POLYMORPHISM OF THE HEREDITARY SIGMA VIRUS IN NATURAL POPULATIONS OF DROSOPHILA MELANOGASTER

Annie Fleuriet ¹

¹ Laboratoire de Génétique, Université de Clermont Ferrand II B.P. 45, 63170 Aubière, France

Previous studies have shown that, in natural French populations of Drosophila melanogaster, 10 to 20% of the flies are infected by the noncontagious, hereditary rhabdovirus sigma responsible for CO₂ sensitivity. These populations are also polymorphic for two alleles [ref(2)P^o and ref(2)P^p] of a gene for resistance to the sigma virus. Evidence is given here that two viral genetic types, differing in their response to the ref(2)P^p allele, are present in these populations of flies; the most common type is only slightly sensitive to the ref(2)P^p allele.

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				A. Fleuriet Evolution of the Proportions of Two Sigma Viral Types in Experimental Populations of Drosophila melanogaster in the Absence of the Allele That Is Restrictive of Viral Multiplication Genetics, December 1, 1999; 153(4): 1799 - 1808. [Abstract] [Full Text]