Comparative study on DNA contents of five cultured fishes of Acipenseridae and Huso

Yin HB. Sun ZW. Sun DJ.

Employing flow cytometry Partec Pas III (made in Germany), we measured somatic cell DNA contents of five fishes consisting of A. gueldenstaedti Brandt, A. baeri Brandt, A. schrencki Brandt, A. ruthenus Linnaeus and A. dauricus| Georhi, based on standard DNA content 2.3 pg/N of the chicken red blood cell (RBC). The results demonstrated that the DNA contents of A. gueldenstaedti, A. baeri and A. schrencki are very close, which are 12.24 pg/N, ll.60 pg/N and ll.59 pg/N respectively, whereas the DNA contents of A. ruthenus and H. dauricus were only 6.06 pg/N and 4.77 pg/N. There are no slightly significant differences between them. However, the DNA contents of the former three fishes described are twice higher than those of the latter two fishes. Finally, we determined the former three fishes belong to octoploid and the latter two fishes belong to tetraploid according to the results obtained and the documents published.