[Y chromosomal factor controls transcription of autosomal fertility genes in Drosophila melanogaster males].

Transposition of the P[1ArB] vector was used to generate three mutations inducing sterility in homozygous males: ms(3)P50, ms(3)P122, and ms(3)P115 located within 67A4-B13, 92A2-14, and 75D regions on the polytene map. Staining for beta-galactosidase synthesized by P[1ArB] allowed us to study enhancer activity of these ms genes in the testicles. Their activity correlated to the presence of the YS arm but was little affected by the presence of YL arm of Y chromosome.