关键词: 水貂, 核型, 带型

Abstract: The chromosomes of mink(Mustela vision) had been studied by several banding techniques(C-banding, silver staining and late replication banding). The results are given as below: The diploid number of the mink is 30. Autosomes consist of 5 pairs of metacentrics, 8 pairs of submetacentrics and 1 pair of acrocentrics. Chromosome No.8 has a clear secondary constriction on the short arm. X chromosome is a metacentric and its size is almost as the same as Chromosome No.11 The C-bands of the mink chromosomes are mainly restricted to the centromeric regions. Chromosomes Nos.2,3,4,7and 8 have large C-bands, extending from the centromere to both arms. The heterochromatin of X chromosome is more abundant than that of autosomes. But the C-band of centromere region of chromosome No.5 is small and stained slightly. There are three Ag-NORs in the silver-stained karyotype, one pair of them are located at the secondary constriction of chromosome No.8,the other one is located at the long arm of chromosome No.2, which is only one chromosome with Ag-NORs.

Key words: mink(Mustela vision), Karyotype, banding patterns