Half-sib analysis of three morphological traits in Drosophila melanogaster under poor nutrition
Half-sib analysis of three morphological traits in Drosophila melanogaster under poor nutrition
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DOI：
10.1111/j.1601-5223.2000.00059.x
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发表时间：
2000-01-01
期刊：
影响因子：
2.7
通讯作者：
Loeschcke, V
中科院分区：
文献类型：
--
作者：
Bubliy, OA;Imasheva, AG;Loeschcke, V
采用父系半同胞设计，研究了在应激和非应激环境中饲养的黑腹果蝇（Drosophila melanogaster）胸长、翅长和胸侧刚毛数的变化。培养基中的低浓度酵母被用作胁迫因子。胸长和翅长的表型变异在营养不良条件下高于对照;刚毛数的表型变异相对稳定，与环境无关。营养胁迫下各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，而刚毛数的遗传力变化则是由于应激导致遗传变异的减少。营养不良时胸长的遗传变异较大。翅长遗传方差在不同环境间无差异。
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.