Catalase in Plodia interpunctella I. Genetic control and enzymatic patterns during development

Three electrophoretic patterns of catalase were demonstrated in the adults of the Indian Meal Moth Plodia interpunctella (Hüb) (Lepidoptera: Phycitidae). All the types gave only single bands of catalase activity, which were distinguishable on the gel by mobility. Evidence that the variation between these patterns is controlled by a single sex linked gene with two codominant alleles, was obtained from appropriate genetic crosses. The electrophoretic pattern during ontogenesis of the insect shows that the variation in the enzymic content undergoes progressive alteration, both qualitatively and quantitatively. © 1977 Dr W. Junk BV Publishers

Catalase in Plodia interpunctella II. Biochemical variation associated with an X-Y translocation

From electrophoretic ovidence of sex-linked inheritance of catalase in Plodia interpunctella it is suggested that the observed exceptional offspring are the result of an X-Y translocation which is proved to occur with a non negligible frequency. The rate of electrophoretically observed translocation was 1.8%. The existence of a Y chromosome in heterogametic females was proved by the finding of positive sex chromatin. The population sample examined was panmictic. The results favour the possibility that the translocation takes place randomly. © 1977 Dr W. Junk BV Publishers

Catalase in Plodia interpunctella II. Biochemical variation associated with an X-Y translocation

From electrophoretic ovidence of sex-linked inheritance of catalase in Plodia interpunctella it is suggested that the observed exceptional offspring are the result of an X-Y translocation which is proved to occur with a non negligible frequency. The rate of electrophoretically observed translocation was 1.8%. The existence of a Y chromosome in heterogametic females was proved by the finding of positive sex chromatin. The population sample examined was panmictic. The results favour the possibility that the translocation takes place randomly. © 1977 Dr W. Junk BV Publishers

Site of the yolk protein synthesis in D. silvestris

The yolk proteins from several Drosophila species were identified and partially purified. One or two predominant proteins were found in the crude extracts of mature oocytes and in the hemolymph of mature females. They were absent or present in trace amounts in male and young female hemolymph. Fat body from mature D. silvestris cultured in Grace's insect culture medium, synthesized and released several proteins, two of which were precipitable by antibodies against silvestris crude yolk extract. Fat body from immature flies synthesized and released only one of these proteins