GENETIC-DIVERGENCE UNDER UNIFORM SELECTION .1. SIMILARITY AMONG POPULATIONS OF DROSOPHILA-MELANOGASTER IN THEIR RESPONSES TO ARTIFICIAL SELECTION FOR MODIFIERS OF CID
GENETIC-DIVERGENCE UNDER UNIFORM SELECTION .1. SIMILARITY AMONG POPULATIONS OF DROSOPHILA-MELANOGASTER IN THEIR RESPONSES TO ARTIFICIAL SELECTION FOR MODIFIERS OF CID
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DOI：
10.2307/2408547
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发表时间：
1984-01-01
期刊：
影响因子：
3.3
通讯作者：
COHAN, FM
中科院分区：
文献类型：
--
作者：
COHAN, FM
设计了一个实验程序来调查两个种群在对相同的选择压力最可能的反应不同之前，它们必须有多远的亲缘关系。来自同一群体的选定品系比来自不同同种群体的品系更有可能通过相似的遗传变化进化，这一假设得到了检验。人工筛选了一种缩短黑腹金丝猴第4条纵脉的突变体--肘状突变体CID。对来自广泛分离群体的34个重复系进行了野生型表达的选择。然后，选择的线被用来测试来自该假设的5个预测。该实验没有提供证据表明黑腹隐翅虫种群对CID修饰剂的选择最有可能的反应是不同的。这些结果与其他研究结果形成了对比，这些研究表明，不同种群的黑腹果蝇对乙醇耐受性选择的反应以及胸膜硬毛数量存在差异。讨论了造成结果差异的可能原因。
An experimental program was designed to investigate how distantly related 2 populations must be before they are different in their most likely responses to the same selection pressure. The hypothesis that selected lines derived from the same population are more likely to evolve by similar genetic changes than lines derived from different conspecific populations was tested. Modifiers of expression of cubitus interruptus (ciD), a mutant which shortens the 4th longitudinal vein in D. melanogaster was artificially selected. Selection toward wild-type expression was performed in 34 replicate lines derived from widely separated populations. The selected lines were then used to test 5 predictions stemming from the hypothesis. The experiment provided no evidence that populations of D. melanogaster are different in their most likely responses to selection for ciD modifiers. These results are contrasted to other studies which demonstrated differences among populations of D. melanogaster in their responses to selection for ethanol tolerance; and sternopleural bristle number. Possible reasons for the differences in results are discussed.