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性染色体上的冲突:原因、影响及复杂性

Conflict on the sex chromosomes: cause, effect, and complexity.

作者信息

Mank Judith E, Hosken David J, Wedell Nina

机构信息

Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, United Kingdom.

Centre for Ecology & Conservation, University of Exeter, Cornwall, Tremough, Penryn TR10 9EZ, United Kingdom.

出版信息

Cold Spring Harb Perspect Biol. 2014 Oct 3;6(12):a017715. doi: 10.1101/cshperspect.a017715.

Abstract

Intralocus sexual conflict and intragenomic conflict both affect sex chromosome evolution and can in extreme cases even cause the complete turnover of sex chromosomes. Additionally, established sex chromosomes often become the focus of heightened conflict. This creates a tangled relationship between sex chromosomes and conflict with respect to cause and effect. To further complicate matters, sexual and intragenomic conflict may exacerbate one another and thereby further fuel sex chromosome change. Different magnitudes and foci of conflict offer potential explanations for lineage-specific variation in sex chromosome evolution and answer long-standing questions as to why some sex chromosomes are remarkably stable, whereas others show rapid rates of evolutionary change.

摘要

基因座内的性冲突和基因组内冲突都会影响性染色体的进化,在极端情况下甚至会导致性染色体的完全更替。此外,已确立的性染色体往往会成为加剧冲突的焦点。这就造成了性染色体与冲突在因果关系上的纠结。更复杂的是,性冲突和基因组内冲突可能会相互加剧,从而进一步推动性染色体的变化。不同程度和焦点的冲突为性染色体进化中的谱系特异性变异提供了潜在的解释,并回答了长期以来关于为什么有些性染色体非常稳定,而另一些则显示出快速进化变化速度的问题。

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