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ISSN : 1225-3480

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29권 2호

북방전복, Haliotis discus hannai 3배체의 생식능력

Maturity and Spawning of the Triploid Pacific Abalone, Haliotis discus hannai

지영주 (국립수산과학원 생명공학과)
남보혜 (국립수산과학원 생명공학과)
이정용 (국립수산과학원 연구기획과)
장영진 (부경대학교 해양바이오신소재학과)
한국패류학회지 / The Korean Journal of Malacology, (P)1225-3480;
2013, v.29 no.2, pp.105-111
https://doi.org/10.9710/kjm.2013.29.2.105
지영주, 남보혜, 이정용, & 장영진. (2013). 북방전복, Haliotis discus hannai 3배체의 생식능력. , 29(2), 105-111, https://doi.org/10.9710/kjm.2013.29.2.105

초록

참전복의 배수체별 생식소 조직 관찰에서 2배체 난소의 경우에는 성숙기를 거쳐 방출기로 들어가고 있는 상태이며, 2배체 정소의 경우에는 방출기의 상태였다, 이에 비해 3배체 전복의 생식소는 발달이 억제되어 난소는 성장기 혹은 성숙기의 상태이고, 정소는 성숙기의 단계에 머물고 있다. 따라서 전복은 완전한 불임이 되는 것은 아니고 어느 정도 성숙이 억제된다고 생각된다. 3배체 참전복의 산란 유발 실험에서 산란 유발에 반응한 개체는 2배체는 암수 전부 반응해서 100%의 산란 유발율을 나타냈고, 3배체는 암컷 50%, 수컷은 25%의 산란 유발율을 나타냈다. 산란된 알과 정자를 배수체별로 조사한 결과, 2배체의 정자는 장경 17.47 ${\mu}m$, 단경 11.40 ${\mu}m$ 및 정자의 길이 103.94 ${\mu}m$이었던 데 비해 3배체 정자는 장경 10.86 ${\mu}m$, 단경 8.47 ${\mu}m$ 및 정자의 길이 85.06 ${\mu}m$로서 2배체 정자가 3배체 정자보다 장경, 단경, 정자의 길이 모두에서 유의적으로 길었다 (P < 0.05). 알의 직경은 2배체가 199.50 ${\mu}m$, 3배체가 192.50 ${\mu}m$로서 2배체가 컸으나 유의한 차는 없었다 (P > 0.05). 배수체별 교배 실험에서 2배체 ${\times}$ 2배체는 정상적으로 수정되어서 발생을 했으나 2배체 알 ${\times}$ 3배체 정자와 3배체 알 ${\times}$ 2배체 정자의 경우에는 수정이 되지 않았다.

keywords
Pacific abalone, Triploid, Maturity, Spawning, fertilization

Abstract

The gonadal development of triploid and diploid Pacific abalones, Haliotis discus hannai was histologically investigated in spawning season. Diploid abalones had matured oocytes and spermatozoa, but most triploid had spermatocytes or developing oocytes that was slightly retarded in gonadal development compared to diploid abalones. In spawning experiment of triploid and diploid abalones, spawning rates of diploid male and female were 100%, but those of triploid female was 50% and male was 25% respectively. Investigation of spawned abalone eggs and spermatozoa revealed that length of diploid sperms head were 17.47 ${\mu}m$, breadth of head were 10.31 ${\mu}m$, length of spermatozoa were 130.72 ${\mu}m$, but those of triploid spermatozoa were 11.83 ${\mu}m$, 7.89 ${\mu}m$ and 103.36 ${\mu}m$ respectively. Triploid spermatozoa were significantly small to diploid spermatozoa (p < 0.05). The eggs of diploid and triploid were not different in size. The cross experiment between oocytes produced by triploids and spermatozoa by diploids ($3n{\times}2n$ cross) revealed that no fertilization were occurred, and $2n{\times}3n$ cross also revealed same result.

keywords
Pacific abalone, Triploid, Maturity, Spawning, fertilization

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