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兰花的起源和物种化

Oscar A Pérez-Escobar¹, Diego Bogarín^2,3, Natalia A S Przelomska^1,4

¹Royal Botanic Gardens, Kew, London, TW9 3AE, UK.

The New phytologist

|February 21, 2024

概括

兰花家族 (Orchidaceae) 起源于古老的劳拉西亚,而大多数现代物种的多样性是在过去的500万年里出现的. 中美洲被确定为最近,迅速的兰花物种化的关键热点.

科学领域:

植物学植物学
进化生物学进化生物学
人类遗传学是一个学科.

背景情况:

兰花系代表了主要的开花植物辐射,但它们的进化历史,全球分布和物种化热点仍然不清楚.
现有的植物地理分析缺乏全面的,最新的数据.

研究的目的:

使用组合的测序数据,构建一个强大的奥尔基达家族的系谱.
为了推断兰花的地理起源,范围演变和物种化模式.

主要方法:

使用高通量和桑格测序数据的综合类遗传学分析.
从"血管植物世界检查清单" (World Checklist of Vascular Plants) 中纳入精选的地理分布数据.
地理范围演变和物种化率的重建.

主要成果:

据估计,兰花最近的共同祖先存在于白纪晚期的劳拉西亚.
现代兰花物种的多样性在很大程度上起源于过去的500万年.
巴拿马和哥斯达黎加是最近物种化率最高的地区,中美洲是主要的多样化中心.

结论:

这些发现挑战了之前关于兰花在澳大利亚起源的假设.
兰花的多样化以古老的起源以及最近在中美洲的爆炸性物种化为特征.
这项研究为了解兰花的进化历史和生物地理学提供了新的框架.

关键词:

劳拉西亚地区的劳拉西亚.新热带药物新热带药物兰花科 (Orchidaceae) 是一个植物.高度的灭绝是高度的灭绝历史生物地理学历史生物地理学宏观演变的发生.

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