人口历史塑造了北美灰狼的基因组多样性,并告知了物种的保护
Bridgett M vonHoldt1, Daniel R Stahler2, Kristin E Brzeski3
1Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, USA.
Molecular ecology
|December 6, 2023
概括
基因组数据揭示了北美三个不同的灰狼种群,其多样性和历史下降程度各不相同. 有效的种群规模估计强调了长期的灭绝风险,尽管恢复努力.
科学领域:
- 基因组学就是基因组学.
- 保护生物学 保护生物学
- 人口遗传学 人口遗传学
背景情况:
- 有效种群大小 (Ne) 对于进化预测和保护至关重要,特别是对于具有复杂社会结构或波动种群大小的物种.
- 北美灰狼 (Canis lupus) 面临着独特的挑战,原因是历史上的捕食者控制和不同的人口历史.
研究的目的:
- 为了估计北美灰狼的有效种群大小 (Ne),遗传多样性,种群结构和近亲繁殖.
- 评估灰狼种群与保护值相关的长期生存能力.
主要方法:
- 从1986年至2021年期间收集的437只灰狼样本中,对162,109个未过的和81,595个中性的SNP进行基因定型.
- 对北美不同地区的遗传结构,多样性和有效人口规模的分析.
主要成果:
- 识别了三种不同的人口历史的灰狼种群:北美西部,中部和东部.
- 较低的基因组多样性和历史人口下降观察到北方落基山灰狼与西部大湖群体相比.
- 实际人口规模估计 (Ne ≈2753050自20世纪80年代初以来) 表明灭绝努力的历史影响和目前的水平低于长期灭绝避免值.
结论:
- 基因组数据为北美各地灰狼种群动态和保护状况提供了关键的见解.
- 目前的有效种群规模表明短期避免近亲繁殖抑郁症,但长期存在灭绝的风险.
- 调查结果强调了有效的种群规模监测对于灰狼保护管理的重要性.
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