Research Article

First Report and Genetic Characterization of Border Disease Virus in Sheep from Hulunbuir, Northeastern China

Figure 4

Differences between nonsynonymous and synonymous (dN−dS) rates across the polyprotein-coding region of border disease virus (BDV), bovine viral diarrhea virus type 1 (BVDV-1), and classical swine fever virus (CSFV). The rates dN−dS > 0 indicate a positively selected site, while dN−dS < 0 indicates a negatively selected site.