Background : For ginseng breed development, mostly the pure-line separation method that registers excellent varieties after performing the regional adaptation test with the varieties selected through the preliminary and main productivity tests on selected excellent individuals cultivated in farms or excellent lineages for growing from collected lineages is used. Recently, the quality of ginseng is degrading while the yield decreases by 15 - 20% due to the high-temperature injury, the physiological disorder and/or the diseases caused by the climate warming so that development of disaster tolerant varieties strong against high temperatures, salts and diseases are demanded. For such reason, three lineages showing excellent overground and underground growing were selected from the gene resources collected from 1997 to 2000. And the productivity test has been conducted with these lineages having Chunpoong and Yunpoong, the existing varieties as the reference varieties. For the lineages excellent in growing, the variety registration will be performed after the regional adaptation test. Methods and Results : The results of productivity tests on the 3 lineages (GS98-3-4, GS00-58 and GS97-69) selected for excellent growing while having Chunpoong and Yunpoong as the reference varieties show that on the 2-years-old dormant roots, all of the selected 3 lineages are better in growing compared to the reference varieties. Especially, GS98-3-4 shows excellent leaf lengths and stem lengths while GS97-69 shows excellent leaf widths. On the overground growing of 3-years-old ones, GS00-58 and GS97-69 lineages are exceedingly more excellent compared to the reference varieties while the selected 3 lineages showing superb underground growing. Especially, GS98-3-4 lineage shows great root weights and diameters. Conclusion : According to the productivity tests on the 3 lineages selected for excellent growing, the selected lineages are excellent in both overground and underground growing compared to the reference varieties of Chunpoong and Yunpoong. On the 2-years-old ginsengs, GS98-3-4 shows excellent overground growing while GS97-69 shows excellent underground growing. On the 3-years-old ginsengs, GS00-58 and GS97-69 show excellent overground growing while GS98-3-4 shows excellent underground growing.

Background : For cultivation of varieties of ginseng, the pure line selection method, which is to select the best among those cultivated in farms for pedigree breeding, replicated yield trials and regional adaptation trials before registering as a new variety, is widely used. Although there are 25 registered varieties of ginseng in Korea, the quality of ginseng is declining together with the amount of harvest being decreased by 15 - 20% due to the heat injuries and diseases from the warming & abnormal climate. Thus, the needs for development of disaster-resistant varieties with better chances of surviving through high temperature, salts and disease are increasing. Therefore, this study is to cultivate disaster-resistant varieties among those selected for their disaster tolerance and salt tolerance through regional adaptation trials. Methods and Results : As a result of examining the growth characteristics of the selected 2 - 5 year old varieties used in the study, among the 5-year old crops, Goryeo 4 and Eumseong 5 showed superior growth in both above and below aerial parts, and among the 4-year old crops, Eumseong 11 and Cheonryang showed superior growth while the growth in the below aerial parts were satisfactory in the order of Cheonryang > Eumseong 10 > Eumseong 11 > Eumseong 9. Among the 3-year old crops, the most superior growth in both above and below aerial parts was observed in Eumseong 14 with the weight of the below aerial part, root diameter and taproot length at 13.8 g, 11.8 ㎝ and 6.2 ㎝ respectively. Among the 2-year old crops, Eumseong 10 showed the most superior growth in both above and below aerial parts. Conclusion : Based on the above results, Goryeo 4 and Eumseong 5 among the 5-year old crops, Eumseong 11 among the 4-year old crops, Eumseong 14 among the 3-year old crops and Eumseon 10 among the 2-year old crops showed the most superior growth among the selected varieties. The growth characteristics of both above and below aerial parts in each year will continuously be monitored.