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人类 X 染色体与常染色体多样性的比例与基因的遗传距离呈正相关。

The ratio of human X chromosome to autosome diversity is positively correlated with genetic distance from genes.

机构信息

Arizona Research Laboratories, Division of Biotechnology, University of Arizona, Tucson, Arizona, USA.

出版信息

Nat Genet. 2010 Oct;42(10):830-1. doi: 10.1038/ng.651. Epub 2010 Aug 29.

DOI:10.1038/ng.651
PMID:20802480
Abstract

The ratio of X-linked to autosomal diversity was estimated from an analysis of six human genome sequences and found to deviate from the expected value of 0.75. However, the direction of this deviation depends on whether a particular sequence is close to or far from the nearest gene. This pattern may be explained by stronger locally acting selection on X-linked genes compared with autosomal genes, combined with larger effective population sizes for females than for males.

摘要

从对 6 个人类基因组序列的分析中估计了 X 连锁与常染色体多样性的比例,发现其偏离了 0.75 的预期值。然而,这种偏差的方向取决于特定序列是靠近还是远离最近的基因。这种模式可以用 X 连锁基因比常染色体基因受到更强的局部作用选择来解释,同时女性的有效种群大小大于男性。

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本文引用的文献

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Recombination rates may affect the ratio of X to autosomal noncoding polymorphism in African populations of Drosophila melanogaster.重组率可能会影响非洲黑腹果蝇种群中X染色体与常染色体非编码多态性的比例。
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Accelerated genetic drift on chromosome X during the human dispersal out of Africa.
氨基酸改变变体之间的负连锁不平衡揭示了人类基因组中有害突变之间的干扰。
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How Good Are Predictions of the Effects of Selective Sweeps on Levels of Neutral Diversity?选择性清除对中性多样性水平的影响预测有多准确?
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Changes in life history and population size can explain the relative neutral diversity levels on X and autosomes in extant human populations.生活史和种群大小的变化可以解释现存人类群体中 X 染色体和常染色体上相对中性多样性水平的差异。
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Life History Effects on Neutral Diversity Levels of Autosomes and Sex Chromosomes.生活史效应对常染色体和性染色体中性多样性水平的影响。
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Complex patterns of sex-biased demography in canines.犬科动物中存在复杂的性别偏倚的种群动态模式。
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