使用卷积神经网络的族群学和族群地理模型测试揭示了近期加拿大克莱尼亚 (Kleinia neriifolia) 中最近混合的历史
Mario Rincón Barrado1, Manolo Perez2, Tamara Villaverde1,3,4
1Department of Biodiversity and Conservation, Real Jardín Botánico (RJB), CSIC, Madrid, Spain.
Molecular ecology
|October 19, 2024
概括
多个岛屿特有 Kleinia neriifolia 殖民加拿大群岛的殖民始于特内里费. 机器学习模型揭示了随后的迁移和由干燥事件塑造的遗传混合.
科学领域:
- 进化生物学 进化生物学
- 岛屿生物地理 岛屿生物地理
- 人口遗传学 人口遗传学
背景情况:
- 多岛原住民 (MIE) 提供了对岛屿殖民和遗传过程的见解.
- Kleinia neriifolia,一个加拿大MIE,在西北非洲和整个撒哈拉沙漠有亲密的亲戚.
研究的目的:
- 推断Kleinia neriifolia及其亲属的遗传关系和分歧时间.
- 用种群遗传学和机器学习重建植物地理模式和遗传混合物.
主要方法:
- 用塑脱脂 (Hyb-Seq) 来对密集人口采样进行目标测序.
- 用种群遗传技术分析的多部位SNP核数据集.
- 机器学习 (卷积神经网络 - - CNNs) 用于植物地理模型测试.
主要成果:
- 遗传学分析确定了Kleinia anteuphorbium作为K. neriifolia的姐妹物种,在普略纪早期出现分歧.
- 在弥赛尼时期,从非洲之角/阿拉伯南部的克拉德发生了分离,支持气候替代.
- CNNs支持特内里费最初的殖民化,其次是岛屿到岛屿的迁移和东/西的语言地理分裂.
结论:
- CNNs有效地区分了复杂的岛屿移民和殖民化场景.
- 干旱事件可能导致了人口灭绝和重新殖民,解释了遗传混合模式.
- 这项研究阐明了关键的加拿大群岛特有的进化历史和殖民动态.
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