2.5. Sequence analysis
The phylogenetic dendrogram was constructed by comparing rotavirus sequences from various groups, including group A (from humans and animals), group D (chicken/05V0049/DEU/2005 [U733448]), group F (chicken/03V0568/DEU/2003 [HQ403603]), and group G (chicken/03V0567/DEU/2003 [HQ403604]). The analysis included the entire 742-bp sequence amplified by PCR, which corresponded to nucleotides 3-744 of the coding region of the VP6 gene, using the group D prototype sequence as a reference (Trojnar et al., 2010). The sequences obtained for the VP6 gene were aligned and edited using BioEdit (v.7.0.5.3), and the dendrogram was generated by MEGA 5 (v.5.05) using the neighbor-joining method and Kimura 2-parameter model (Kimura, 1980); the reliability was tested by a nonparametric bootstrap analysis with 2000 replicates