controlled by single recessive gene. Correlation coefficients between purple plant and rindless culm, and between purple plant and stay green were very high as r=0.941 and r=0.88, respectively. Thus, these characteristics were assumed to be affected maternal effect. Using stay green gene for maize breeding in the fruture will be effective for developing better quality of silage crops.