title: Heritable translocation test and dominant-lethal assay in mice with methyl methanesulfonate.
abstract: A dominant-lethal test and a heritable translocation test were performed with methyl methanesulphonate (MMS) at 40 mg/kg by treating the sensitive periods of post-meiotic spermatogenesis i.e. spermatozoa and spermatids. In the dominant-lethal test 25 to 60% dominant-lethal mutations were obtained depending on the mating intervals. In the heritable translocation test 11% sterile and partially sterile F1 males were observed in 250 offspring of the MMS group. All of the 14 partially sterile and 6 of the 14 sterile F1 males were demonstrated to be translocation carriers. Fertility of the partial steriles was about 40% of normal fertility. The translocation frequencies in the primary spermatocytes of the partially sterile F1 males varied between 2 and 99%. Transmission of partial sterility and translocations was confirmed in the F2 generation. There were no partially sterile or sterile males among the 245 controls.
mesh_terms: D000818:Animals; D005298:Fertility; D005799:Genes, Dominant; D005804:Genes, Lethal; D005821:Genetic Techniques; D008297:Male; D008698:Mesylates / Q000494:pharmacology*; D008741:Methyl Methanesulfonate / Q000494:pharmacology*; D051379:Mice; D009153:Mutagens; D013091:Spermatogenesis / Q000187:drug effects; D013094:Spermatozoa / Q000187:drug effects*; D014178:Translocation, Genetic
chemical_list: D008698:Mesylates; D009153:Mutagens; D008741:Methyl Methanesulfonate