Using PCR-RFLP, the polymorphism of CAST gene in five pig populations (total of 110 pigs), were analysed, and the relationship between the CAST genotypes and pork quality and backfat was evaluated.

• 采用PCR-RFLP技术，分析了CAST基因在5个实验群体110头猪中的多态性分布及其与肉质性状和背膘厚间的相关。