›› 2018, Vol. 45 ›› Issue (1): 140-146.doi: 10.16431/j.cnki.1671-7236.2018.01.018

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Polymorphism of PTGS2 Gene Exon 2 and Its Association Analysis with Reproductive Traits in Large White Pigs

NIE Guangwei1, LI Mingyang1, MAO Cui2, MAO Huimin2, WANG Guoshui2, ZUO Bo1   

  1. 1. Key Laboratory of Swine Genetics and Breeding, Ministry of Agriculture, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China;
    2. Zhejiang Tianpeng Group Co., Ltd., Jiangshan 324111, China
  • Received:2017-07-17 Online:2018-01-20 Published:2018-01-20

Abstract:

This study was aimed to investigate the association between single nucleotide polymorphisms (SNPs) of prostaglandin-endoperoxide synthase 2 (PTGS2) gene exon 2 and the reproductive traits in Large White pigs, which provided a method for the marker-assisted selection. DNA of American and France Large White sows were used to detect the single nucleotide mutation of PTGS2 gene by sequencing alignment, the genotype of polymorphic loci was identified by PCR-RFLP method, the association with reproductive traits in Large White pigs was analyzed. The results showed that a mutation site (g.86A>G) was found of PTGS2 gene exon 2, which changed MspⅠ restriction enzyme cutting site. Three genotypes of AA, AG and GG were detected in Large White pigs. The polymorphism distribution of PTGS2 gene g.86A>G fitted for the Hardy-Weinberg equilibrium in France Large White pigs (P>0.05). In American Large White pigs group, the number of weak piglets in primiparous sow with AA genotype was significantly lower than that of AG genotype (P<0.05), while the litter weight of multiparous sows with AA genotype was significantly higher than that of AG genotype (P<0.05). In France Large White pigs group, the total number born, number of strong piglets and litter weight of GG genotype were higher than those of AA and AG genotypes (P>0.05). The mutation site g.86A>G of PTGS2 gene exon 2 was significant association with the litter weight of multiparous sows and the number of weak piglets,so the polymorphic loci might be one of the candiate molecular markers used in pig breeding.

Key words: PTGS2 gene; Large White pigs; single nucleotide polymorphism (SNP); reproductive traits

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