社会结构对有效人口规模变化的影响 估计 社会结构对有效人口规模变化的影响
Bárbara Ribeiro Parreira1,2, Shyam Gopalakrishnan1, Lounès Chikhi2,3,4
1Center for Evolutionary Hologenomics Globe Institute, University of Copenhagen Copenhagen Denmark.
Evolutionary applications
|January 16, 2025
概括
种类中的社会结构可以产生误导性关于种群大小变化的信号,掩盖真实的人口统计事件. 研究人员建议在推断有效人口大小 (Ne) 和使用结构化人口数据验证方法时谨慎行事.
科学领域:
- 人口遗传学 人口遗传学
- 进化生物学 进化生物学
- 保护遗传学 保护遗传学
背景情况:
- 目前用于推断物种人口历史的方法通常假定人口结构可以忽略不计.
- 脊椎动物种群经常被组织成社会群体,这在基因数据解释中经常被忽视的因素.
- 忽视社会结构可能会导致关于人口规模变化的不准确结论.
研究的目的:
- 研究社会结构如何影响有效人口规模 (Ne) 和人口统计历史的估计.
- 模拟各种交配系统下的结构化种群的微卫星数据,以评估人口推断方法.
- 评估社会结构对BOTTLENECK和msvar.等方法的影响.
主要方法:
- 对具有社会细分和不同的交配系统 (一夫多妻制,多妻制,多妻制) 的物种进行微观卫星数据的模拟.
- 估计有效人口规模 (Ne) 和量化社会结构对Ne的影响.
- 分析使用BOTTLENECK测试突变漂移平衡和msvar量化和日期Ne变化.
主要成果:
- 社会结构可以产生偏离突变漂移平衡的错误信号,包括明显的人口扩张和瓶.
- 扩张信号甚至可以出现在具有低遗传多样性的简单模型中.
- 虚假的扩张信号可以掩盖真正的人口规模波动和瓶事件.
结论:
- 基于遗传数据的人口推断方法应该仔细考虑和纳入人口结构.
- 反映社会结构的模拟数据对于验证人口推理工具至关重要.
- 来自社会结构的误导性信号给保护工作带来了重大挑战,尤其是危物种.
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