Mitrofanov V G
Ontogenez. 1974;5(5):485-91.
The influence of temperature (17 and 31 degrees) on the maternal effect of mutation Puffed (Pu) in Drosophila hybrids has been studied. In the hybrids female D. littoralis +/+ x male D. virilis Pu/Pu, the stage of formation of black ring on anterior spiracles in the 3rd larval instar is sensitive to 31 degrees. In the hybrids female D. virilis Pu/Pu x male D. littoralis +/+, the expression of Pu gene manifests the maternal effect and as a result, two temperature-sensitive stages are found. The first one--onset of embryogenesis (2 to 4 hrs). At the temperature 17 degrees, the penetrance of Pu increases. The second stage is sensitive to 31 degrees and coincides with the period of black rings formation on anterior spiracles in the 3rd laval instar. It has been shown that at least two genetic systems take part in the formation of this feature. One group of genes controls the maternal effect and is sensitive to low temperature in the early embryogenesis of the hybrids female D. virilis x male D. littoralis. The second one--Pu gene and its modifiers--is active during the 2nd half of the 3rd larval instar and is heat-sensitive.
研究了温度（17摄氏度和31摄氏度）对果蝇杂交种中突变型鼓泡（Pu）母体效应的影响。在杂交种雌性海滨果蝇+/+×雄性粗壮果蝇Pu/Pu中，三龄幼虫前气门上黑环形成阶段对31摄氏度敏感。在杂交种雌性粗壮果蝇Pu/Pu×雄性海滨果蝇+/+中，Pu基因的表达表现出母体效应，结果发现了两个温度敏感阶段。第一个阶段——胚胎发生开始（2至4小时）。在17摄氏度的温度下，Pu的外显率增加。第二个阶段对31摄氏度敏感，与三龄幼虫前气门上黑环形成期一致。已经表明，至少有两个遗传系统参与了这一特征的形成。一组基因控制母体效应，在杂交种雌性粗壮果蝇×雄性海滨果蝇的早期胚胎发生中对低温敏感。另一组——Pu基因及其修饰基因——在三龄幼虫后半期活跃，对热敏感。
