Bubliy O A, Imasheva A G, Loeschcke V
Vavilov Institute of General Genetics, Moscow, Russia.
Hereditas. 2000;133(1):59-63. doi: 10.1111/j.1601-5223.2000.00059.x.
Variation in thorax length, wing length and sternopleural bristle number was examined in Drosophila melanogaster reared in stressful and nonstressful environments using paternal half-sib design. Low concentration of yeast in the medium was used as a stress factor. Phenotypic variation of thorax length and wing length was higher under poor nutrition than in the control; in bristle number, phenotypic variation was relatively stable regardless of the environment. Heritability of all the traits analyzed was generally lower under nutritional stress. Heritability changes in thorax length and wing length were mainly due to an increase in the environmental variance under stress, whereas in bristle number, stress resulted in a decrease in genetic variation. Genetic variance in thorax length was higher under poor nutrition; in wing length, no difference in genetic variance between environments was found.
使用父本半同胞设计,研究了在应激和非应激环境中饲养的黑腹果蝇的胸长、翅长和胸骨侧鬃毛数的变异情况。培养基中低浓度的酵母被用作应激因素。在营养不良的情况下,胸长和翅长的表型变异高于对照组;而在鬃毛数方面,无论环境如何,表型变异相对稳定。在营养应激下,所有分析性状的遗传力普遍较低。胸长和翅长的遗传力变化主要是由于应激下环境方差的增加,而在鬃毛数方面,应激导致遗传变异减少。在营养不良的情况下,胸长的遗传方差较高;在翅长方面,未发现不同环境之间遗传方差的差异。