Dissertation Research: The Potential for Gene Flow and Introgression into a Locally-adapted Population of Lobelia cardinalis

种群经常适应其本地环境，而这种适应可能会因为来自同一物种的不同非本地种群的基因的涌入而减弱。基因从园艺和恢复种植到野生植物种群的转移需要三个连续的阶段。首先，传粉者不得歧视非本地个体，因此不能将观赏和修复种植的花粉带入本地种群。其次，外地植物的花粉必须能够使野生种群的胚珠受精，即使在本地花粉的情况下也是如此。最后，由野生植物和园艺植物杂交产生的杂交后代必须在田间建立和维持自己。本研究以本地红花红花为材料，对上述各个阶段进行了研究。实验操作将测量花粉移动的距离，本地和非本地花粉在受精时的相对效率，以及连续几代杂交的表现。这篇博士论文研究了在实验环境中外地种群和野生种群杂交的所有步骤。这项工作的结果对保护具有重要意义，特别是关于本地物种与野生种群的恢复和园艺种植之间相互作用的可能性。

0073316GallowayPopulations frequently adapt to their local environment, and this adaptation may be diminished by the influx of genes from different, non-local populations of the same species. The movement of genes from horticultural and restoration plantings into wild plant populations requires three successive stages. First, pollinators must not discriminate against the non-local individuals and therefore move pollen from ornamental and restoration plantings into local populations. Secondly, the pollen of non-local plants must be able to fertilize the ovules of the wild population even in the presence of local pollen. Finally, the hybrid progeny resulting from a cross between wild and horticultural plants must establish and maintain themselves in the field. This study investigates each of these stages using the native cardinal flower, Lobelia cardinalis. Experimental manipulation will measure the distance of pollen movement, the relative efficiency of local and non-local pollen at fertilization, and the performance of successive generations of hybrids.This doctoral dissertation study addresses all steps of hybridization between non-local and wild populations in an experimental setting. The results of this work have implications for conservation, specifically for the potential for interactions between restoration and horticultural plantings of native species with wild populations.