title: [General transmission of sigma virus in "Drosophila melanogaster". II. - Revelation of late vertical tansmission in females which have acquired the virus only by the father spermatozoon (author's transl)].
abstract: This report concern work with Drosophila melanogaster females, which have only acquired the sigma virus strictly vertically through the father spermatozoon. After than the 20th day of life, most of these show an increased frequency of infected progeny. These results obtained provide evidence that the phenomenon is similar to the classical "passing over to germen", described in sigma-drosophila relationships. They confirm that germ-line infection in non-stabilized females can only occur during oogenesis. In these females, oogonia are never infected.
mesh_terms: D000818:Animals; D004331:Drosophila melanogaster / Q000254:growth & development / Q000382:microbiology*; D005260:Female; D005838:Genotype; D007304:Insect Viruses / Q000254:growth & development*; D008297:Male; D009866:Oogenesis; D012328:RNA Viruses; D013094:Spermatozoa / Q000382:microbiology*; D013696:Temperature
vernacular_title: Contribution a l'etude de l'infection de la lignée germinale femelle par le virus sigma chez Drosophila melanogaster. II. - Mise en evidnece d'un passage au germen tardif chez les femelles qui n'ont recu le virus que par le gamète paternel