热带陆地草本植物中的物种丰富差异:来自Collabieae (兰花科) 的进化见解
Peng Zhou1, Ji-Hong Li2, Yi-Zhen Liu1
1Jiangxi Province Key Laboratory of Watershed Ecosystem Change and Biodiversity, Institute of Life Science and School of Life Sciences, Nanchang University, Nanchang, Jiangxi, China.
Molecular phylogenetics and evolution
|June 17, 2023
概括
热带兰花 (Collabieae) 起源于亚洲,并在全球范围内分散. 亚洲血统显示出更高的多样化率,可能是由于稳定,潮湿的气候和更长的殖民时期.
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 生物地理学 生物地理学
背景情况:
- 热带植物的物种丰富性在不同地区分布不均.
- 在物种多样性中这种空间异质性的驱动因素仍在争论中.
- 陆地兰花部落Collabieae (兰花科) 展示了亚洲的多样性和特有中心.
研究的目的:
- 研究Collabieae部落的生物地理历史和多样化模式.
- 了解导致Collabieae.ae.内物种丰富性区域差异的因素.
- 为了澄清塑造热带陆地植物多样性的进化过程.
主要方法:
- 用26个DNA区域对21个属和127种Collabieae.ae的26个DNA区域进行了家族遗传学重建.
- 使用宏观进化混合物的贝叶斯分析 (BAMM) 和地理状态物种化和灭绝 (GeoSSE) 模型进行生物地理推断.
- 使用实证和模拟数据,对Collabieae和区域血统之间的多样化率和利基演变进行比较分析.
主要成果:
- Collabieae起源于亚洲在早期的奥利古纪,并随后分散到非洲,中美洲和大洋洲通过长距离分散自米奥纪以来.
- 与非洲和大洋洲的血统相比,亚洲血统的净多元化率和利基进化率显著更高.
- 降雨被确定为一个关键的环境因素,亚洲的稳定和潮湿的气候条件可能会促进更高的多样化.
结论:
- 这项研究阐明了Collabieae部落的亚洲起源和随后的全球分散.
- 亚洲Collabieae中更高的多样化率归因于有利的气候条件和延长的殖民时期.
- 这些发现有助于理解热带陆地草本植物的区域多样性异质性.
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