Figure 1From: Analysis of whole genome sequences of 16 strains of rubella virus from the United States, 1961–2009Phylogenetic tree of the 30 viruses. The first 21 nts were deleted from the sequence alignment due to a gap in one sequence. Baysian Information Criterion (BIC) scores for different models were computed using the MEGA 5.05 program with the default settings. TN93 with a proportional discrete Gamma distribution (+G) and a fraction of invariant sites (+I), was selected as best fitted model with the lowest BIC scores. The transition/transversion bias for TN93 + G + I model was estimated to be 6.85, using MEGA 5.05 under the Kimura 2-parameter model. The maximum likelihood tree constructed by MEGA 5.05 program with default settings and TN93 + G + I model is shown.Back to article page