检测黑腹果蝇体型渐变群中的不对称基因流动。
Testing for asymmetrical gene flow in a Drosophila melanogaster body-size cline.
作者信息
Kennington W Jason, Gockel Julia, Partridge Linda
机构信息
Department of Biology, University College London, London WC1E 2BT, United Kingdom.
出版信息
Genetics. 2003 Oct;165(2):667-73. doi: 10.1093/genetics/165.2.667.
Abstract
Asymmetrical gene flow is an important, but rarely examined genetic parameter. Here, we develop a new method for detecting departures from symmetrical migration between two populations using microsatellite data that are based on the difference in the proportion of private alleles. Application of this approach to data collected from wild-caught Drosophila melanogaster along a latitudinal body-size cline in eastern Australia revealed that asymmetrical gene flow could be detected, but was uncommon, nonlocalized, and occurred in both directions. We also show that, in contrast to the findings of a previous study, there is good evidence to suggest that the cline experiences significant levels of gene flow between populations.
摘要
不对称基因流是一个重要但很少被研究的遗传参数。在此，我们开发了一种新方法，利用基于私有等位基因比例差异的微卫星数据来检测两个种群间对称迁移的偏离情况。将此方法应用于从澳大利亚东部沿纬度体型渐变群采集的野生黑腹果蝇数据，结果表明可以检测到不对称基因流，但这种情况并不常见、无特定区域且双向发生。我们还表明，与之前一项研究的结果相反，有充分证据表明该渐变群在种群间经历了显著水平的基因流。
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