Among the virus of RTV, doctorfish iridovirus and largemouth bass ranavirus, the very different identity between MTase and MCP gene suggests that the gene used as target to estimate the evolution of the iridoviruses should be suitable.

• RTV、裂唇鱼病毒和大口黑鲈病毒之间MTase基因的一致性与衣壳蛋白基因的差异较大 ,说明同一种类的不同基因甚至同一基因的不同区域间演化速率不同 ,因此在虹彩病毒的演化研究中选择合适的基因或基因区域极为重要