›› 2017, Vol. 44 ›› Issue (10): 3042-3048.doi: 10.16431/j.cnki.1671-7236.2017.10.030

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Cloning and Sequence Analysis of Hexon Gene of Duck Adenovirus A

WAN Chun-he, LIU Rong-chang, CHEN Cui-teng, CHENG Long-fei, FU Guang-hua, FU Qiu-ling, SHI Shao-hua, CHEN Hong-mei, HUANG Yu   

  1. Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fujian Animal Diseases Control Technology Development Center, Institute of Animal Husbandry and Veterinary Medicine of Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
  • Received:2017-04-17 Online:2017-10-20 Published:2017-10-20

Abstract:

In order to clarify the characteristics of the Hexon gene and the classification candidate of duck adenovirus A under the Adenoviridae family, the Hexon gene fragments of duck adenovirus A (designated as strain JX2016) were amplified. The results demonstrated that the cloned Hexon gene of duck adenovirus A (strain JX2016) was 2 733 bp in length, coding 910 amino acids. Nucleotide homology comparison showed that the strain JX2016 shared the highest nucleotide (99.8%) homology with reference strain FJ12025, also displayed higher than 99.4% nucleotide homology with other duck adenovirus A reference strains. However, the nucleotide homologies with strain GR (duck adenovirus 2, unclassified virus), Phelps (fowl adenovirus A) and P29 (goose adenovirus) were 54.5%, 53.6% and 55.2%, respectively. The genetic evolution analysis showed that all the duck adenovirus A strains were at the same subgroup, under the same Atadenovirus genus branch with ovine atadenovirus D (strain OAV287). Meanwhile, the duck adenovirus 2 (strain GR) at the same branch under Aviadenovirus genus branch with fowl adenovirus A (strain Phelps) and goose adenovirus (strain P29). Based on the Hexon protein genetic evolution analysis, we suggested renamed the duck adenovirus A as duck-origin atadenovirus and renamed the duck adenovirus 2 as duck-origin aviadenovirus.

Key words: duck adenovirus A; Hexon gene; sequence analysis; genetic evolution; classification

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