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授粉者和息地介导的选择作为两种密切相关物种在生态物种化中的潜在贡献者

Diane R Campbell^1,2, John M Powers^1,2, Madison Crowell²

¹Department of Ecology and Evolutionary Biology, University of California, Irvine, CA, United States.

Evolution letters

|March 25, 2024

概括

授粉者介导的分离选择推动了植物的生态物种化. 这项研究发现,花特征,而不是植物性特征,是Ipomopsis物种分歧的关键驱动因素,突出了遗传变异的作用.

科学领域:

进化生物学进化生物学
生态生态学生态生态学
植物规格植物规格

背景情况:

当自然选择导致种群分离时,生态物种发生.
在开花植物中,分离选择可以通过授粉者或环境因素进行调解.
很少有研究通过检查花和植物性特征来严格测试这些机制.

研究的目的:

为了测试Ipomopsis.属中受粉媒介和环境媒介的分歧选择.
调查花和植物性质在生态物种化中的作用.
评估选择强度,幅和遗传变异之间的关系.

主要方法:

在父母和杂交Ipomopsis物种的原生地点利用了共同的花园.
分析了3种植物性特征 (特定的叶面积,叶子三角体,用水效率) 和5种花性特征 (冠状状体尺寸,插入,花颜色,花蜜产量).
评估的适应性成分:存活到开花和每朵花的种子.

主要成果:

花的特征显示,与I. tenuituba和I. aggregata地点之间的授粉成功相关的强差选择.
对于影响生存的植物性特征,没有发现显著的分歧选择.
混合区内的选择反映了I.聚合物遗址的选择;可变性,而不是选择强度,预测的斜坡宽度.

结论:

受粉媒介的分离选择在Ipomopsis的生态物种化中发挥着重要作用.
由授粉者驱动的花特征分歧是植物物种化的一个关键因素.
遗传变异 (可进化性) 对于确定跨混合区的分歧模式至关重要.

关键词:

克莱恩·克莱恩是什么意思不同的选择不同的选择.花的特征花的特征授粉授粉授粉授粉种类的变化种类的变化植物性特征植物性特征

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