Fig. 6

Collective phylogenetic tree based on LTR gene sequences alignment of REV comparable to other reference sequences in Genbank database. The phylogenetic analysis of the REV LTR gene showed that our REV three isolates located in subtype III (Sharquia-1-REV, Ismilia-2-REV, Mansoura-3-REV) with other Egyptian strains cluster in the same subtype. The REV three isolates in this study are identified by a triangle. The tree was constructed by the neighbor-joining method with 1,000 repeats bootstrap, using MEGA 7.0 software