However, some of the codons in the CP genes that differentiate the three groups of WMV (KET, KEA, or KEKET) or in other genes may play an important role in the virus life cycle, such as encapsidation of the virion; interactions with the RNA genomes of the virus and host specificity for infection may not be under the selection pressure because the virus cannot afford any mutations in such conserved regions to be able to survive. This evidence concerns the gene CP and infection.