Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Production of Induced Gynogenetic Diploid Bagrid Catfish Leiocassis ussuriensis (Siluriformes) - II. Viability, Early Growth and Sex Ratio of Gynogenetic Diploidy

대농갱이 Leiocassis ussuriensis (Siluriformes) 자성발생성 이배체 생산 - II. 자성발생성 이배체의 생존율, 초기 성장 및 성비 분석

  • Park, Sang-Yong (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Nam, Yoon-Kwon (Department of Aquaculture, Pukyong National University) ;
  • Bang, In-Chul (Department of Marine Biotechnology, Soonchunhyang University)
  • 박상용 (순천향대학교 해양생명공학과) ;
  • 남윤권 (부경대학교 양식학과) ;
  • 방인철 (순천향대학교 해양생명공학과)
  • Published : 2007.08.31
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Abstract

Viability, early growth and sex ratio of induced gynogenetic diploid bagrid catfish (Leiocassis ussuriensis, Siluriformes) were examined. Survival rates of gynogenetic diploids and normal bi-parental diploids up to 180 days post hatching were not significantly different (P>0.05), and consequently resulted the mean percent survivals of 76% (gynogens) and 78% (bi-parental progeny) at the end of growth trial. Growth in both body weight and total length of gynogenetic diploids was also similar to those of normal diploid controls (P>0.05). Gynogenetic bagrid catfish displayed a similar level of ovarian development when compared to bi-parental diploid females, as judged at 10 weeks post hatching. Sex ratio of bi-parental progeny was normal 1:1 whereas all-femaleness was observed in gynogenetic progeny (P<0.05), suggesting that the genetic sex determination mechanism of this species should be XX-XY based female homogamety.

대농갱이, Leiocassis ussuriensis의 유도된 자성발생성 이배체의 초기 생존율, 초기 성장 및 성비를 분석하였다. 대농갱이 자성발생성 이배체는 일반 대농갱이 이배체 대조군과 비교 시 부화 180일까지 생존 및 성장 형질에서 모두 차이를 나타내지 않았다(P>0.05). 자성발생성 이배체는 부화 10주째 암수 판별이 용이한 수준의 난모세포 발달 정도를 보였고 일반 대농갱이 암컷과 난소 발달에 있어 유사하였다. 부화 10주째 생식소 조직학적 분석 결과 일반 대농갱이 이배체 자손들은 1:1의 암수 비율을 나타낸 반면, 자성발생성 이배체 자손들은 모두 암컷으로 판별됨으로써 본 어종의 성 결정 기구는 XX-XY를 기본으로 하는 암컷 동형접합형인 것으로 나타났다.

Keywords

References

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