›› 2015, Vol. 42 ›› Issue (7): 1647-1653.doi: 10.16431/j.cnki.1671-7236.2015.07.004

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Infections Investigation of ALV and REV in Guangxi Local Poultry Breeds and Sequence Analysis of gp85 Gene of ALV Isolates

ZHONG Xing-fu1,2, WANG Pei-kun1, YANG Yong-li1, QIN Li-li1, BI Yu-yu1, ZOU Guang-zhen1, PENG Hao1, WEI Ping1   

  1. 1. Institute of Poultry Science and Health, Guangxi University, Nanning 530004, China;
    2. Shabu Aquatic Animal Husbandry and Veterinary Station of Qinnan District, Qinzhou 535000, China
  • Revised:2015-03-23 Online:2015-07-20 Published:2015-07-23

Abstract: In order to investigate the infection status of avian leukosis virus (ALV) and avian reticuloendotheliosis virus (REV) in the major local breeds of Qinzhou,Guangxi,totally 953 samples of egg white,cloaca swab and serum of Ma duck,Shitou goose,Tiejiao-Ma chicken,turkey and pigeon were collected from the representing flocks and detected by the commercial ELISA kits.ALV was isolated for the ALV p27 positive samples by culturing on DF-1 cells,and gp85 gene was sequenced.The results showed that the detections of ALV were negative in the samples except those of Tiejiao-Ma chicken,while REV antibody was found positive in Ma duck,Tiejiao-Ma chicken and turkey.The nucleotide sequences of gp85 gene of two isolates shared 94.5% identity with each other,and shared 86.9% to 94.9% with reference strains.The amino acid sequences of gp85 gene of two isolates shared 91.5% identity with each other,and shared 84.0% to 91.6% with reference strains.There were many variable sites in the hyper variable region hr1 and hr2,and the vr2 and vr3 variable regions were relatively conservative.Phylogenetic tree analysis showed that the two isolates shared the highest homology with SCAU11-XG strain.

Key words: avian; avian leukosis; avian reticuloendotheliosis; epidemiological survey; gp85 gene; phylogenetic tree analysis

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