The cytoplasmic polyhedrosis virus of the silkworm is the prototype of a large group of animal, plant, fungal and bacterial viruses that contain segmented double stranded RNA.

• 以双链核糖核酸为基因组的病毒寄主范围很广,如哺乳动物的呼肠病毒,昆虫的细胞质多角体病毒,植物的水稻矮缩病毒,以及某些微生物的病毒,已经发现有十余种之多。