Figure 3
From: High codon adaptation in citrus tristeza virus to its citrus host
Codon usage variations of CTV genotypes. (A) NJ phylogenetic tree of CTV constructed using the entire coding region. The yellowing and stem-pitting CTV group is colored in blue, the trifoliate orange resistance breaking CTV group is colored in purple, and the quick declining CTV group is colored in yellow. (B) Distributions of CTV codon usage variation along the first and second axes based on the COA analysis. Coordinates of the three CTV groups are colored in the same way as that shown in Figure 3A.