Abstract: G - banding,C - banding and Silver - staining techniques have been used to study the chromosomes of the Banna miniature pig. The relative length, centromere index and arm ratio of each individual chromosome were measured. The G - banding pattern of the chromosomes in the Banna miniature pig is similar to those of other domestic pigs. The sites of NORs were located on the chromosome 7 and 10 of the Banna miniature pig. The C - banding and Ag - NORs presented polymorphism. The C - banding pattern of the Banna miniature pig is similar to that of the Diannan small ear pig,but there are great differences in Ag -NORs between them.

Key words: Banna miniature pig, Chromosome, C-banding pattern, G-banding pattern, Ag-NORs