보리 品質育種을 爲한 B-glucan viscosity 測定의 實用的 方法 硏究

Dong Hee Chung(鄭東熙),Kyung Soo Min(閔庚洙),Tae Young Chung(鄭泰英),Eun Sup Lee(李殷燮) 한국육종학회 1985 한국육종학회지 Vol.17 No.1

To set up an efficient screening method of β-glucan viscosity in barley breeding, this experiments were carried out. The presently tested Ostwald Viscosimeter was able to assay the viscosity with smaller sample (0.5 g) in greatly reduced checking time (1/3) when compared with the Falling Ball Viscosimeter. The viscosities measured by the two instruments, and extracted with acid and alkali solutions showed highly positive correlation. It was considered to be convinient and appropriate that the viscosity test was conducted at 25℃ and within an hour after extraction.

多變量 解釋法에 의한 苧麻의 品種群 分類

Dong Hee Chung(鄭東熙),Byung Sun Kwon(權炳善),June Taeg Lim(林俊澤),Sang Gon Kim(金祥坤) 한국육종학회 1993 한국육종학회지 Vol.25 No.2

Varietal distances measured by Mahalanobis’s D² statistics in 2278 possible comparisons among sixty eight varieties of ramie with seven characters, stem length, stem diameter, number of branches per 3.3㎡, percentage of productive tillers, yield of fresh stem, leaf and dry fiber and fiber percentage, and a complete linkage cluster analysis based on the D²s were attempted. Sixty eight ramie cultivars were largely classified into five varietal groups. Group 2, group 4 and group 5 contained twenty three(34%), sixteen(24%) and fifteen cultivars(22%), respectively. Most varieties in group 1 and 2 showed more fiber yield, and varieties in group 2 and 5 showed higher percentage of productive tillers per plant but lower fiber yield. Most of the varietal groups were not associated with their geographical origin. Stem diameter and fiber yield among the seven characters were the largest conrivutors to the D² in both intra and inter groups.

Hordeum bulbosum 을 利用한 半數性 보리의 同定

Dong Hee Chung(鄭東熙),Kyung Soo Min(閔庚洙),Jong Un Chun(千鍾殷) 한국육종학회 1994 한국육종학회지 Vol.26 No.3

This study was conducted to authenticate barley haploids by cytological, electrophoretical and morphological observations in order to establish an effective bulbosum method. Somatic chromosome numbers were 7 in the suspected barley hybrids compared to 14 in both H. bulbosum and H. vulgare, even though the chromosomes of the two species were not exactly distinguished. Barley haploid was clearly shown because of the different isozyme patterns of the two species, and suspected barley haploids. The colchicine-induced diploids with H. bulbosum chromosomes always displayed several characteristics of H. bulbosum, especially prostrate habit of growth. Progeny of the diploids was morphologically identical to their seed parents, which was the additional proof that they were diploids of genetically complete barley haploids. Genotypic variation for haploid embryo formation in eleven selected Korean barley cultivars ranged from 15 to 52%, and the variation for plant development from embryo culture ranged from 18 to 55%. H. bulbosum pollinator, GBC gave a little better results for embryo formation and plant development than Sp. D. did.

도나투스 연극론의 16세기 전반 스페인 연극론에 미친 영향에 관한 연구 -극작품들의 패러텍스트를 중심으로

정동희 ( Dong Hee Chung ) 서울대학교 인문학연구원 2016 人文論叢 Vol.73 No.1

El proposito de este estudio consiste en revelar la enorme influencia del opusculo de Donato sobre el genero dramatico en la formacion de la preceptiva dramatica espanola de la primera mitad del siglo XVI y su caracteristica historico-literaria. Antes de la circulacion de la Poetica aristotelica, lo que lidero el desarrollo de la teoria dramatica fue la poetica terenciana, o mejor dicho, los breves escritos teoricos sobre el genero dramatico que son material liminar de las obras terencianas con comento. Desde mediados del siglo XV los autores espanoles como Juan de Mena y el Marques de Santillana mostraron la gran huella de la preceptiva donatiana en los paratextos de sus obras como prologo, preambulo y dedicatoria y consideraron a Terencio como el mejor comediografo. En la primera mitad del siglo XVI el concepto dramatico donatiano mostrado en las obras dramaticas es notablemente uniforme y no se desvia de la preceptiva terenciana sugerida por Donato y los otros comentaristas de las obras terencianas. Dado que la doctrina donatiana ponia enfasis en la retorica mas que las calidades que distinguen el metodo dramatico, los dramaturgos espanoles podian disfrutar de mayor flexibilidad y libertad en su proceso de creacion por lo cual podian introducir los elementos no teatrales prestados de otros generos coetaneos sin limite. Por esta situacion psiquico-historica, las obras dramaticas de la primera mitad del siglo XVI pudieron obtener las caracteristicas peculiares dentro del marco del concepto dramatico donatiano.

High-frequency haploid production from Japanese wheat genotypes crossed with tetraploid hordeum bulbosum

Dong Hee Chung(鄭東熙),Masanori Inagaki(稻垣正典) 한국육종학회 1986 한국육종학회지 Vol.18 No.3

The crossabilities of the three cultivars and their F₁ hybrids of Japanese wheat (Triticum aestivum L.) with two clones of tetraploid Hordeum bulbosum after the treatment of 2, 4-dichlorophenoxyacetic acid (2, 4-D) were investigated. The effect of 2, 4-D treatment was significantly advantageous for increasing seed set. The frequencies of seed set with embryo formation were 35.8% of florets pollinated when treated with 2,4-D. The crossability was also profoundly influenced by the genotypes of wheat and the clones of H. bulbosum. Immature embryos were aseptically regenerated to haploid plants at a frequency of 85.0%. As a result, the average frequency of haploid production was approximately 30% of florets pollinated. The potential of wheat haploids in breeding programmes was discussed.

보리B-glucan 粘度의 變異에 關한 硏究

Dong Hee Chung(鄭東熙),Kyung Soo Min(閔庚洙),Tae Young Chung(鄭泰英),Eun Sup Lee(李殷燮) 한국육종학회 1985 한국육종학회지 Vol.17 No.2

Genetic and environmental variations of β-glucan viseosity were examined for barley breeding progrm. β-glucan viscosity was the highest in waxy barleys(42.8sec/ml),and followed in order by malting barleys(18.8sec/ml),eovered barly(20.3sec/ml),naked barley (25.4sec/ml). It also significantly differed among cultivars within kinds,and among the grains produced in 3 different areas,however this order of viscosity among the cultivars showed consistancy in all the areas,indieating that this character was conducted by genotypes and also influenced by environments without genotype x environments interactions. The cultivars with longer maturity period generally had higher β-glucan viscosity (r=0.74**). Relationship between β-glucan viscosity and grain sizes or protein content was positively sisnificant. β-glucan viscosity was increased in the grains grown under dry conditions, but decreased in those of delayed harvest.

보리再培種과 野生種(hordeum bulbosum) 間 雜種 幼胚의 發育增進

Dong Hee Chung(鄭東熙),Kyung Soo Min(閔庚洙),Jong Un Chun(千鍾殷) 한국육종학회 1994 한국육종학회지 Vol.26 No.1

The purpose of this study is to investigate effects of materials and colors of crossing bags, removal of florets in a spike on formation and development of seed set and embryos, and to observe development of haploidy and diploidy embryos at different days after pollination for bulbosum method. Cellophane, polyethylene or paper was not suitable for crossing material, because the florets bagged with those materials turned to yellow and died not long after pollination. The humidity within the bags dropped too low when cellophane or paper was used, due to their porosity. While it rised too high upto dew point when polyethylene was used for its air-tightness. Double bags of parchment(16㎝ long)+ polyethylene (10㎝ long) which kept the temperature inside bags around 25℃, gave the best rates of formation and development of the embryos. The parchment inside functioned as a buffer against moisture by absorbing and releasing water properly. Path analysis with temperature, moistutre and light intensity inside the bags indicated moisture was the primary factor mostly influencing the embryo development. Removal of rows in a spike as a means of thinning out florets was not effective to improve development of embryo substantially. From the comparative observation on the haploid development of the seed set by H. bulbosum pollinator with diploid those set by selfing, it was noticed that the former had much smaller embryos, lacking morphologically differentiated organs in 14 days after pollination. The endosperm which had few starch particles in 11 days, was completely liquidified in 14 days after pollination.

참깨 遺傳資源의 倒伏關聯形質 變異 및 相關

Chung Beom Park(朴忠範),Byung Ryeol Sung(成炳列),Dong Hee Chung(鄭東熙) 한국육종학회 1991 한국육종학회지 Vol.23 No.3

Analysis was made on the variation and correlation among the major agronomic characters related to lodging in 108 collections of sesame germplasm. Plant height ranged from 49cm to 120cm being 95cm in mean, and of which were 17 varieties belower than 80cm. The mean of major characters were 59cm in length of capsules bearing stem, 11.3mm in stem diameter, 7.9cm in 3rd internode length, 12.4mm in root diameter, 13cm in primary root length and 61° in root distributive angle. There were 11 varieties of root diameter above 14mm, 24 varieties of root distributive angle above 70°, 13 varieties of lodging degree from zero to one, respectively. A highly significant positive correlation were shown between plant height and length of capsules bearing stem, between stem and root diameter, between the number of adventitious roots and root distributive angle. Lodging degree was highly positive correlation associated with plant height and length of capsules bearing stem, but which showed negative correlation with stem and root diameter, primary root length, the number of adventitious roots and root distributive angle.

토양수분 부족이 토천궁의 (土川芎) 생육에 미치는 영향

김충국(Chung Guk Kim),강병화(Byeung Hoa Kang),고문환(Mun Hwan Koh),정동희(Dong Hee Jung),서종허(Jong Ho Seo) 한국약용작물학회 1996 한국약용작물학회지 Vol.4 No.4

The experiment was conducted to clarify the effect of water stress treatment on growth character of Ligusticum chuanxiong Hort. The water stress treatment was imposed artificially on seedling, flowering and rhizome enlargement stage of the plant. The decrease ratio of leaf area compare with control decreased to 24.4% by water stress treatment at seedling stage and to 41.6% at rhizome enlargement stage. The reduction rate of chlorophyll content at the end of water stress treatment was 41.2% at the seedling stage and no difference at the flowering stage. The chlorophyll content of water stress treatment on seedling and flowering stage was recovered to 95% at harvest time. The ratio of rootlet distribution from top soil to 10㎝ depth showed maximum to 90% at the seedling stage and to 20㎝ depth showed maximum to 6.4% at the rhizome enlargement stage. The dry weight of rootlet was decreased to 19.3∼40.3% by water stress treatment. Dry weight of aerial part and underground part of the plant decreased in the order of seedling, flowering, rhizome enlargement and control and the dry weight of aerial part decrease more severely than underground part.

유채의 단백질함량과 아미노산조성의 품종간 차이

방진기,이정일,정동희,김기준,Bang, Jin-Ki,Lee, Jung-Il,Chung, Dong-Hee,Kim, Ki-Joon 한국작물학회 1990 한국작물학회지 Vol.35 No.5

유채, 계자 등 Brassica속 유전자원을 대상으로 단백질 함량과 아미노산 조성을 분석 조사하여 유채 양질 다수성 품종육성에 필요한 기초자료를 얻고자 시험을 수행한 바 그 결과를 요약하면 다음과 같다. 1. Brassica속 유전자원의 단백질 함량은 15.3%에서 36.2%까지의 넓은 변이폭을 보였으며, 평균 단백질 함량은 23.2%로 나타났다. 단백질 함량이 가장 높은 품종은 캐나다 유래의 B.hirta인 Ochre였으며 가장 낮은 품종은 B. napus인 Mirado였다. 2. 종실이 소립으로 가벼울수록 단백질 함량은 높은 경향이었다. 3. Brassica속 작물의 단백질 함량 변이는 B.napus에서 15.3-30.2%의 범위를 보여 주었으며, B.juncea, B.carinata, B.hirta, B.nigra등은 31% 이상으로 매우 높게 나타났다. 4. 단백질 함량과 유박내 유해성분함량간에는 뚜렷한 경향은 없었으나 단백질과 기름 및 1,000립중간에는 고도의 부의 상관을 보여주었다.