将池级不确定性纳入人口统计推理中
João Carvalho1, Hernán E Morales2, Rui Faria3,4
1cE3c - Centre for Ecology, Evolution and Environmental Changes & CHANGE - Global Change and Sustainability Institute, Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Portugal.
Molecular ecology resources
|July 21, 2023
概括
我们开发了一种新的近似贝叶斯计算 (ABC) 方法,使用聚合序列 (Pool-seq) 数据重建进化历史. 这种方法解释了Pool-seq错误,使得可靠的人口推断和理解适应.
科学领域:
- 人口遗传学 人口遗传学
- 进化生物学是进化的生物学.
- 生物信息学是一种生物信息学.
背景情况:
- 聚合样本的下一代测序 (Pool-seq) 广泛用于人口多样性分析.
- 由于个人贡献不平等等因素,Pool-seq数据可能会很,这限制了其在进化历史重建中的使用.
- 现有的方法往往不能充分解决Pool-seq的特定错误源.
研究的目的:
- 开发一种新的近似贝叶斯计算 (ABC) 方法,从Pool-seq数据推断人口历史.
- 为了明确地建模和考虑Pool-seq数据中固有的噪声源.
- 评估Pool-seq数据在区分生态型形成的不同场景和推断人口参数方面的有用性.
主要方法:
- 开发了一种新的近似贝叶斯计算 (ABC) 方法,结合了Pool-seq错误模型.
- 共同建模的Pool-seq数据,人口史和选择效应.
- 采用了使用局部和相对统计数据/参数子集的计算效率高的模拟.
主要成果:
- 该ABC方法成功地从Pool-seq数据中推断出人口历史参数,并考虑技术错误.
- 模拟研究证实了Pool-seq数据能够区分生态型形成场景 (单个与并行起源).
- 适用于Littorina saxatilis的数据表明生态型差异早于本地殖民化,尽管基因流动仍存在.
结论:
- 使用 Pool-seq 数据与拟议的 ABC 方法进行人口建模和推断是可行的和可靠的.
- 该方法为了解自然种群适应的遗传基础提供了有价值的工具.
- 这项工作促进了对分析人口基因组学数据的零模型的开发,特别是来自聚合样本的数据.
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