Production of Hybrid and Alotriploid between Rainbow Trout, Oncorhynchus mykiss and Cherry Salmon, O. masou I. Cytogenetic study

무지개송어, Oncorhynhus mykiss와 산천어, O. masou간의 잡종 및 잡종 3배체 생산 I. 세포유전학적 연구

  • 박인석 (군산대학교 해양자원육성학과) ;
  • 김치홍 (국립수산진흥원 부안수산종묘배양장) ;
  • 최경철 (부경대학교 양식학과) ;
  • 김동수 (부경대학교 양식학과)
  • Published : 1997.02.01

Abstract

Induction of hybrid and allotriploid between female rainbow trout, oncorhynchus mykiss and male cherry salmon, O. masou were performed. Triploid rate in allotriploid was 92% and the survival rates of allotriploid exceeded that of their hybrid counterparts. Karyological studies revealed that the hybrid had exactly the same intermediate diploid karyotypers as that of two parental species, while allotriploid had two sets of the maternal haploid complement and one set of the paternal haploid complement. Hybrid revealed an intermediate size in celluar and nuclear size of erythrocyte, while allotriploid revealed larger cellular and nuclear size of erythrocytes than hybrid. The number of nucleolar organizer regions of hybrid were 1 or 2, while those of allotriploids were 1, 2 or 3. These results proved that allotriploidization can lead to increase cytogenetical characters compared to counterpart hybridization.

무지개송어, Oncorhynchus mykiss 와 산천어, O. masou 간 잡종 및 잡종 3배체가 유도되었다. 잡종 3배체의 3배체 유도율은 92%로 유도된 잡종 3배체의 초기 생존율은 잡종에 비해 높게 나타났다. 잡종의 염색체수는 2n=63 이었으며 잡종 3배체의 염색체수는 3n=93으로 나타났다. 잡종은 적혈구 세포 및 핵 크기에서 잡종유도시 사용된 무지개송어, 산천어의 적혈구 세포 및 핵 크기의 중간치를 나타냈으며 잡종 3배체는 잡종에 비해 배수화에 기인되어 큰 적혈구 세포 및 핵 크기를 나타내었다. 이러한 배수화는 인형성부위 수에서도 나타나 잡종은 1개 혹은 2개의 인형성부위를 보인 반면 잡종 3배체는 1개, 2개 혹은 3개의 인형성부위를 나타내었다.

Keywords

References

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