Capy P, Chakrani F, Lemeunier F, Hartl D L, David J R
Laboratoire de Biologie et Génétique Evolutives, CNRS, Gif/Yvette, France.
Proc Biol Sci. 1990 Oct 22;242(1303):57-60. doi: 10.1098/rspb.1990.0103.
The occurrence of active, or autonomous, mariner elements was investigated by crossing white-peach mutant Drosophila simulans females with wild-type males from various geographic origins. From a total of 194 experimental crosses only 17 failed to produce progeny with eye mosaicism (MOS, i.e. pigmented spots in otherwise white-peach eyes). Therefore, active mariner elements inducing somatic excision of the copy inserted at the white locus are abundant in all populations sampled. In the experimental crosses the frequency of mosaic offspring ranged from 0 to 100%, showing that the phenotypic expression is highly variable. The MOS phenotype, measured by the number of spots on the eyes, is quite variable within the progeny of single crosses. Although a difference was observed in the average MOS score (percentage of mosaic flies) between northern and southern populations of France, there was no indication of long range variation between geographic populations. Neither was there a systematic difference between recently collected populations and samples kept several years as isofemale lines.
通过将白桃突变型拟果蝇雌性与来自不同地理区域的野生型雄性杂交，研究了活性（或自主）水手元件的出现情况。在总共194次实验杂交中，只有17次未能产生具有眼嵌合体（MOS，即在原本白桃色眼睛中出现色素斑点）的后代。因此，在所有采样群体中，诱导插入白色位点的拷贝进行体细胞切除的活性水手元件都很丰富。在实验杂交中，嵌合后代的频率范围为0%至100%，表明表型表达高度可变。通过眼睛上的斑点数量来衡量的MOS表型，在单个杂交的后代中变化很大。虽然在法国北部和南部群体之间观察到平均MOS评分（嵌合果蝇的百分比）存在差异，但没有迹象表明地理群体之间存在远距离变异。最近收集的群体与作为同雌系保存数年的样本之间也没有系统差异。
