鸡肾型传染性支气管炎病毒QD株S1基因的克隆与序列分析

Abstract

Abstract: One nephropathogenic infectious bronchitis virus （IBV） strain was isolated from Qingdao city, named as QD isolate.S1 gene of the strain was amplified, cloned and sequenced. The S1 gene of QD isolate was composed of 1620 nucleotides, and a spike glycoprotein cleavage recognition site was Arg-Arg-Phe-Arg-Arg. The nucleotide acid similarities among the nine IBV vaccine strains and the QD strain were 78.8% to 82.2%. Phylogenetic analysis based on the S1 genes showed that QD strain and the vaccine strains belonged to different clusters, and showed larger evolutionary distances, but showed the smaller evolutionary distances with the field nephropathogenic IBV strains in China. The result showed that nephropathogenic IBV strains were widely popular in China, and the QD strain could be used as the infectious bronchitis vaccine candidate strain.

Key words: infectious bronchitis virus; S1 gene; sequence analysis

SUN Mei-yu, CHEN Bing, XING Jing-min, WANG Shou-shan, LV Mao-jie, HE Zhao-qing,YANG Bao-shou. Cloning and Sequence Analysis of S1 Gene of Avian Nephropathogenic Infectious Bronchitis Virus QD Isolate[J]. .

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Cloning and Sequence Analysis of S1 Gene of Avian Nephropathogenic Infectious Bronchitis Virus QD Isolate

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