Plant regeneration via organogenesis and somatic embryogenesis was investigated in Korean soybean cultivars including Cheongja 3, Jinpumkong 2, Taekwangkong and Uram. Cotyledon, cotyledon+hypocotyl and hypocotyl segments of 7-day-old seedlings were cultured on MS medium containing various concentration (0, 1, 2 and 4 ㎎/L) of BA and TDZ. The results showed that MS medium supplemented with BA 2.0 ㎎/L yielded the highest shoot formation ratio of 83.3%. In 4 cultivars, Taekwangkong showed the highest ratio of shoot formation. When various sizes of immature cotyledons (S: 1∼ 2 ㎜, M: 3∼5 ㎜, L: 6∼8 ㎜) were tested on MS medium containing 2,4-D 40 ㎎/L for somatic embryogenesis, the optimum size for embryogenic callus induction was 3∼5 ㎜ in length of immature cotyledons. In 4 cultivars, Taekwangkong showed the highest percentage of embryogenic callus induction. The results indicate that Taekwangkong is the best soybean cultivar for plant regeneration via organogenesis and embryogenic callus induction among the 4 cultivars.

• 김동건(순천대학교 대학원) | Dong-Gun Kim (Graduate School, Sunchon National University)
• 비파다 칸타요스(순천대학교 대학원) | Vipada Kantayos (Graduate School, Sunchon National University)
• 김동관(전남 농업기술원 식량작물연구소) | Dong-Kwan Kim (Institute of Agricultural Science and Technology, Jellaname-do Agricultural Research and Extension Services)
• 박흥규(전남 농업기술원 식량작물연구소) | Heung-Gyu Park (Institute of Agricultural Science and Technology, Jellaname-do Agricultural Research and Extension Services)
• 김행훈(순천대학교 웰빙자원학과) | Haeng-Hoon Kim (Department of Well-being Bioresources, Sunchon National University)
• 나의식(순천대학교 웰빙자원학과) | Eui-Shik Rha (Department of Well-being Bioresources, Sunchon National University)
• 이성춘(순천대학교 웰빙자원학과) | Sheong Chun Lee (Department of Well-being Bioresources, Sunchon National University)
• 배창휴(순천대학교 웰빙자원학과) | Chang-Hyu Bae (Department of Well-being Bioresources, Sunchon National University) Corresponding author