育種學會 10週年 回顧錄

SIN KYU HYUN(玄信圭) 한국육종학회 1979 한국육종학회지 Vol.11 No.2

제13차 국제임업연구 기관 연합회대회

현신규 ( Sin Kyu Hyun ) 한국산림과학회 1962 한국산림과학회지 Vol.1 No.1

임목육종사업의 방향과 방법

현신규 ( Sin Kyu Hyun ) 한국산림과학회 1975 한국산림과학회지 Vol.28 No.1

슬라이딩 모드 제어를 이용한 ABS(Anti-lock Brake System)의 슬립율 제어에 관한 연구

신규현(Kyu Hyun Sin),정세웅(Se Woong Jeong),이병룡(Byung Ryong Lee) 한국정밀공학회 1999 한국정밀공학회 학술발표대회 논문집 Vol.1999 No.11월

선진국에 있어서의 임목육종연구의 (林木育種硏究) 동향

현신규 ( Sin Kyu Hyun ) 한국산림과학회 1972 한국산림과학회지 Vol.14 No.1

The trend and achievements of forest genetics research in abroad were investigated through observation tours and reference work and following facts were found to be important aspects which should be adopted in the forest genetics research program in Korea. Because of world wide recognization on the urgency of taking a measure to reserve some areas of the representative forest type on the globe before the extingtion of such forest type as the results of continuous exploitations of the natural forests to meet the timber demand all over the world, it is urgently needed to take a measure to reserve certain areas of natural stand of Pinus koraiensis, Pinus parviflora, Pinus densiflora f. erectra, Abies koreana, Quercus sp., Populus sp., etc. as gene pool to be used for the future program of forest tree improvement. And the genetic studies of those natural forest of economic tree species are also to be performed. 1. Increase of the number of selected tree for breeding purpose. Because of the fact that the number of plus tree at present is too small to carry out selection program for tree improvement, particularly for the formation of source population for recurrent selection of parent trees of the 2nd generation seed orchard it is to be strongly emphasized to increase the number of plus tree by alleviating selection criteria in order to enlarge the population size of plus trees to make the selection program more efficient. 2. Progeny testing More stress should be placed on carrying out progeny testing of selected trees with open pollinated seeds. And particular efforts are to be made for conducting studies on adult/juvenile correlation of important traits with a view to enable to predict adult performances with some traits revealed in juvenile age thus to save time for progeny testing. 3. Genotype-environment interaction Studies on genotype and environment interaction should be conducted in order to elucidate whether the plus trees selected on the good site express their superiority on the poor site or not and how the environment affect the genotype. And the justification of present classification of seed distribution area should be examined. 4. Seed orchard of broad leaf tree species. Due to the difficulty of accurate comparison of growth rate of neighbouring trees of broad leaf tree species in natural stand, it is recommended that for the improvement of broad leaf trees a seedling seed orchard is to be made by roguing the progeny test plantation planted densely with control pollinated seedlings of selected trees. 5. Breeding for insect resistant varieties. In the light of the fact that the resistant characteristics against insect such as pine gall midge (Thiecodiplosis japonensis U. et I.) and pine bark beetle (Myelophilus pinipera L.) are highly correlated with the amount and quality of resin which are known as gene controlled characteristics, breeding for insect resistance should be carried out. 6. Breeding for timber properties. With the tree species for pulp wood in particular, emphasis should be placed upon breeding for high specific gravity of timber. 7. Introduction of Cryptomeria and Japanese Cypress In the light of the fact that the major clones of Cryptomeria are originated from Yoshino source and are being planted up to considerably north and high elevation in Japan, those species should be examined on their cold resistance in Korea by planting them in further northern part of the country.

섬유 및 에너지생산 증대를 위한 집약적 임업경영의 필요성

현신규,이돈구 ( Sin Kyu Hyun,Don Koo Lee ) 한국산림과학회 1979 한국산림과학회지 Vol.44 No.1

Increased demand for wood products and recent energy crisis have stimulated much attention over the world to the concept of intensive forestry management systems. This shows great potential of increasing biomass yields. Biomass probably will not be a major source to solve the whole problems of fiber and energy shortage but as an alternative source it will, in part, help meet the remarkable demand. In Korea, the systems are not only feasible because of available land areas, many appropriate tree and existing forestry techniques already available, but also urgently needed.

한국(韓國)의 임목육종사업(林木育種事業)의 현황(現況)과 전망(展望) -임목육종사업(林木育種事業)의 방향(方向)과 방법(方法)

현신규,Hyun, Sin Kyu 한국산림과학회 1975 한국산림과학회지 Vol.28 No.1

An investigation on applicability of isozyme band patterns for identification of poplar clones

Jung Oh Hyun(玄正悟),Sin Kyu Hyun(玄信圭) 한국육종학회 1993 한국육종학회지 Vol.25 No.1

This paper describes the applicability of the isozyme band patterns produced by horizontal starch gel electrophoresis for identification of clones belong to genus Populus. For isozyme analysis, one to two-weeks-old leaf tissues of the clones were subjected to horizontal starch gel electrophoresis and the resulting gels were stained with four enzyme systems. The band patterns of the variable enzyme systems were characterized by using densitometer and all the distinct band patterns(gel phenotypes) were numbered. One hundred and fifteen clones out of 119 clones could be identified based on their particular band patterns of the four enzyme systems. However, the isozyme band patterns of MDH was changed every week after two weeks from leaf flushing as leaves expand and mature indicating that reproducibility of clone specific gel phenotypes for MDH is limited in a very short period of a developmental stage. Thus, using isozyme band patterns for identification and registration of poplar clones requires careful selection of either enzyme systems that would produce stable isozyme band patterns throughout developmental stages and environmental conditions or sample collection time in a specific developmental stage.

아까시나무외 몇 수종에 (樹種) 대한 X-Ray 와 Thermal Neutron 의 조사효과

김정석(Chung Suk Kim),이석구(Suk Koo Lee),현신규(Sin Kyu Hyun) 한국산림과학회 1973 한국산림과학회지 Vol.17 No.1

In an effort to improve the major tree species in Korea, the seed of Robinia pseudoacacia, Pinus rigida, Pinus densiflora, Pinus thunbergii and Larix leptolepis were treated with X-ray and thermal neutron at the Brookhaven National Laboratory, and germination rate of the seed and some characteristics of the seedlings from irradiated seed were investigated and the results were summarized as follows. 1. The germination rate of the irradiated seed of Robinia pseudoacacia, Pinus densiflora, Pinus thunbergii and Pinus rigida was decreased, when the irradiation time of thermal neutron increased from 3 hours to 9 hours. The seed of Larix leptolepis was completely died out in all range of irradiation time. 2. The seed of Pinus densiflora, Robinia pseudoacacia and Pinus rigida showed low germination rate, when the dosage of radiation increased in the range of 10,000r-30,000r X-ray. This dosage of radiation was almost lethal to the seed of Pinus thunbergii and Larix leptolepis. 3. The growth rate of radiated Robinia pseudoacacia has been decreased when the dosage of X-ray and thermal neutron increased. However, the trees treated with thermal neutron for 3 hours showed 14.9 percent-increase in seedling height and some thornless individuals appeared in this treatment. 4. Individuals with variegated leaf, rugose leaf and albino were appeared in X-ray and thermal neutron treatment. 5. Abnormal mitosis of somatic cell, cell with two nucleoli, cell with two nuclei and chromosome clump in mitosis of somatic cell were observed in Robinia pseudoacacia irradiated with thermal neutron. 6. Resistanty against pawdery mildew was decreased in Robinia pseudoacacia radiated with X-ray and thermal neutron. 7. Length of stomata did not show any difference however number of stomata per unit area decreased in Robinia pseudoacacia radiated with thermal neutron. The leaves of Robinia pseudoacacia radiated with thermal neutron were thicker than those of non-treated one, but width of palisade tissue was decreased. The most sensitive one among those species to the thermal neutron treatment was Larix leptolepis, followed by Pinus densiflora, Robinia pseudoacacia, Pinus thunbergii and Pinus rigida in the order. In X-ray treatment, the most sensitive one was Larix leptolepis, followed by Pinus densiflora, Pinus thunbergii, Pinus rigida and Robinia pseudoacacia in the order. Morphological, cytological variation of the radiated Robinia pseudoacacia seemed to indicate some possibility to be used for tree improvement.