Investigating latitudinal clines for life history and stress resistance traits in Drosophila simulans from eastern Australia
Investigating latitudinal clines for life history and stress resistance traits in Drosophila simulans from eastern Australia
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DOI：
10.1111/j.1420-9101.2008.01617.x
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发表时间：
2008-11-01
影响因子：
2.1
通讯作者：
Sgro, C. M.
中科院分区：
文献类型：
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作者：
Arthur, A. L.;Weeks, A. R.;Sgro, C. M.
果蝇的许多数量性状都表现出垂直渐变，并被认为是由于气候选择。然而，临床研究经常在含有常见的世界性倒位多态性的果蝇中进行，这些倒位多态性也显示出临床模式。这些倒位多态性可能是负责许多观察到的倾斜变化。在这里，我们认为纬度倾斜的数量性状的果蝇模拟从澳大利亚东部。拟果蝇不包含世界性倒位多态性，因此允许研究数量性状的倾斜选择，而不受倒位关联的混淆。雌性和雄性的体型均表现出强烈的线性渐变。饥饿抗性表现出弱的线性渐变的女性，而寒冷昏迷恢复表现出显着的非线性渐变的女性。发育时间、雄性冷昏迷恢复、脱水或耐热性没有明显的倾斜模式。我们讨论了这些结果与参考的作用反转多态性在果蝇数量性状产生的倾斜。
Latitudinal clines have been demonstrated for many quantitative traits in Drosophila and are assumed to be due to climatic selection. However, clinal studies are often performed in species of Drosophila that contain common cosmopolitan inversion polymorphisms that also show clinal patterns. These inversion polymorphisms may be responsible for much of the observed clinal variation. Here, we consider latitudinal clines for quantitative traits in Drosophila simulans from eastern Australia. Drosophila simulans does not contain cosmopolitan inversion polymorphisms, so allows the study of clinal selection on quantitative traits that are not confounded by associations with inversions. Body size showed a strong linear cline for both females and males. Starvation resistance exhibited a weak linear cline in females, whereas chill-coma recovery exhibited a significant nonlinear cline in females only. No clinal pattern was evident for development time, male chill-coma recovery, desiccation or heat resistance. We discuss these results with reference to the role inversion polymorphisms play in generating clines in quantitative traits of Drosophila.