ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (5): 793-801.doi: 10.11843/j.issn.0366-6964.2017.05.002

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Study on SNP Identification, Selective Pressure and Association Analysis with Litter Size for ZP4 Gene in Pigs

LIANG Guo-ming1, CHEN Feng-jian2, ZHAO Qin-tao2, LIU Chen-hui2, TANG Zhong-lin1*   

  1. 1. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. College of Animal Science and Technology/College of Animal Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2016-12-26 Online:2017-05-23 Published:2017-05-23

Abstract:

In this study, we investigated the single nucleotide polymorphisms (SNP) of ZP4 gene, its selective pressure and association with litter size in pigs. Totally, 328 sows and their litter size records were collected from Large White, Landrace and Landrace×Large White hybridization pig populations. Direct sequencing method was used to clone and identify the nucleotide mutation in ZP4. The generalized linear regression model was applied to investigate the correlation between ZP4 SNP and litter size.The lositan software, Tajima's testing and Fu and Li's D testing were used to detect the selective pressure of ZP4. Our results demonstrated that 27 SNPs were detected in ZP4, and A268T was significantly correlated with number of total litter size in the 3 populations (P< 0.05). A268T was only significantly associated with number of born alive in Landrace and Large White pig populations (P<0.05). We also detected that T2950C was under positive selection and this mutation was linked with A268T. Our results suggested that A268T was a direct selection marker that could be used in pig marker assistant selection.

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