›› 2015, Vol. 42 ›› Issue (12): 3119-3125.doi: 10.16431/j.cnki.1671-7236.2015.12.002

Previous Articles     Next Articles

Cloning and Sequence Analysis of N and M Genes of Avian Infectious Bronchitis Virus Guangxi Strain

QU Su-jie, SHI Kai-chuang, SU Yan-qiong, HU Jie, MO Sheng-lan, ZHANG Bu-xian, LI Jun, ZOU Lian-bin   

  1. Guangxi Center for Animal Disease Control and Prevention, Nanning 530001, China
  • Received:2015-07-01 Online:2015-12-20 Published:2015-12-30

Abstract: To investigate genetic variation of avian infectious bronchitis virus (IBV) in Guangxi province,one strain of IBV was isolated from chicken.Two pairs of primers for amplifying the N and M genes of IBV were designed according to the sequences in GenBank.The N and M genes of the strain were amplified by RT-PCR,and they were proved to be the N and M genes of IBV by cloning,sequencing and compared with reference IBV strains published in GenBank.The results showed that the N gene from the IBV isolate consisted of 1 230 bp,coding 409 amino acids.The M gene from the IBV isolate consisted of 678 bp,coding 225 amino acids.The sequence analysis of N gene showed that it shared 87.2% to 93.3% nucleotide homologies and 90.0% to 94.4% deduced amino acid sequence homologies with IBV strains from GenBank.The M gene sequence analysis showed that it shared 83.6% to 91.0% nucleotide homologies and 82.7% to 92.9% deduced amino acid sequence homologies.The phylogenetic tree analysis showed that it was closely related to BJ and LX4 strains,and were clustered into one group;But with the distant relatives from other strains of IBV.These results suggested that the isolate was a new variant of IBV.

Key words: avian infectious bronchitis virus; N gene; M gene; gene clone; sequence analysis

CLC Number: