在全球范围内,灌木柳 (Salix亚属Vetrix类) 的时空空间演变
Pia Marinček1, Jing Vir Leong2, Loic Pittet1
1Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Goettingen, Untere Karspüle 2, D-37073 Göttingen, Germany.
Molecular phylogenetics and evolution
|October 19, 2025
概括
灌木柳 (Salix亚属Vetrix) 在三级和普纪期间在亚洲多样化,物种化早于北极适应. 杂交和多重化进一步增加了这些hollarctic植物的多样性.
科学领域:
- 进化生物学是进化的生物学.
- 植物学 植物学
- 人类遗传学 是一个学科.
背景情况:
- 霍拉尔科特地区木质植物的时空进化是未被充分研究的.
- 在一些血统中,在更高的度处更高的多样性与度梯度假设相矛盾.
- 灌木柳 (Salix亚属Vetrix) 是霍拉尔克特生态系统的关键元素,有许多北极-高山适应物种.
研究的目的:
- 为了估计Salix亚属Vetrix类的时空进化.
- 了解推动Holarctic跨越灌木柳的多样性的进化过程.
- 为了研究灌木柳的起源和多样化模式.
主要方法:
- 使用RAD测序进行遗传学分析.
- 分析了大约140个物种,涵盖了主要的形态和地理多样性.
- 测定了基因谱的日期,以推断进化时间线.
主要成果:
- 已解决的分类学揭示了四个主要的血统:泛喜马拉雅,北美和两个欧亚类.
- 广泛分布的环极物种代表了欧亚和北美分类之间的混合遗传等级.
- 多样化与普世冷却相吻合,泛喜马拉雅和北美地区的辐射. 北极血统的特异化早于高度适应.
结论:
- 灌木可能起源于亚洲的三级时期.
- 物种形成受到了迁移,分散,地质事件和欧亚大陆息地扩张的影响.
- 杂交和多化显著促进了Salix亚属Vetrix的物种多样性.
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