东亚和北美之间的断层关系以及Nepetinae (Lamiaceae) 亚族中的基因关系
Jeffrey P Rose1, Joshua Wiese2, Nicole Pauley3
1Department of Biology, University of Nebraska-Kearney, NE, Kearney, 68849, USA.
Molecular phylogenetics and evolution
|July 10, 2023
概括
这项研究揭示了薄荷家族 (Lamiaceae) 中的三种植物属表现出类似的东亚-北美断层,这些断层是由中新世纪晚期和新世纪早期来自东亚的单独迁移事件所驱动的,可能是由于代理人.
科学领域:
- 植物学 植物学
- 进化生物学 进化生物学
- 生物地理学是生物地理学.
背景情况:
- 生物地理断层,特别是洲际断层,在植物中很常见,并且长期以来一直吸引着生物学家的兴趣.
- 东亚-北美断层是一个经典的模式,通常归因于Arcto-Tertiary植物群的分裂.
研究的目的:
- 为了研究Nepetinae (Lamiaceae) 亚族的生物地理历史,该亚族具有三个属,与东亚-北美分离.
- 使用分子数据测试关于这些断层事件的节奏,起源和类型的假设.
主要方法:
- 用四个塑体和四个核标记物进行了家族遗传学分析.
- 差异时间估计和历史生物地理分析.
- 在Nepetinae.e.内主要基层的综合采样.
主要成果:
- 尽管存在一些细胞核不一致,但在不同基因组组中恢复了对Nepetinae的良好支持和一致的基因组.
- 三个研究的断层 (Agastache,Dracocephalum,Meehania) 是伪一致的,表明来自东亚的单向运动.
- 散布发生在稍微分阶段的时间,在中新世纪晚期和新世纪早期,与vicariance可能驱动大多数断层,除了可能的Meehania.
结论:
- 在Nepetinae中东亚-北美断层并不是古老的代理事件,而是最近的,来自东亚的分层分散.
- 代理人是阿加斯塔切和龙头的可能原因,而远距离的分散可能解释了米哈尼亚在北美的存在.
- 需要进一步的研究,以更深入的核取样和先进的模型来完全了解Meehania的生物地理.
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