Abstract:

Simmental X Luxi are good double traits of milk and meat cattles. In order to explore the marker of some economic traits in early breeding and improve profit of beef industry. We choose the CTSB gene as candidate gene for carcass and growth traits, and a total of 174 Simmental X Luxi cattles were examined by PCR-RFLP of CTSB gene intron 6. Allele and genotype frequencies and the effects of the mutation on 4 growth and carcass traits were analyzed using SAS9.2. A T/C mutation was identified at position 5357 bp of CTSB gene(NC_007306). And it showed significantly association with average daily weight and meat weight (P<0.05). Genotype of AA is more weight on meat weight and average daily weight than AB and BB genotype. Thus T5357C might be a good marker for two traits.