Inheritance of Radioresistance in Drosophila. II. Radioresistance and Maternal Effect in the Early Embryonic Stage

概要

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Susceptibility to X-rays in early embryos of the bw; st ss strain in Drosophila melanogaster was higher than that of the Hikone-H, Mino-H and 1, 3-Hikone; bw strains, which shows a striking parallelism in the radiation effect exists between the embryonic stage and adult stages. The susceptibility in egg stages varied as the embryonic development advanced. The difference of the susceptibility to X-rays between the radioresistant and the radiosensitive strains was seen in the embryos of one, three and five hours old, but not seen in nine hours old. What is meant by the dose effect curves indicative of embryonal mortality seem to differ not only quantitatively but also qualitatively after five and nine hours after egg laying. Reciprocal crosses between the sensitive and the resistant strains showed that the radiosensitivity in early embryonic stages of Drosophila seemed to depend largely upon the characteristics of thefemale parents. Thus, the maternal effect was observed in early embryonic stages but no cytoplasmic or maternal effect was seen in later embryonic stages.
大阪府立大学の論文
1974-03-31