An effective grafting method for jujube nursery trees was developed to shorten the operation time, improve the percentage of "takes" and shoot emergence, and form the better graft union. Out of 7 grafting methods, the splice, modified scion Ono graft and the bark graft showed relatively short operation time during the grafting operation comparing to the modified rootstock Ono graft or the chip budding. Among these methods, the bark graft demonstrated 100% "takes", but the modified scion Ono graft or the standard Ono graft showed 58.3% of "takes". The percentages of the vegetative shoot emergence were 100% for the bark graft, 70% for the modified scion Ono graft and lower emergence percent for the rest grafting methods. The union tissue formation for the modified scion Ono graft, the bark graft, or the whip-and-tongue graft was significantly larger than the standard Ono graft or the splice graft. In a close examination of the cross sectional areas of the graft union formation through the microscope, the bark graft was superior, the standard Ono graft was inferior and rest of the grafting methods were intermediate.

Through earlier breeding efforts, portions of the genome of the wild species Oryza grandiglumis (2n=48) have been introgressed into the rice cultivar, Hwaseongbyeo (Oryza sativa spp. japonica). Hwaseongbyeo was used as recurrent parent and O. grandiglumis

The backcross population obtained from a reciprocal cross between PD7 (A. inodora × 수식 이미지 A. psittacina) and P002 (A. inodora) was used for the QTL analysis. A total of 122 individual BC₁ 수식 이미지 plants were scored for 12 traits and interval ma

Genetic linkage maps of Alstroemeria Brazilian species were constructed using AFLP markers. Reciprocal backcross mapping population with 122 individuals was obtained between A. inodora and A. psittacina, Brazilian species that are commonly used in the com

Several plant growth regulators were examined for on their effect on the in vitro propagation of Kalopanax pictus(THUNB.) (NAKAI.) on WPM medium. Among the cytokinins tested, BA at 13.32 μM appeared to be the most effective for multiple axillary shoot formation. Although the addition of 2.89 μM GA3 promoted stem elongation, it produced morphologically abnormal leaves and stems. For rooting of the shoots, 4.9 μM IBA seemed to be more effective than 2.69 μM NAA. When the regenerated plants were transferred on artificial mixture containing vermiculite and peat-moss (1 : 1, v/v), 81% of them survived and grew normally.

The wild Pyrus plants belong to the deciduous woody plants in Rosaceae family. Most are cultivated for fruit productions, but some for ornamental plants. There are 5 Pyrus species including Pyrus ussuriensis and 8 varieties cultivated in Korea. In Korea, these plants are populated near villages or on the hills, and they are easily propagated since their fruit are very juicy and quite big in size. Plant breeding to get improved cultivars is not difficult because the Pyrus plants are easy to cross breeding among its genus. Because not only this reason but there have been shown lots of variation in wild groups, the Pyrus plants inhabited in Korea are excellent deciduous woody plants and favorable fruit trees to develop ornamental plants. It is necessary to develop many kinds of fruit trees and ornamental trees containing genetically different character, so that it will be satisfied for many different people's taste and demands. Collecting lots of wild plant resource with diverse genes is necessary for plant breeding.

These experiments were conducted to evaluate the variability of seed germination and seedling growth with different levels of polyethylene glycol(PEG 6,000) solution in onion seed. Average germination percentage of seed primed in PEG solution with 1.00 and 0.75 MPa was higher than control, and that of seed primed in 1.50MPa was lower than unprimed control. Germination percentage(GP) of seed primed for 5 days was highest, and as the primed days become long, the GP was decreased. The GP of airation seed during the primed was higher than that of unairation seed, about 5% , respectively. The GP of washed seed after primed was higher than that of unwashed seed, but that of redried seed after primed was lower than that of the others. The highest GP cultivar was Chunjoogoohyung and the lowest GP cultivar was Seouldego in unredried seed after primed, but Chunjoojoonggo was highest and Jungpoonwhang was the lowest cultivar in redried seed after primed. As the PEG concentration increased, the seedling length(SL) was shortened, and seed primed for 15 days was longer than other treatments. The SL of primed seed was similar to GP. The SL of washed seed after primed was longer than that of others, but that of redried seed after primed was shortest among the others. The SL of Chunjoojoonggo and Nongwoodego was longest and Seouldego was shortest among the cultivars in unredried seed after primed, but that of Chunjoogoohyung and Chunjoojoonggo was longest and Seouldego was the shortest cultivars in redried seed after primed.

본 실험은 alfalfa 와 vetch의 추출물과 잔유물의 콩과 옥수수에 대한 타감작용을 검정하기 위해서 실시 되었다. 콩과 옥수수에 대한 타감작용을 검정하기 위해서 영양생장기 때에 수확된 alfalfa 와 vetch를 건조시켜 추출물을 얻었고 또한 이들 잔기를 silica sand와 혼합처리하여 콩과 옥수수의 생육을 검토 하였고, 콩에 대해서는 근류균의 착생정도를 조사 하였다. 1. 발아시험에서는 롱과 옥수수의 발아율, 유근의 생장, 무게 등이 추출물 농도가 증가할수록 억제 되었으며, 최고 억제정도는 추출물 농도 20%에서 발생되었다. 추출물에 대하여 콩이 옥수수보다 더 민감하게 반응하였으며, alfalfa의 추출물이 vetch의 추출물보다 더 억제적이었다. 2. Alfalfa와 vetch를 silica sand에 혼합하여 콩과 옥수수의 간장, 엽면적, 지상부의 생육정도를 비교하였을 때 콩의 간장, 업면적, 지상부 생육은 alfalfa처리에서 더 억제적 이었으며, 옥수수의 생육은 vetch 처리에서 촉진 되었다. 3. Alfalfa와 vetch처리가 모두 콩 뿌리혹의 형성을 억제시켰는데 alfalfa처리가 vetch의 처리보다 뿌리혹의 형성을 더 억제 시켰다. 4. Alfalfa와 vetch의 추출물과 잔기의 처리는 옥수수보다는 콩의 발아와 생육에 더 억제적으로 작용하므로 콩 재배의 경우에는 이들 잔기의 관리가 필요하다고 생각되어진다.

본 실험은 포장에서 주로 발생하는 velvetleaf등을 비롯하여 7종류의 잡초를 마른 상태와 생체상태로 각각 수확하여 지상부와 지하부로 나누어 물질을 추출 이들을 alfalfa 종자 발아와 생육정도 검정에 사용하여 지상부와 지하부의 생육억제정도를 비교하였으며 이 중 억제효과가 제일 큰 velvet-leaf의 추출물은 여러 농도로 silica sand와 혼합하여 alfalfa에 대한 타감작용을 검토하였다. 1. 7종류 잡초의 지상부와 지하부의 추출물 처리는 alfalfa의 발아율, 발아세, 유근의 길이, 무게 등을 억제시켰다. 지상부와 지하부의 억제효과를 비교하면 지상부의 추출물이 지하부의 추출물 보다 더 큰 타감작용을 보였으며, 이 중에서 velvetleaf 추출물이 가장 억제적이었고, crab-grass 추출물은 가장 낮은 억제 정도를 보였다. 또 alfalfa 발아와 유근의 생육에 대한 velvetleaf의 건조 추출물과 생체 추출물을 비교하면 건조 추출물이 더 억제적이었다. 2. 농도에 따르는 velvetleaf 추출물 처리에서는 농도가 증가할수록 alfalfa 발아율, 유근의 길이, 무게 등이 대조구와 비교하여 상대적으로 더 억제되었다. 3. 건조된 velvetleaf 잔기를 silica sand와 혼합처리에서 잔기의 비율이 증가 될수록 alfalfa의 출현율과 생존율이 더 억제되었으며 그 정도는 잔기 비율 1%에서 가장 억제적이었다. 4. 잡초의 추출물과 잔기의 처리는 alfalfa의 발아와 생육에 억제적으로 작용 하여 타감작용이 인정되었다.

In this study, to identify the ineffectiveness of inter-connected system of cargo volume between the Pusan Port and inland areas and also to make more rational suggestions, the following conclusions were drawn by analyzing Container Cargo Traffic from BCTOC to Off-Dock CY: 1. There existed about 30% to 50% reduction in the container transport times when the container transport vehicles were operated during the off-peak period to alleviate the traffic congestion due to mixed traffic. 2. There appeared to be more economic when Off-Dock DY's scattered around the City of Pusan were unified in one ODCY Unit at YangSan, and the Exclusive Overpass Freeway System for the container transport vehicles were constructed and operated on the existing Urban Freeway from BCTOC ti this ODCY Unit (Expected to make about 230 billions Won in net present value by NPV method).