猪流行性腹泻病毒山西分离株S基因遗传变异分析

doi:10.16431/j.cnki.1671-7236.2017.07.012

Abstract

Abstract:

In order to investigate the variation in S gene of porcine epidemic diarrhea virus (PEDV), the 4 strains of PEDV S gene nucleotide sequences were obtained, through RT-PCR amplification of tissue samples from Shanxi province. The obtained sequences and the deduced amino acid were analyzed and compared with the other published PEDV strains. Sequence analysis showed that compared with CV777 vaccine, there were 12 nucleotides insertions between 170 to 171 bp, 3 nucleotides insertions between 401 to 402 and 454 to 455 bp, 6 nucleotides deletion between 461 to 468 bp. The nucleotide and amino acid homologies were 99.2% to 99.8% and 98.6% to 99.7% respectively among 4 strains of PEDV S gene; Comparing with the strains isolated from China in 2011 to 2015, CV777 vaccine, attenuated DR13 and CV777, the nucleotide homologies were 95.0% to 98.5%,93.2% to 93.6%,92.1% to 92.9%,93.7% to 94.4%,respectively.The amino acid homology were 96.2% to 98.9%,91.9% to 92.9%,91.9% to 92.6%,92.9% to 94.0%, respectively. Phylogenetic analysis revealed that 4 strains of PEDV S gene belonged to the first group and had high correlative genetic relationship with the PEDV strains which isolated after 2010 in China, and had far correlative genetic relationship with the PEDV strains which isolated before 2010 in China, 2 strains of Japanese, 7 strains of South Korea, 2 vaccine strains. The results suggested that the prevalence of PEDV in Shanxi province had a more obvious variation. Therefore, it was necessary to develop a new vaccine to control the outbreak of PEDV.

Key words: porcine epidemic diarrhea virus (PEDV); S gene; sequence analysis

CLC Number:

S858.28

LIU Wen-jun, YAO Jing-ming, WU Xin, MENG Fan, HAN Yi-chao, WANG Juan-ping, FAN Zhen-hua, XUE Yi-peng, MI Rui-juan, LI Hong-li, ZHAO Yue. Genetic Variation Analysis of S Gene of Porcine Epidemic Diarrhea Virus Isolated in Shanxi Provine[J]. , 2017, 44(7): 1982-1989.

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Genetic Variation Analysis of S Gene of Porcine Epidemic Diarrhea Virus Isolated in Shanxi Provine

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