Abstract
It is well known that the wing phenotype of vestigial and its alleles in Drosophila melanogaster varies under different environmental conditions, among which the effect of temperature is most remarkable. The differences of temperature-responses among vestigial alleles have been studied by many investigators, but those among different stocks of vestigial have not yet been well known. Recently Ogaki ('56) and Tanaka ('58) reported that the several Bar-eyed strains have shown marked differences in response to the facet-forming substances.
The present paper deals with the differences of temperature-responses among the five vestigial stocks of vg, vg (coiso), vg; e11 (coiso), B; vg; e11 (coiso) and vg; se. These strains vary in their sensitivity to temperature, that is, vg; se strain is most sensitive to high temperature (from 28°C to 30°C), thus the wing phenotype of this strain has reverted nearly to the wild type at 30°C in both sexes, however the remaining strains show only a slight response to the same temperature range.
Cross experiments seemed to reveal that some modifiers contained in the vg; se stock would accelerate the responses of wing expression at high temperature.
