Fig. 3

Maximum likelihood phylogenetic tree based on the ORF of the VP4 encoding gene segment. (A) P[4] genotype applying Tamura 3-parameter + invariable sites (T92 + I); (B) P[6] genotype applying Tamura 3-parameter + gamma distributed invariable sites (T92 + G + I) model. The study strains are indicated in red circles for MSD, black triangle for LSD and green squares for children without diarrhoea. Roman numerals indicate lineages. Only bootstrap values ≥ 70% are shown adjacent to each branch node. The Wa-like RVA strain from the USA was included as an out-group. Scale bars indicate the number of substitutions per nucleotide position.