Natural selection on protein polymorphism in the rodent genus Peromyscus: evidence from interlocus contrasts.
Natural selection on protein polymorphism in the rodent genus Peromyscus: evidence from interlocus contrasts.
复制标题
啮齿动物属白鼠属蛋白质多态性的自然选择：来自位点间对比的证据。
DOI：
10.1111/j.0014-3820.2003.tb01505.x
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Nachman,MichaelW
中科院分区：
文献类型：
--
作者：
Storz,JayF;Nachman,MichaelW
The effects of natural selection are generally locus‐specific, whereas migration, drift, and inbreeding are expected to have relatively uniform effects across the entire genome. This suggests that multilocus surveys of multiple populations can be used to distinguish selection from demographic effects. The purpose of this study was to test for evidence of selection on protein polymorphism in natural populations of mice in the genusPeromyscus. We analyzed published data from geographic surveys of allozyme variation and used a coalescent‐based simulation model to identify specific loci that deviated from neutral expectations. ObservedFSTvalues generally exhibited a remarkably close fit to the expected neutral distributions, indicating that the majority of loci are simply tracking stochastic demographic processes. A smaller number of loci exhibited highly significant departures from the expectations of the neutral model and thus appear to be tracking the direct or indirect effects of selection. Most departures from neutrality were characterized byFSTvalues that far exceeded neutral expectations and were therefore attributable to spatially varying selection. Interestingly, the albumin locus was implicated as a candidate gene for local adaptation in four different species ofPeromyscus. The results also demonstrate that selection can severely bias marker‐based estimates of neutral parameters.
