城市群岛的时间尺度上的人口历史
Emma K Howell1, Lauren E Nolfo-Clements2, Bret A Payseur1
1Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI, USA.
Genome biology and evolution
|March 20, 2025
概括
波士顿港老鼠的遗传变异揭示了古老的地质事件和最近的人类影响. 分析整个基因组提供了比以前更高的人口历史时间分辨率.
科学领域:
- 进化生物学是进化的生物学.
- 人口遗传学 人口遗传学
- 基因组学就是基因组学.
背景情况:
- 人口遗传变异反映了人口统计历史,包括分裂,迁移和尺寸变化.
- 目前用于重建人口历史的方法往往缺乏足够的时间分辨率.
- 城市化群岛为研究由于地质和当代变化的动态人口历史提供了独特的系统.
研究的目的:
- 使用全基因组序列推断波士顿港白足小鼠 (Peromyscus leucopus) 的人口史.
- 评估不同基因组变异总结的时间分辨率,以进行人口统计推断.
- 研究地质和最近人类因素对人口遗传结构的影响.
主要方法:
- 在Peromyscus leucopus种群中进行全基因组测序.
- 分析联合站点频谱 (jSFS) 以建模人口历史.
- 检查链接不平衡模式的研究.
- 调查罕见变种聚类和模拟最近的迁移.
主要成果:
- 基于jSFS的人口模型与波士顿港的地质历史一致.
- 链接不平衡模式表明最近的种群规模崩并没有被jSFS模型所捕获.
- 罕见的变种聚类表明最近的迁移,在jSFS模型中缺少但由模拟支持的模式.
结论:
- 城市群岛人口是由古老的地质过程和最近的人类影响形成的.
- 整合多个基因组变异模式可以提高人口历史重建的时间分辨率.
- 新的变化模式可以揭示传统方法错过的最近的人口统计事件.
相关概念视频
02:35What is Evolutionary History?
36.0K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
36.0K
01:50Global Climate Change
24.0K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.0K
00:30What are Populations and Communities?
33.6K
Overview
33.6K
02:07Conservation of Declining Populations
9.6K
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
9.6K
02:04Conservation of Small Populations
13.1K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
13.1K
01:29Life Histories
17.7K
Overview
17.7K