3.5 │ The homology analysis of ALV-J strains in roosters, hens and albumens
The viruses isolated from roosters, hens, as well as albumens, show a homology between 94.1-99.7%, and are located in the same branch of the phylogenetic tree (Figure 2), which demonstrate that they are derived from the same source. The comparison of the gp85 sequence between semen and plasma sample of roosters shows that the nucleotide homology in most roosters (5/6) is more than 98.6%, but the other one (1/6) only has a homology of 96%, and its homology with that of the other 5 chicken is as low as 94.1%.