Fleuriet A
Arch Virol. 1982;73(2):121-33. doi: 10.1007/BF01314721.
The experiments reported in this paper deal with the maintenance of the non contagious, hereditary virus sigma in populations of its host, Drosophila melanogaster. Evidence was previously provided of the existence of two viral Types I and II, depending on their sensitivity to the ref(2)Pp allele (the ref(2)P locus interferes with the multiplication of the virus in the fly). The viral Type I which is the most sensitive to the ref(2)Pp allele, is eliminated in the presence of this allele, even when most of the flies were originally infected in the population. On the contrary, the presence of the ref(2)Pp allele does not prevent a viral Type II, introduced in a population, from infecting most of the flies. The possibility that a change has occurred recently in French natural populations of Drosophila melanogaster is discussed.
本文所报道的实验涉及非传染性遗传病毒西格玛在其宿主黑腹果蝇种群中的维持情况。先前已有证据表明存在两种病毒类型I和II，这取决于它们对ref(2)Pp等位基因的敏感性（ref(2)P基因座会干扰病毒在果蝇体内的繁殖）。对ref(2)Pp等位基因最敏感的病毒类型I，在该等位基因存在时会被清除，即使种群中的大多数果蝇最初已被感染。相反，ref(2)Pp等位基因的存在并不妨碍引入种群中的病毒类型II感染大多数果蝇。文中还讨论了法国黑腹果蝇自然种群中最近是否发生了变化的可能性。
