Figure 2

Phylogenic trees of the σC (a) and part of the σB (b) genes of Tunisian ARV strains. The trees were generated on the base of nucleotides sequences using splits tree phylogenic software (version 4.10) with distance-based neighbour-joining (NJ). The reliability of the trees was assessed by bootstrap analysis with 1.000 replications; only bootstrap values of > 90% are shown. The length of the horizontal lines is proportional to the minimum number of nucleotide differences required to join nodes. The vertical lines are spacing branches and labels. The scale bar is proportional to the phylogenic distance (Table 2).