ABDOMINAL PIGMENTATION AND GROWTH TEMPERATURE IN DROSOPHILA-MELANOGASTER - SIMILARITIES AND DIFFERENCES IN THE NORMS OF REACTION OF SUCCESSIVE SEGMENTS
ABDOMINAL PIGMENTATION AND GROWTH TEMPERATURE IN DROSOPHILA-MELANOGASTER - SIMILARITIES AND DIFFERENCES IN THE NORMS OF REACTION OF SUCCESSIVE SEGMENTS
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DOI：
10.1046/j.1420-9101.1990.3050429.x
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发表时间：
1990-09-01
影响因子：
2.1
通讯作者：
GAUTHIER, JP
中科院分区：
文献类型：
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作者：
DAVID, JR;CAPY, P;GAUTHIER, JP
在果蝇雌性中，腹部背片的色素沉着表现出很大的表型变异性，这取决于生长温度。通过在14 - 31 ℃的6个不同温度下饲养幼虫和蛹，使用同雌系在欧洲种群中研究了该性状的表型可塑性。C.对于最后三个腹部节段（5、6和7），当生长温度升高时，深色色素区域减少。然而，响应曲线的形状是显着不同的，如通过分析斜率变化所示，这表明基因相互作用不同，在调节连续片段的表型表达。此外，在两个温度下的同一条线的值之间的相关性表现出下降成比例的温度间隔考虑。通过计算组内相关系数t分析了品系间的遗传变异。该参数不受生长温度的影响，根据段，范围从0.40到0.54。如此高的数值表明非累加效应的比例很大。多变量分析有助于可视化线之间的反应规范的多样性。总体色素变化被认为具有适应意义，与成蝇的热平衡有关;另一方面，片段之间的差异可以反映发育限制，而没有直接的适应值。
In Drosophila melanogaster females, pigmentation of the abdominal tergites exhibits a large phenotypic variability which depends on growth temperature. The phenotypic plasticity of this trait was investigated in a European population using isofemale lines, by rearing the larvae and pupae at 6 different temperatures ranging from 14 to 31.degree. C. For the last three abdominal segments (5, 6 and 7), the dark pigmented area decreases when growth temperature increases. However, the shapes of the response curves are significantly different, as shown by analysing slope variations, suggesting that genes interact differently in regulating the phenotypic expression of successive segments. Also, the correlation between the values of the same line at two temperatures exhibited a decrease proportional to the temperature interval considered. Genetic variability between lines was analyzed by calculating the coefficient of intraclass correlation, t. This parameter was not influenced by growth temperature and according to the segment, ranged from 0.40 to 0.54. Such high values suggest a large proportion of non-additive effects. A multivariate analysis helped to visualize the diversity of the reaction norms among lines. Overall pigmentation variations are presumed to have an adaptive significance, related to the thermal balance of adult flies; on the other hand, the differences between segments could reflect developmental constraints without a direct adaptive value.