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. 2021 Feb 26;11:4797. doi: 10.1038/s41598-021-84189-7

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Phylogenetic tree based on the gp85 sequences of 71 ALV strains isolated in this study and 180 reference strains (162 ALV-J strains isolated from different flock and 18 ALV strains in subgroup A, B, C, D, E and J). The tree was constructed by the maximum likelihood method with 1000 bootstrap replicates using MEGA 5.0. The 71 ALV strains isolated in the study are shown with filled red circles, while other strains with different backgrounds are marked with different colored circles (specified in the figure).