Phylogenetic analysis of the of ALV-J isolates based on nucleotide sequences of the whole-genome and the gag, pol, gp85, and gp37 genes. (A) Whole-genome; (B) GAG; (C) POL; (D) GP85; (E) GP37. ▪ ALV-J isolated from our lab; ▲ ALV-J isolated from Chinese Yellow-chicken;▪ ALV-J isolated from White-feather broilers; ▪ ALV-J isolated from layer chickens; ▪ALV-J isolated from Gallus gallus; ▪ ALV-J isolated from wild birds. The phylogenetic tree was constructed by using the neighbor-joining method based on nucleotide alignment with the Maximum Composite Likelihood Model with 1,000 bootstrap replicates using the software MEGA X 10.1.7. Abbreviation: ALV-J, avian leukosis virus subgroup J.