A novel SNP at the nucleotide 722 of coding sequence, which caused shift mutation, were detected using PCR-RFLP.This study was designed to investigate the effect of DQA on pig economic traits.

• 摘要采用PCR-RFLP方法对新发现的一引起氨基酸改变的SNP位点（读码框第722位碱基）进行了检测，初步探讨了DQA基因作为影响经济性状候选基因的可能性。