在日露 (Drosera L.,Droseraceae) 血统中染色体数演变的速度有显著差异
Rebekah A Mohn1, Rosana Zenil-Ferguson2, Thilo A Krueger3
1Department of Plant and Microbial Biology, University of Minnesota-Twin Cities, St. Paul, MN, United States.
Evolution; international journal of organic evolution
|August 28, 2023
概括
染色体数量的变化推动了植物的物种化. 澳大利亚日 (Drosera亚属) Ergaleium) 的染色体变异率高于其他日的染色体变异率,独立于中心体类型.
科学领域:
- 植物生物学 植物生物学
- 进化生物学是进化的生物学.
- 遗传学 是一个遗传学.
背景情况:
- 染色体数量的变化是真核生物物种化的一个关键因素.
- 植物属Drosera (日) 呈现出显著的染色体数变异,特别是在澳大利亚物种 (Drosera亚属) 中. 埃尔加利乌姆 (Ergaleium) 的意思.
- 在Drosera中的非典型的中间体可能会影响染色体进化.
研究的目的:
- 为了研究Drosera的染色体数进化的速度.
- 为了比较Drosera亚种之间的染色体进化速率. Ergaleium 和其他亚属.
- 评估交配系统 (自我兼容性与自我不兼容性) 对染色体数量变化的影响.
主要方法:
- 对Drosera染色体计数的批判性文献综述.
- 细胞学数据的分类学验证和质量评估.
- 使用BiChrom模型进行遗传学重建和分析.
主要成果:
- 德罗塞拉亚分类. 与其他亚属相比,Ergaleium表现出更高的单染色体数量变化率.
- 染色体数的翻倍率在各个亚属中是相似的.
- 自我不兼容的血统表现出单个染色体损失率高于自相兼容的血统.
结论:
- 在Drosera的染色体数演变受到亚基因分歧的影响,其中Drosera亚基因. Ergaleium 经历了更频繁的单染色体变化.
- 交配系统,特别是自我不相容性,与染色体损失率的增加有关.
- 染色体数量变化,多倍体性或中间体类型之间没有发现任何关联.
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