Phylogenetic relationships among Nashville, TN, rotaviruses, 2005 to 2013. ML trees assembled from nucleotide sequences of four genome segments (VP7, VP4, VP6, and VP1) for all VUMC NVSN rotavirus specimens with completely sequenced genomes are shown. Horizontal branch lengths are drawn to scale and represent substitutions per nucleotide. Internal genotype assignments are indicated on the right, and subgenotype allele assignments for segments other than VP7 are indicated by color. Bootstrap values at nodes defining genotypes or subgenotype alleles are shown as percentages. For a detailed ML tree for each genome segment, see Fig. S1.