The induction of regeneration and the maturation of the free-living gametophytes of Undaria pinnatifida were studied at temperatures (5, 10, 15 and 20℃), irradiance (5, 10, 20 and 40 μmol photons m-2 s-1) and photoperiods (14 : 10, 12 : 12 and 10 : 14 h L : D). Female gametophyte fragments were maintained in active regeneration without them reaching sexual maturity under conditions of 15℃, 20 μmol photons m-2 s-1, 10 : 14 h (L : D); by contrast, the conditions for male gametophytes were slightly different at 15℃, 5 μmol photons m-2 s-1, 14 : 10 h (L : D). The sexual maturation of female and male gametophytes took place under 5℃, 20-40 μmol photons m-2 s-1, 10 : 14 h (L : D) and 15℃, 40 μmol photons m-2 s-1, 10 : 14 h (L : D), respectively. These results provide basic information for controlling the regeneration and maturation of free-living gametophytes for srain improvement as well as the cross breeding of U. pinnatifida.

서 론
 재료 및 방 법
  1. 유주자 방출 및 배우체 분리
  2. 유리배우체 단편의 크기별 재생
  3. 유리배우체 단편의 생장 및 성숙
  4. 통계분석
 결 과
  1. 유리배우체의 분리 및 단편 크기별 재생
  2. 유리배우체 단편 크기별 재생
  3. 유리배우체 단편의 생장
  4. 유리배우체 단편의 성숙
 고 찰
 적 요
 REFERENCES

• 유현일(국립수산과학원 해조류연구센터, Seaweed Research Center, National Institute of Fisheries Science) | Hyun Il Yoo
• 김수홍(국립수산과학원 해조류연구센터, Seaweed Research Center, National Institute of Fisheries Science) | Su Hong Kim
• 이기현(국립수산과학원 해조류연구센터, Seaweed Research Center, National Institute of Fisheries Science) | Gi hyun Lee
• 하동수(국립수산과학원 해조류연구센터, Seaweed Research Center, National Institute of Fisheries Science) | Dong Soo Ha
• 황은경(국립수산과학원 해조류연구센터, Seaweed Research Center, National Institute of Fisheries Science) | Eun Kyoung Hwang Corresponding author