Figure 4

Phylogenetic trees of genome segments of the BF cluster. HXB2 positions delimiting the analyzed segments are indicated on top of the trees. Sequence names of viruses of the BF cluster are in blue. Names of subtype references are preceded by the corresponding subtype. Node supports of B and F1 clades are indicated, in this order, as ultrafast bootstrap value/aLRT SH-like support/posterior probability, which were obtained with IQ-Tree, PhyML, and MrBayes programs, respectively. For the other nodes, only ultrafast bootstrap values are indicated. Only bootstrap values ≥ 80%, aLRT SH-like values ≥ 0.9, and posterior probabilities ≥ 0.9 are shown.