Abstract:

The objective of this study was to explore the genetic polymorphisms of Cathepsin D, L and their association with carcass traits. In this experiment, Genetic polymorphisms of the ctsd and ctsl Genes were studied by PCR-RFLE and analyzed their association with meat quality traits in Snow Dragon black cattle by SAS 9.2. The results showed that ctsd, c581t polymorphism had no associated with economic traits, ctsl, xma I polymorphism had significantly associated with sirloin triangle thickness (P<0.05), sirloin triangle thickness of AB genotype had significant difference with AA and BB genotype.