Early Survival and Karyotype of Backcross Bullhead Hybrid between Pseudobagrus fulvidraco Female and P. fulvidraco $\times$ Leiocassis ussuriensis Hybrid Male

동자개 Pseudobagrus fulvidraco 암컷과 동자개 P. fulvidraco $\times$ 대농갱이 Leiocassis ussuriensis 잡종 수컷간 역교배체의 초기 생존을 및 염색체 핵형

  • Park, Sang-Yong (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Kang, Eun-Jong (Southern Regional Inland Fisheries Research Institute, NFRDI) ;
  • Nam, Yoon-Kwon (Department of Aquaculture, Pukyong National University) ;
  • Bang, In-Chul (Department of Marine Biotechnology, Soonchunhyang University)
  • 박상용 (순천향대학교 해양생명공학과) ;
  • 강언종 (국립수산과학원 남부내수면연구소) ;
  • 남윤권 (부경대학교 양식학과) ;
  • 방인철 (순천향대학교 해양생명공학과)
  • Published : 2009.02.25

Abstract

Backcross hybridization between Korean bullhead Pseudobagrus fulvidraco female and Korean bullhead P. fulvidraco $\times$ Ussurian bullhead Leiocassis ussuriensis hybrid male was performed, and early viability and karyotype of the backcross hybrids were examined along with their parental species. Mean fertilization rate (86.8%), hatching success (70.7%) and early survival rate (76.4%) of backcross hybrids were similar with those found in the maternal species, the Korean bullhead. From the chromosome analysis, modal chromosome numbers of Korean bullhead, Ussurian bullhead, their hybrid and backcross hybrid were the same as 2n = 52. However, their karyotypes were different among genotypes. The karyotype of backcross hybrid was 22 metacentric + 18 submetacentacentric + 12 acrocentric chromosomes.

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