ショウジョウバエのdumpy座位におけるX線線量と誘発突然変異率との関係〔英文〕

概要

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A comparison was made of the frequency patterns for the different kinds of dumpy exceptions induced by X-rays in mature sperm of Drosophila.The results obtained indicate that (i) the yield of dumpy exceptions of the o and v types (complete) increases with exposure up to 3000R beyond which there is no further increase; (ii) the frequency of ol and vl exceptions (complete) tends to increase faster than linearly with no evidence for a decrease at 4500R; (iii) the exposurefrequency relationship for the ov and olv exceptions (complete) does not depart from linearity; (iv) the over-all frequencies of o, v, ol and vl (complete) at the three exposure levels are also consistent with a linear increase with exposures; (v) such a linear does-dependency is also observed on the yield of recovered mutations (complete) at the other marker loci, y, w, m and f; (vi) the frequency of fractional dumpy mutants appears to remain approximately the same irrespective of exposure. The present findings tend to suggest that the exposure-frequency relationships for the ifferent kinds of dumpy mutations are different.
日本遺伝学会の論文