基因组和遗传网络的重复及其在环境动荡期间进化适应和生存的潜力
Mehrshad Ebadi1,2, Quinten Bafort1,2, Eshchar Mizrachi3
1Department of Plant Biotechnology and Bioinformatics, Ghent University, Gent 9052, Belgium.
概括
全基因组复制 (WGD) 可以帮助生物适应环境变化. 复制的基因调节网络 (GRNs) 增加了变异性,使多倍体种群能够在动荡中幸存下来,并扩展到新的利基.
科学领域:
- 进化生物学是进化的生物学.
- 基因组学就是基因组学.
- 系统生物学 系统生物学
背景情况:
- 全基因组复制 (WGD) 在进化中的作用受到争议,有些人认为它对适应有害,有些人认为它对适应有益.
- 多化因其在环境变化,灭绝事件或压力条件下有助于生存的潜力而越来越受认可.
- 多倍体获得优势的确切机制,特别是有限异构的自多倍体,仍然不清楚,特别是短期利益.
研究的目的:
- 研究基因组复制如何影响进化适应性的机制基础.
- 在基因调控网络 (GRNs) 的背景下,探索WGD所赋予的短期选择性优势.
- 了解重复的GRN如何为利基扩张和在环境动荡下生存做出贡献.
主要方法:
- 人工生成的基因调节网络 (GRNs) 被重复,以模拟整个基因组的重复.
- 对重复和非重复的GRN之间的信号输出变化的比较分析.
- 在不同的环境条件下,评估GRN重复对人口水平优势的影响.
主要成果:
- 与非重复的GRN相比,重复的GRN的信号输出变化明显更高.
- 这种增加的变异性促进了利基扩张,为多种群提供了生存环境动荡的优势.
- 相反,重复的GRNs可以在稳定的环境中变得不适应,这种效应被放大.
结论:
- 通过重复的GRNs进行基因组重复,通过增加遗传变异和信号输出来增强适应性.
- 在环境不稳定和生态破坏期间,多体性可以赋予实质性的生存优势.
- 这些发现提供了关于WGD和多性如何促进快速适应新条件和灾难性事件期间的生存的见解.
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