Recent expansion of the non-recombining sex-linked region on Silene latifolia sex chromosomes.
Recent expansion of the non-recombining sex-linked region on Silene latifolia sex chromosomes.
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DOI：
10.1111/jeb.14063
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发表时间：
2022-12
影响因子：
2.1
通讯作者：
Filatov DA
中科院分区：
文献类型：
--
作者：
Filatov DA
Y（或W）染色体上的非重组性特异性区域（NRY）的进化是性染色体进化的关键步骤，但重组抑制如何进化还不清楚。对许多不同生物的研究表明，NRY的进化通常涉及几个扩展步骤。为什么这样的NRY扩张发生仍然不清楚，虽然它是，虽然他们可能是由性拮抗选择驱动。本文描述了一种雌雄异株植物宽叶蝇子草的性染色体上的假常染色体边界的移动所引起的NRY扩增。这种转变导致至少16个假常染色体基因被纳入NRY。该区域在近缘的异叶蝇子草和双列蝇子草中是假常染色体的，表明NRY扩增发生在S。latifolia后，它从其他物种形成约12万年前。作为S. latifolia和S. dioica在欧洲各地杂交活跃，种间基因流动可能会模糊这些物种的PAR边界。假常染色体基因具有显著升高的遗传多样性（在同义位点处π ~ 3%），这与在该区域中保持多样性的平衡选择一致。最近S. latifolia提供了一个研究NRY持续扩张过程的机会。宽叶蝇子草及其近缘种的拟常染色体边界的定位。 本文有Charlesworth的评论，https://onlinelibrary.wiley.com/doi/10.1111/jeb.14137
Evolution of a non‐recombining sex‐specific region on the Y (or W) chromosome (NRY) is a key step in sex chromosome evolution, but how recombination suppression evolves is not well understood. Studies in many different organisms indicated that NRY evolution often involves several expansion steps. Why such NRY expansions occur remains unclear, although it is though that they are likely driven by sexually antagonistic selection. This paper describes a recent NRY expansion due to shift of the pseudoautosomal boundary on the sex chromosomes of a dioecious plant Silene latifolia. The shift resulted in inclusion of at least 16 pseudoautosomal genes into the NRY. This region is pseudoautosomal in closely related Silene dioica and Silene diclinis, indicating that the NRY expansion occurred in S. latifolia after it speciated from the other species ~120 thousand years ago. As S. latifolia and S. dioica actively hybridise across Europe, interspecific gene flow could blur the PAR boundary in these species. The pseudoautosomal genes have significantly elevated genetic diversity (π ~ 3% at synonymous sites), which is consistent with balancing selection maintaining diversity in this region. The recent shift of the PAR boundary in S. latifolia offers an opportunity to study the process of on‐going NRY expansion. The location of the pseudoautosomal boundary in Silene latifolia and its close relatives. This article has a commentary by Charlesworth, https://onlinelibrary.wiley.com/doi/10.1111/jeb.14137
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影响因子：
1.9
作者：
BENGTSSON, BO;GOODFELLOW, PN
通讯作者：
GOODFELLOW, PN
DOI：
10.1098/rspb.1996.0062
发表时间：
1996-04-22
影响因子：
4.7
作者：
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通讯作者：
Gouyon, PH
影响因子：
18
作者：
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通讯作者：
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影响因子：
9.2
作者：
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通讯作者：
Filatov, Dmitry A.
影响因子：
13.6
作者：
El Taher A;Ronco F;Matschiner M;Salzburger W;Böhne A
通讯作者：
Böhne A