Lazebnyĭ O E, Imasheva A G, Zhivotovskiĭ L A
Genetika. 1990 Nov;26(11):1960-8.
The effects of interaction of artificial directional and stabilizing selection were studied using a recessive mutation of Drosophila melanogaster radius incompletus which causes interruption of the second longitudinal wing vein (L2). The character under directional selection was the length of the proximal segment of L2; stabilizing selection was conducted for a complex of morphometric wing characters. Three experimental designs in three replications were used: 1) directional and stabilizing selection; 2) directional selection; 3) unselected controls. The dynamics and variation of the character under directional selection was shown to be different in the stabilized and unstabilized lines. Coefficient of variation which increased in the unstabilized lines remained at the same level in the stabilized lines and in the controls. The results are in agreement with those of the previous experiment, where directional selection was conducted for a behavioral trait, which suggests general character of the relationships observed.
利用黑腹果蝇不完全半径的隐性突变来研究人工定向选择和稳定选择相互作用的影响，该突变会导致第二纵翅脉（L2）中断。定向选择的性状是L2近端节段的长度；对一系列翅形态测量性状进行稳定选择。采用了三种实验设计，每种设计重复三次：1）定向选择和稳定选择；2）定向选择；3）未选择的对照。结果表明，在稳定品系和不稳定品系中，定向选择性状的动态变化和变异情况有所不同。不稳定品系中增加的变异系数在稳定品系和对照中保持在相同水平。这些结果与之前针对行为性状进行定向选择的实验结果一致，这表明所观察到的关系具有普遍性。
