全球变异的评估 细分人口的有效大小,及其与其他有效大小的关系
Ola Hössjer1, Linda Laikre2, Nils Ryman2
1Division of Mathematical Statistics, Department of Mathematics, Stockholm University, 106 91, Stockholm, Sweden. ola@math.su.se.
Acta biotheoretica
|July 17, 2023
概括
本研究引入了新的方法来计算空间结构人口的全球方差有效人口大小. 对于物种的保护至关重要,最大限度地提高这种大小,发生在亚种群被其繁殖贡献加权时.
科学领域:
- 人口遗传学 人口遗传学
- 保护生物学 保护生物学
- 进化生物学 进化生物学
背景情况:
- 变异有效种群大小量化了随着时间的推移而变化的等位基因频率的速度.
- 了解这一指标对于物种保护和管理遗传多样性至关重要.
- 以前的模型经常简化了空间结构人口的复杂性.
研究的目的:
- 在空间结构化群体中导出全球方差有效人口大小的表达式.
- 确定对子种群的权重方案,以最大限度地提高这一全球有效大小,以实现保护目的.
- 开发新的,更稳定的变异有效人口大小版本.
主要方法:
- 对等位基因频率的分解,转化为亚种群内的遗传漂移和它们之间的迁移.
- 分析这些组成部分对亚种群权重,迁移率和地方规模的依赖.
- 开发新的逆向和经典版本的差异有效种群大小,以最佳的时间间隔估计.
主要成果:
- 当子群体按它们的长期生殖贡献进行加权时,metapopulation变异有效人口大小得到最大化.
- 这种最大大小接近基因多样性的有效大小,这是一个关键的保护指标.
- 提出了一个新的逆向版本的差异有效人口大小,证明了更大的稳定性和准确性.
结论:
- 在保护环境中,为了最大限度地提高全球有效人口规模,对子种群的最佳权重至关重要.
- 拟议的向后方差有效种群大小为多样化的种群提供了更强大,更准确的衡量标准.
- 通过优化时间间隔选择来测量遗传变化,可以准确估计有效种群大小.
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