短期的波动和长期的不同选择对交配的花:从跨越十年的相互移植的见解
Caroline M Dong1,2, Bolívar Aponte Rolón1, Juj K Sullivan1
1Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA.
bioRxiv : the preprint server for biology
|July 9, 2024
概括
选择的时间变化可能会扰乱对象物种的局部适应. 然而,长期研究表明,尽管短期波动,在开花时间上的选择可能会加强花的物种界限.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 植物科学 植物科学
背景情况:
- 相似的物种往往表现出当地适应不同微生物息地.
- 时间环境变化,特别是极端气候事件,可能导致偶发性选择,可能导致局部不适应和物种边界侵蚀.
研究的目的:
- 为了研究不同利基适应的同情花物种 (Mimulus guttatus和M. laciniatus) 的进化轨迹.
- 通过重复的相互移植实验,分析短期和长期自然选择模式之间的相互作用.
主要方法:
- 在10年内进行了三次重复的互换移植实验,将数据与以前的研究结合起来.
- 在原生息地对母体和杂交花种群进行了表型选择分析.
- 检查了横跨多年的选择模式,在约塞米蒂国家公园的雪地条件显著不同.
主要成果:
- 在表型选择中观察到跨年波动,其中一些方向是不可预测的.
- 在分析跨多年的数据时检测到在花期的长期分歧选择,这表明物种界限的潜在加强.
- 发现了局部适应的时间变化;M. laciniatus在低积雪年份局部适应,而M. guttatus在极高积雪年份经历了不良适应.
结论:
- 尽管短期的波动和不可预测的选择,长期的分离选择在开花时间可以加强对应的花之间的物种界限.
- 环境的变化,如雪地上的差异,影响了当地适应,突出了物种相互作用和进化轨迹的动态性.
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