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Updated: Mar 14, 2026

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循环性染色体的循环性染色体的循环性染色体的循环性循环性循环性染色体的循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环性循环

Yuàn Wang¹, Zhi-Qing Xue¹, Ren-Gang Zhang²

¹Key Laboratory of East China Plant Conservation and Utilization, National Forestry and Grassland Administration, Shanghai Chenshan Botanical Garden, Shanghai, 201602, China.

|March 13, 2026

概括

在 Salix 中的性染色体进化涉及基因重复和重排. 新证据表明,W染色体上的PISTILLATA基因复制抑制了男性特征,推动了性染色体的周转.

科学领域:

植物遗传学植物遗传学
进化生物学是进化的生物学.
性别的确定性性别的确定性

背景情况:

性染色体转换可以通过基因重复或替代发生.
Salix (柳) 呈现XY和ZW两种性别确定系统,在各种染色体上有性别相关区域 (SLR).
在XY Salix中,男性决定性基因是ARR17复制物,通过小RNAs调节茎发育.

研究的目的:

为了研究 Salix.的性别染色体周转的遗传机制.
在 Salix 种类中分析 ZW 系统从 XY 系统的演变.
为了确定参与Salix.的性别决定的基因和调控元素.

主要方法:

用ZW系统生成了三种Salix物种的分阶段染色体组件.
在ZW和XY Salix中分析与性别相关的区域 (SLR).
从SLR中检测RNA产物,并研究基因表达.

主要成果:

在 Salix 中的 ZW SLR 位于与 XY SLR 相同的中心周区域.
虽然ARR17复制物存在,但RNA产物很少.
在反向重复中,W-链接的PISTILLATA (PI) 基因复制物产生小的干扰RNA,准自体PI基因,抑制其表达.

结论:

在ZW Salix中,性染色体循环涉及ARR17和PI重复在很少重组的周心层区域.
在W染色体上的PI重复作为男性性抑制因素.
在周心区域的罕见重组促进了 Salix 性染色体的显著进化变化.

关键词:

Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix Salix 周中心流域 (pericentromeric) 的区域.再组合的景观重新组合.性染色体的营业额翻了一番性别的确定性性别的确定性转移转移转移转移转移

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