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

论文研究：基因流动和渗入适应当地的半边莲种群的潜力

基本信息

批准号：
0073316
负责人：
Laura Galloway
金额：
$ 0.62万
依托单位：
University of Virginia Main Campus
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2000
资助国家：
美国
起止时间：
2000-05-15 至 2002-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0073316&HistoricalAwards=false
关键词：
Dissertation Research Potential Gene Flow

项目摘要

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.

0073316GallowayPopulation经常适应其本地环境，这种适应可能会因同一物种的不同，非本地种群的基因流入而减少。从园艺和恢复种植到野生植物种群的基因运动需要连续三个阶段。首先，传粉媒介不得歧视非本地个体，因此将花粉从观赏性和恢复种植林转移到当地人群中。其次，即使在局部花粉存在的情况下，非本地植物的花粉也必须能够施肥野生种群的胚珠。最后，由野生和园艺植物之间的十字架产生的杂种后代必须在田间建立并保持自己。这项研究使用天然红衣主教Cardinalis调查了每个阶段。实验性操纵将测量花粉运动的距离，受精时局部和非本地花粉的相对效率以及连续一代杂种的表现。这些博士学位论文研究涉及实验环境中非局部和野生种群之间杂交的所有步骤。这项工作的结果对保护具有影响，特别是对本地物种与野生种群的恢复与园艺种植之间相互作用的潜力。