ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (4): 859-864.doi: 10.11843/j.issn.0366-6964.2018.04.026

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Genetic Variations of S Gene of Porcine Epidemic Diarrhea Virus in Sourthern Henan Province from 2014 to 2015

DONG Jian-guo, WANG Rui, QU Zhe-hui, ZHAO Yu, LIU Tao*   

  1. College of Animal Husbandry and Veterinary, Xinyang Agriculture and Forestry University, Xinyang 464000, China
  • Received:2017-08-23 Online:2018-04-23 Published:2018-04-23

Abstract:

To investigate the variation of PEDV S gene in Henan province, specific primers were designed and synthesized, S genes of 38 PEDV strains from different pig farms in Henan provinces from 2014-2015 were amplified by RT-PCR, then cloned and sequenced. The phylogenetic relationships and protein characterization of the full-length PEDV S protein in Henan of China were analyzed with other PEDV reference strains. Phylogenetic analysis indicated that all the amplified S genes had a close relationship with some variant strains isolated from China and USA in recent years. Sequence alignment analysis showed that extensive amino acid (AA) insertion and deletion were found in the S protein. Furthermore, there were 11 AA deletion at the C terminal of S protein encoded by amplicated S gene. Many strains had wide AA substitution in the neutralizing epitopes COE and 2C10. These results will provide valuable research basis for understanding the variant characterization of PEDV and controlling the outbreak of PED in this area.

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