A preliminary study on chromosome preparation and karyotype

Abstract:

In order to protect the humphead wrasse Cheilinus undulatus (Ruppell, 1835）, an endangered species，the metaphase chromosome preparations of the live fish and its karyotype were studied in this paper. The metaphase chromosome was obtained from the fin and its healing-tissue of one-year old fish by hot air drying methods. The results showed that there were 48 chromosomes in diploid and their karyotype formulae was 2n=4M +10SM + 32ST +2T.Heterotypic sex chromosome was not found since the number of the tested fish was limited and all the young fish were physiologically female.