精确的分类学支持花的重复进化,作为对型豆类多样化的协同贡献者
Liming Cai1,2, Domingos Cardoso3,4, Lydia G Tressel1
1Department of Integrative Biology, University of Texas at Austin, Austin, TX, 78712, USA.
The New phytologist
|March 18, 2025
概括
豆科 (Fabaceae) 的基尔花在5900万年前进化,早于化石. 它们的多样化与多种创新有关,而不仅仅是授粉者相互作用.
科学领域:
- 进化生物学 进化生物学
- 植物科学 植物科学
- 生态生态学 生态生态学
背景情况:
- 蝶形的基花是血管精子中一个成功的花型.
- 基尔花被假设可以加速授粉者驱动的多样化,因为它们与蜜蜂的机械相互作用.
- Papilionoideae亚家族 (Fabaceae) 呈现出不稳定的基尔花的进化,使其成为研究多样化假设的理想选择.
研究的目的:
- 使用分子数据来解决Papilionoideae的早期分歧历史.
- 用时间树来评估 Fabales 中的节奏和多样化模式.
- 为了测试基尔花驱动受粉媒介多样化的假设.
主要方法:
- 对1456个低复制核位点进行了家族遗传学分析,以确定Papilionoideae.的骨干家族遗传学.
- 为3326个Fables物种构建一个时间树.
- 应用一个依赖状态的进化框架来分析多样化模式.
主要成果:
- 在Papilionoideae中,第一个花大约在5900万年前出现,比化石证据表明的稍早一些.
- 帕皮利诺伊代的苗代多样化与花的快速进化相关.
- 在Papilionoideae,Cercidoideae和Polygalaceae中,至少发现了6个独立的起源和32个花的消失.
结论:
- Papilionoideae中的多样化不仅仅是由与花相关的受粉媒介选择驱动的.
- 多种协同创新,包括固,化学防御和地理分散,可能有助于多样化.
- 国家依赖的多样化模式没有得到数据的支持.
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