Increased selection response in larger populations. I. Selection for wing-tip height in Drosophila melanogaster at three population sizes.
Increased selection response in larger populations. I. Selection for wing-tip height in Drosophila melanogaster at three population sizes.
复制标题
在较大人群中增加选择反应。
DOI：
10.1093/genetics/125.3.579
复制
发表时间：
1990
期刊：
影响因子：
3.3
通讯作者：
Weber,KE
中科院分区：
文献类型：
--
作者：
Weber,KE
选择反应的人口规模的影响进行了研究与重复选择线的40，200和1000选定的父母，使用果蝇纯合子的突变体提出。选择增加翼尖高度进行了55代，平均选择强度为0.6标准差。7个株系的反应顺序与群体大小呈显著正相关，株系间的反应方差受群体大小的影响显著。三种处理的最终平均响应（选定-对照，+/-标准误差），按照群体大小递增的顺序，分别为8.6 +/- 1.8 mils（三条小线）、15.1 +/- 1.3 mils（两条中线）和19.8 +/- 1.5 mils（两条大线）。处理之间的差异似乎出现得太快，不可能是突变的结果，这可能主要是由于在较大的群体中通过选择以更高的效率利用了现有的变异。
The effect of population size on selection response was investigated with replicated selection lines of 40, 200 and 1000 selected parents, using Drosophila melanogaster homozygous for the mutant raised. Selection for increased wing-tip height was carried out for 55 generations, with an average selection intensity of 0.6 standard deviation. The rank order of responses in the seven individual lines was significantly in order of population size, and the variance of response among lines showed a significant effect of population size. The final mean responses (selected - controls, +/- standard errors) in the three treatments, in order of increasing population size, were 8.6 +/- 1.8 mils (three small lines), 15.1 +/- 1.3 mils (two medium lines), and 19.8 +/- 1.5 mils (two large lines). The differences between treatments seem to have emerged too rapidly to be the result of mutations, and are probably due mainly to the utilization of existing variation with greater efficiency by selection in larger populations.