Distorted sex ratios due to segregation distorter in Drosophila melanogaster.
Distorted sex ratios due to segregation distorter in Drosophila melanogaster.
复制标题
由于黑腹果蝇中的分离扭曲剂导致性别比例扭曲。
作者：
R. Denell;B. H. Judd;R. H. Richardson
温度对分离变形的影响：ERICKSON（1965）描述了温度对SD系统的影响。MANGE（1968）扩展了这种方法，他注意到高温（30°C）和低温（19 ° C）处理对各种SD系的恢复的影响。她利用SD-72以及“原始SD”染色体和重组衍生物从野生种群收集在下加利福尼亚。热休克导致在巴哈重组系的k降低，但对SD-72没有影响。在19°C下的处理导致在所检查的所有SD线中不同程度的失真减少。从育雏实验中，她得出结论，减数分裂是SD温度敏感的时间。因此，她的结果与上述工作不同，在上述工作中，冷休克导致SD-72的第二染色体畸变减少，但R（SD-S&）-I的畸变增加。感谢他对SD股票的慷慨贡献和有益的讨论。他们是SD。SD+本研究考察了SD-72/cn bzn和R（SD-36）-i/cn bw雄性后代中k（杂合子雄性将SD遗传给后代的频率）与性比之间的关系。接受SD+父本染色体的后代的性比（雄性比例）（cnbw性比）与各系雄性间的k值成正比，而接受SD父本染色体的后代的性比（SD性比）与k值无关。这一结果得到了SD-72线老化实验和温度冲击实验-SD的支持
The temperature effect on segregation distortion: ERICKSON (1 965) described a temperature effect on the SD system. This approach was extended by MANGE (1968), who noted an effect on recovery from various SD lines of both high (30°C) and low (19OC) temperature treatments. She utilized SD-72 as well as “original-SD” chromosomes and recombinant derivatives from a wild population collected in Baja California. Heat shock resulted in a lowering of k in the Baja recombinant lines, but had no effect on SD-72. Treatment at 19°C caused a decrease in distortion, of varying magnitude, in all SD lines examined. From brooding experiments she concluded that meiosis is the time of SD temperature sensitivity. Her results vary, then, from the work presented above in which cold shock causes a decrease in second chromosome distortion for SD-72, but an increase for R(SD-S&)-I. of Genetics, University of for his generous contributions of SD stocks and helpful discussions. The are SD. SD+ present study examines the relationship between k (the frequency with which a heterozygous male transmits SD to his progeny) and sex ratio in the progeny of SD-72/cn bzn and of R(SD-36)-i/cn bw males. The sex ratio (pro-portion of males) of progeny receiving the SD+ paternal chromosome (desig-nated the cn bw sex ratio) varies proportionally with the value of k among males of each line, while the sex ratio of progeny receiving the SD paternal chromosome (designated the SD sex ratio) is independent of k. This result is supported by an aging experiment with the SD-72 line and by temperature shock experi-SD