Background : Considerable time and effort is required to develop new Panax ginseng varieties. Ginseng breeders have been developing techniques to shorten the breeding cycle to resolve this problem. In this study, we investigated the effects of adding GA3 and alternating temperature (AT, 2℃→ −2℃ → 2℃) on breaking bud dormancy in the varieties (Chungsun and Sunun) of ginseng root.
Methods and Results : The GA3 soaking treatment and AT were applied to one year old roots, which greatly accelerated the emergence of new buds. In one year old roots, new buds emerged from the 4th day post transplanting and after breaking dormancy with GA3 and AT treatments. The emergence of new buds was completed within two weeks. The rate of bud emergence for Chungsun was 60% - 98% over 15 - 60 days after the AT and GA3 treatments. The emergence rate of Sunun was 46% - 92%. Normal growth of the ginseng seedling was observed in spite of the early breaking of bud dormancy by combined GA3 and AT treatments.
Conclusions : GA3 and AT treatments shortened the dormancy period and facilitated the stable emergence of ginseng seedlings. However, some plants suffered deformities and early sprouting owing to the combined GA3 and AT treatments. Early sprouting was free from dormancy after leaf fall from the of aerial part of the plant.

서 언
 재료 및 방법
 결과 및 고찰
  1. GA3와 저온처리에 따른 묘삼의 출현
  2. GA3와 저온처리에 따른 묘삼의 생육
  3. GA3와 저온처리에 따른 기타 변화
 감사의 글
 REFERENCES

• 김동휘(농촌진흥청 국립원예특작과학원 인삼특작부) | Dong Hwi Kim Corresponding author
• 김영창(농촌진흥청 국립원예특작과학원 인삼특작부) | Young Chang Kim,
• 방경환(농촌진흥청 국립원예특작과학원 인삼특작부) | Kyong Hwan Bang
• 김장욱(농촌진흥청 국립원예특작과학원 인삼특작부) | Jang Uk Kim
• 이정우(농촌진흥청 국립원예특작과학원 인삼특작부) | Jung Woo Lee
• 조익현(농촌진흥청 국립원예특작과학원 인삼특작부) | Ick Hyun Cho
• 김영배(농촌진흥청 국립원예특작과학원 인삼특작부) | Young Bae Kim
• 손승우(농촌진흥청 국립원예특작과학원 인삼특작부) | Seung Woo Son
• 박종배(농촌진흥청 국립원예특작과학원 인삼특작부) | Jong Bae Park
• 김기홍(농촌진흥청 국립원예특작과학원 인삼특작부) | Kee Hong Kim