Karyotypes Analysis for Three Species of Tetraodontiformes Fishes

The karyotypes of three species of Tetraodontiformes fishes were analyzed. The PHA and colchicine were injected in vivo,and kidney cells were collected and treated with lower osmotic pressure and air-drying technique. The results showed that these three marine species had diploid chromosome karyotypes,and all did not contain satellite chromosome,secondary constrictions and sex chromosome. The karyotype formula were as follows: the karyotype of Monacanthus chinensis was 2n = 34,34t,NF = 34; the karyotype of Takifugu xanthopterus was 2n = 44,12m + 8sm + 24t,NF = 64; and the karyotype of T. rubripes was 2n = 44,14m + 6sm + 24t,NF = 64; We also compared the karyotypes of the related fishes in the order of Tetraodontiformes.