Polymorphism of porcine GSTM2 gene and its correlation analysis with production traits.

Litter size traits are important indicators to evaluate the benefit of pig farms and they also play a key role in porcine breeding.Glutathione-S-transferase mu subunit(glutathione S-transferase Mu2,GSTM2) gene is related to the immunization of sow reproductive system and its growth.In this study,PCR-SSCP was carried out to analyze the single nucleotide polymorphisms of GSTM2 gene and the effect of each polymorphic locus on the reproductive traits.The results showed that G2,G5 and G7 sites significantly affected the number of birth and alive;AB genotypes in all these three sites were the highest in the average total number of birth,which further verified the theory that the hybrid genotype is better than the homozygous genotype.All these three sites had no significant effect on the average weaning weight.G2 site had significant effect on the average birth weight.GSTM2 polymorphism and its correlation with litter size traits,birth weight and other production traits were analyzed in this study,by which we have got first-had material between genes and traits.