相关实验视频
Updated: Sep 12, 2025

09:45
Detection of Copy Number Alterations Using Single Cell Sequencing
Published on: February 17, 2017
11.8K
分段拷贝数放大在没有选择的情况下是稳定的
Titir De1, Nadav Ben Nun2,3, Pieter Spealman4
1Center for Genomics and Systems Biology, New York University, New York, NY, USA.
bioRxiv : the preprint server for biology
|August 8, 2025
概括
像基因放大一样的副本数变异 (CNV) 可以提供优势,但会产生成本. 大多数细分CNV在消除选择压力时是稳定和可逆的,显示低适应性缺陷.
科学领域:
- 进化生物学 进化生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 副本数变异 (CNVs) 是影响遗传变异和适应的DNA重复/删除.
- 在Saccharomyces cerevisiae的实验进化表明,在营养限制下,营养载体基因扩增的反复选择.
- 在去除选择压力后,这些CNV的稳定性和适应性成本以前是未知的.
研究的目的:
- 在回归非选择性条件后,研究Saccharomyces cerevisiae中CNV的稳定性和适应性成本.
- 为了确定细分放大和全染色体形变异的逆转动态.
- 了解CNVs在适应和基因组进化中的进化意义.
主要方法:
- 研究了15个独特的CNV谱系 (细分放大和动脉) 在限化疗状态中选择.
- 在富含营养的介质中使用光传递器系统在110-220代期间评估CNV稳定性.
- 进行双对竞争性健身测试和全基因组测序.
主要成果:
- 只有三分之一的CNV谱系恢复到单副本的基因型;形体呈现出快速的逆转,而细分放大是稳定的.
- 在营养丰富的环境中,CNVs发生了显著的健康缺陷,反转增加了健康状况.
- 反向消除了原来的CNV的所有证据,使基因组无法与祖先区分开来.
结论:
- 大多数细分CNV在去除选择压力后表现出低适应性成本和高稳定性.
- 基因放大与健身成本是容易可逆的,突出了CNVs在快速,短暂的适应中的作用.
- CNVs是基因组进化和适应潜力的重要驱动因素.
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