ショウジョウバエの変異と環境VIII. : 暗黒生活581代の中でみられたキイロショウジョウバエDrosophila melanogasterの行動の変化(2)

概要

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The previous conclusion that a change in the photic reactions in a hereditary one was reconfirmed by executing two kinds of experiments. Flies reared in total darkness for 81 generations were brought back to normal daylight conditions (D → L ilies)and tested for the following 117 generations. D → L ilies of three independent strains showed the same results, that is, a more vigorous reaction (phototaxis and photokinesis)to sudden illumination thah L flies (the flies kept under normal daylight condition)during 117 generations under reverted daylight condition. In the second experiment, D flies, having been kept in total darkness for 123 generations, were crossed with L flies, and F_1 flies Were tested. The degree of vigorousness of reaction to sudden illumination(phototaxis and phototakinesis) of (L × L) F_1flies was the smallest among the four kinds of F flies (the other three crosses were L × D, D × L, D × D). These experiments were performed using three independent straing, showing largely similar results. The experiments reported previously and in this paper show that the observed variations of behavior were of a hereditary nature, and were brought about in close connection with the environmental changes.
社団法人日本動物学会の論文
1983-06-25