헛개나무 과병 다수확 우량개체 선발

정헌관 ( Hun Gwan Chung ),심세현 ( Sea Hyun Kim ),장용석 ( Yong Seok Jang ),박형순 ( Hyung Soon Park ) 한국산림과학회 2004 한국산림과학회지 Vol.93 No.3

The objectives of this study, an analysis of the variation for bunch and fruit morphological characteristics and investigation of the characteristics for flowering and fruiting among the selected clones of Hovenia dulcis var. koreana Nakai. could be used for the conservation of gene resources and could provide information to superior trees selection. The results obtained from this study can be summarized as follows; In the fruiting characteristic analysis, total means of the Diameter of fruiting lateral(DFL), Number of total flowering lateral(NTFL), Number of fructify lateral(NFL), Rate of fructify lateral(RFL), Number of average bunch per fructify lateral(NABFL), and Number of average bunch per fruiting lateral(NABPFL) were 1.57cm, 14.5, 12.5, 82.56%, 3.23 and 39.18, respectively. Especially, the range and coefficient of variation for the NTFL and NFL, NABFL and NABPFL characteristics were 3~60(CV=57.8%) and 1~60(CV= 69.0%), 1~28(CV=56.0%) and 7.3~91.6(CV=61.2%), respectively. In the bunch and fruit morphological characteristic analysis, means of the Bunch length(BL) and Width (BW), and Weight of bunch(WB) were 33.37mm, 44.05mm and 7.38g, respectively. And, the coefficient of variation and range for the these characteristics were 8.8~130.1mm(CV=41.1%), 11.0?100.6mm (CV=30.2%), and 0.2~40.6g(CV=75.1%), respectively. In the Number of fruit per bunch(NFB) and Number of fruit petiole per bunch(NFPB) characteristic analysis, means of the NFB and NFPB were 14.24 and 2.81, respectively. In the Length and Width of fruit(LF and WF) characteristic analysis, means, range and coefficient of variation for the LF and WF were 7.48tnm, 6.1~9.6mm, 6.8% and 6.89mm, 5.7~8.6mm, 6.0%, respectively. The selection level based on major fruiting characteristics, which are the NFL over 16, NABFL over 3.1, NABPFL over 58, and WFPI and Yl over 2.9kg and 6kg, were applied on 47 sample clones, and five clones were selected(priority of 10% rank). The selection effects from selected clones in NFL, NABFL, NABPFL, WFPI and YI were evaluated as 152%, 119%, 182%, 327% and 320% compared to the mean of those 47 sample clones, respectively. Especially, GW 3-3 showed excellent values that NABPFL, WFPI and YI were 91.68, 4.7kg, and 11.26kg, respectively, suggesting a promising new superior tree for high fruit petiole productivity.

미국흰불나방(Hyphanria cunea)에 대한 곤충병원성선충 Steinernema carpocapsae의 병원성

박형순,김형환,정헌관,조윤진,전흥용,장한익,김동수,추호렬,Park Hyung Soon,Kim Hyeong Hwan,Chung Hun Gwan,Cho Yoon Sin,Jeon Heung Yong,Jang Han Ik,Kim Dong Soo,Choo Ho Yul 한국잔디학회 2004 한국잔디학회지 Vol.18 No.4

Environmentally sound control of fall webworm, Hyphanria cunea (Drury) with entomopathogenic nematode, Sreinernema carpocapsae Pocheon strain was evaluated in the laboratory and pot. Pathogenicity of 5. carpocapsae Pocheon strain was different depending on larval stage, i.e., mortality of the 2nd instar and the $3\~4th$ instar was $100\%$ with >20 infective juveniles (Ijs)/larva in 3 days, but the 5th instar was $34\%$ with (Ijs)/larva in 3 days. Pathogenicity of 5. carpocapsae Pocheon strain was higher with increasing nematode concentration. Mortality of Hyphanria cunea larva by 5. carpocapsae Pocheon strain was not significantly different (more than $70\%$) between nematode concentration on treated trees (Malus alba and Platanus orientalis) and in pot. 곤충병원성선충 Steinernema carpocapsae 포천 계통을 이용하여 미국흰불나방 (Hyphanria cunea)의 환경친화적 방제 가능성을 알아보기 위하여 실내와 포트에서 실험을 수행하였다. Steinernema carpocapsae 포천 계통의 병원성은 미국흰불나방의 령기에 따라 병원성의 차이가 있어 2령충과 $3\~4$령 혼재 처리에서는 미국흰불나방 유충 당 20마리 이상 선충 처리에서는 $100\%$치사하였으나, 5령충에서는 80마리 선충 접종 시에도 처리 3일 후 $34\%$의 치사율을 보였다. Steinernema carpocapsae 포천 계통의 접종농도가 높을수록 미국흰불나방의 치사율은 증가하였다. Pot 실험에서 수종 (뽕나무와 버즘나무)간이나 선충 농도간에 미국횐불나방 유충에 대한 치사율은 차이가 없어 $70\%$ 이상의 치사율을 보였다.

침엽의 수지구 (樹脂溝) 위치에 의한 우리나라 소나무의 이입교잡현상 (移入交雜現象) 연구

류장발,홍성호,정헌관 ( Jang Bal Ryu,Sung Ho Hong,Hun Gwan Chung ) 한국산림과학회 1985 한국산림과학회지 Vol.69 No.1

Introgressive hybridization of Pinus densiflora in Korea was investigated by examining the position of resin ducts in 4,992 trees from 67 populations. Judging that P. densiflora has only external resin ducts, P. thunbergii only medial resin ducts, and any tree which has even one needle with external and medial resin ducts is hybrid, hybrids are found at all populations investigated. As variation in position of resin ducts was found among needles on a tree, the number of needles investigated from a tree affects judgment of the tree`s hybridity. Therefore, hybridity seems to be judged by many traits rather than by the single trait, position of resin ducts. Seed production by artificial pollination between P. densiflora and P. thunbergii was very poor, i.e. one full seed from five female flowers or from two mature cones. This poor seed production, in addition to the low hybrid vigor, if any, seems to make the artificial pollination between the two species for mass-production of seeds for planting impractical.

헛개나무 선발개체의 특성과 꿀벌 방화

김세현(Sea-Hyun Kim),정헌관(Hun-Gwan Chung),한진규(Jingyu Han) 한국양봉학회 2005 韓國養蜂學會誌 Vol.20 No.1

This study was estimate and analysis about characteristics of flowering, fruit and foraging of honeybee from 70 clones of Hovenia dulcis var. koreana Nakai. that trees cultivated for superior tree selecting. The results obtained from this study can be summarized as follows. 1. 9 clones showed over 1,000 flowering among flowered 50 clones. Flowering period was 19 days from 17 June to 5 July. Flowering peak appeared 25 June and that showed 25% flowering rate. 2. In the fruiting characteristic analysis, total means of the Diameter of fruiting lateral(DFL), Number of total flowering lateral(NTFL), Number of fructify lateral (NFL), Rate of fructify lateral(RFL), Number of average bunch per fructify lateral(NABFL), and Number of average bunch per fruiting lateral(NABPFL) were 1.57㎝, 14.5, 12.5, 82.56%, 3.23 and 39.18, respectively. Especially, the range and coefficient of variation for the NTFL and NFL, NABFL and NABPFL characteristics were 3~60(CV=57.8%) and 1-60(CV=69.0%), 1~28(CV=56.0%) and 7.3~91.6 (CV=61.2%), respectively. Among Selected 10 clones which had major fruiting characteristics, GW 3-3, GW 1-17 and GW 1-9 showed 91.68, 86.00 and 63.30 for NABFL, respectively. Also, Ranges of Weight of fruit petiole per individual(WFPI) and Yield of individual(YI) were 3.9~4.7㎏ and 9.43~11.26㎏, respectively in GW 3-3, GW 2-5 and GW 1-17. 3. Results of annual flowering characteristic from 2000 to 2005 showed three years cycle for flowering rate. 4. Honeybee foraging started 17 June and ended 5 July in flower of Hovenia dulcis var. koreana Nakai. The most number of honeybee foraged on 25 June and that number was 226.3. Foraging of honeybee was more influenced by precipitation than temperature. Also, Foraging started 8 o'clock and showed peak 12~13 o'clock and decreased after peak time and ended 19 o'clock in results of foraging estimate by hour.

밀원수종 마가목屬의 개화특성 및 유연관계

김세현(Sea Hyun Kim),정헌관(Hun Gwan Chung),장용석(Yong Seok Jang),한진규(Jingyu Han),서희원(Hee Won Seo),박인협(In Hyeop Park) 한국양봉학회 2006 韓國養蜂學會誌 Vol.21 No.1

Approximately, S. amurensis and S. aucuparia showed higher values than other species in the overall inflorescence and petal characteristics. However, long and short width of inflorescence characteristics did not show statistically significant characteristics among the species. From the principal component analysis of inflorescence and petal characteristics of flowers, two principal components(PC's) were obtained, which explained the variation of inter-specific relations among the genus Sorbus. The first PC's showed eigenvalue 2.4 and 3.2, which explained 60.2% and 81.0% of the variation, respectively. And, the second PC's showed eigenvalues 1.4 and 0.7, which explained 96.2% and 99.0% of the variation, respectively. Furthermore, cluster analysis for those two characteristics resulted in two major groups although there were small intra-specific variations. The first group comprises S. commixta, S. sambucifolica var. pseudogracilis, and S amurensis, and the second group consists S. aucuparia. only.

밀원수종 헛개나무의 삽목증식 특성

김세현(Sea Hyun Kim),정헌관(Hun Gwan Chung),한진규(Jingyu Han) 한국양봉학회 2006 韓國養蜂學會誌 Vol.21 No.1

This study was conducted to investigate the multiplication characteristics of Hoventa dulcis var. koreana Nakai by cutting. As honey plant, value of H. dulcis was rising steadily. Differences of rooting rate by growth regulators, cutting timing, crown position of cutting and ortet age were estimated and that results were as follows: 1. Effects of growth regulators on rooting was showed that IBA 2,000 ppm instant soak treatment was the best rooting rate, 100%, IBA 50 ppm and 100 ppm treatment were 98%, IBA 25 ppm was 88%, IBA 500 ppm instant soak treatment was 75% and control was 45%, respectively. The difference of rooting rate was large by treatment of growth regulators. Also, that results were showed significantly difference among treatments. 2. Seasonal effects on rooting rate showed the best rooting rate, 85% at early in April cutting when it was just before timing of leaf burst and other rooting rates showed below 55% after leaf burst. 3. Rooting rate by crown positon of cutting showed the best at middle position, 88%. Rooting rate of upper and lower position were 83% and 62%, respectively. That result was showed significantly difference among treatments. 4. Rooting rate by ortet age showed the best in one-year-old ortet and rooting rate was sharply decreased when ortet age was increased. Rooting rate of five-year-old ortet was 83% and ten-year-old ortet was 47%. Also, rooting rate of over 30-year-old ortet was 7%.

복분자딸기 클론별 과실특성과 항산화 활성 탐색

김세현 ( Sea Hyun Kim ),정헌관 ( Hun Gwan Chung ),장용석 ( Yong Seok Jang ),박영기 ( Young Ki Park ),박형순 ( Hyung Soon Park ),김선창 ( Sun Chang Kim ) 한국산림과학회 2005 한국산림과학회지 Vol.94 No.1

Fruit characteristics, saccharinity, and antioxidalive activity of selected clones of Rubes coreanus, grown in Korea, well-known as edible and medical resources, frequently used and which has an excellent pharmacological activity are examined and analyzed. The results obtained from this study can be summarized as follows; Result of surveying characteristics for the fruit and saccharinity variation by collection time, there are some meaningful differences between examined clones and the collection time, exception of the fruit width. From the clones, SG 3 is the biggest in size, the highest in the saccharinity out of five clones, on the other hand, CJ 18 and SH 3 are the opposite. Meanwhile, comparing examined saccharinity factor with maximum temperature and precipitation out of daily climates at Suwon Meteorological Observatory at the same period, on the day the highest temperature is 29.5℃, saccharinity distinctively ascends, but on the day the precipitation is recorded 121.5 mm and next day. the saccharinity descends. Also, five-day saccharinity until the precipitation lower than 0.1 mm per day shows from 10,4 to 11.5 Brix higher than the average saccharinity of 9.7 Brix. Fifteen clones including CA 6 about fruit characteristics in terms of collection layer and saccharinity variation were examined, there is significantly difference among examined clones. but about the collection layer, only saccharinity factor has meaningful significance. For clones, MJ 11 is the biggest and excellent character of 15 clones but the saccharinity, 10.3 Brix lows a bit, MC 9 and HAE 5 are the worst fruit in character but saccharinity is 13.4 Brix and 10.6 Brix which is higher than the average saccharinity of 9.8 Brix. About saccharinity for the collection layer, the fruit average saccharinity, collected from the upper layer which is good at lightness and temperature condition, is 10.2 Brix which shows higher than the one of the fruit, 9.7 Bix and 9.5 Brix collected from the middle or the lower layer. The saccharinity of fruit collected from the middle or the lower layer is lower than the average saccharinity of 9.8 Brix out of 15 surveyed clones. Surveying antioxidative activity resulted from free radical scavenging activity about 30 clones of fruit in total, there is difference between surveyed clones. Especially, Tmmatured fruit extracts exhibited higher free radical scavenging activity of 94.5 to 97.5% which indicates the similarity to Ascorbic acid, unlike other clones, on the concentration of 250 to 1,000 ppm.

보문 : 무궁화 해충과 천적의 종류

박형순 ( Hyung Soon Park ),정헌관 ( Hun Gwan Chung ),조윤진 ( Yoon Jin Cho ),김세현 ( Sea Hyun Kim ),김형환 ( Hyeong Hwan Kim ),김지수 ( Ji Soo Kim ) 한국토양동물학회 2004 한국토양동물학회지 Vol.9 No.1,2

주목 세포배양에 의한 Taxol 생산

전정욱(Jeong Wook Jeon),조병관(Byung Gwan Cho),문원종(Won Jong Moon),김동일(Dong Il Kim),정헌관(Hun Gwan Chung),변상요(Sang Yo Byun) 한국생물공학회 1996 KSBB Journal Vol.11 No.3

강원지역 마가목 천연집단의 생태적 특성

김세현(Sea-Hyun Kim),한진규(Jingyu Han),정헌관(Hun-Gwan Chung),이도형(Do-Hyung Lee),송연희(Youn-Hee Song),정동준(Dong-Jun Chung) 한국양봉학회 2008 韓國養蜂學會誌 Vol.23 No.1

Forty eight sites were selected in four local areas of natural stands of Sorbus commixta for phytosociological study. Vegetation patterns of S. commixta community group were divided into Magnolia sieboldii community, Salix hallaisanensis community and Symplocos prunifolia community, and totally four vegetation units seemed to be accompanied. Among three vegetation types at the natural stands of S. commixta, Magnolia sieboldii community were sub-divided into two types; one was Sambucus williamsii var. coreana group characterized by the presence of Meehania uriticifolia, Adenophora remotiflora, Polystichum tripteron, Aconitum pseudo-laeve var. erectum and Impatiens nli-tangere, the other was Rhododendron brachycarpum group characterized by the presence of Lycopodium serratum, Thuja koraiensis and Saussurea conandrifolia. Sambucus williamsii var. coreana group can be sub￢divided into two types; one was Comus walteri subgroup characterized by Synurus deltoides, Aconitum longecassidatum and Actinidia arguta, the other was Sambucus williamsii var. coreana type subgroup.