title: INTERFERENCE BETWEEN "SEX-RATIO" AGENTS OF DROSOPHILA WILLISTONI AND DROSOPHILA NEBULOSA.
abstract: Interference between two "sex-ratio" agents-that is, treponemalike spirochetes-of different origin, one from Drosophila willistoni and the other from D. nebulosa, was demonstrated by experiments in vivo and in vitro. When the two sex-ratio agents were combined in females of the Oregon-R strain of D. melanogaster, expression of the sex-ratio condition was temporarily interrupted. Several lines of evidence indicate that a substance produced by the sex-ratio agent of D. nebulosa may kill or incapacitate the sex-ratio agent of D. willistoni.
mesh_terms: D000818:Animals; D004330:Drosophila; D004331:Drosophila melanogaster; D005260:Female; D005823:Genetics; D009922:Oregon; D012106:Research; D012723:Sex; D012744:Sex Ratio; D013142:Spirochaeta
keywords: DROSOPHILA; EXPERIMENTAL LAB STUDY; GENETICS; SEX; SPIROCHAETA