DISSERTATION RESEARCH: The Role of Interspecific Hybridization in Biological Invasions: An Experimental Study with Centaurea Maculosa and C. diffusa

论文研究：种间杂交在生物入侵中的作用：矢车菊和白花蛇舌草的实验研究

• 批准号: 0607974
• 负责人: Ruth Hufbauer
• 金额: $ 1.2万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607974&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Role; Interspecific; Hybridization

Hybridization between species has been hypothesized to lead to rapid adaptation to new environments. Many invasive organisms are hybrids, yet the role of hybridization in invasion is unclear. This research will test the hypothesis that hybridization increases the success of introduced species, allowing them to rapidly adapt to their new environment. The study examines the economically devastating noxious weeds Centaurea maculosa and C. diffusa and their hybrids. Using molecular and ecological approaches, the performance of the parental species and the hybrids will be compared to assess whether hybrids may be able to invade new habitats. Additionally, this research will evaluate the susceptibility of hybrids and their parent species to an introduced specialist biological control agent through preference and performance tests. This research has direct implications for land managers. For example, if hybrids are found to have higher performance, then hybrid populations can be targeted for control. In addition, the basic principles regarding invasion and hybridization can be applied to other systems. This grant funds the project of a female graduate student who is dedicated to being a positive role model to young women interested in science and is committed to disseminating the findings of the research.

物种之间的杂交被假设为导致对新环境的快速适应。许多入侵生物是杂交种，但杂交种在入侵中的作用尚不清楚。这项研究将检验这样一个假设，即杂交增加了引进物种的成功，使它们能够迅速适应新的环境。这项研究考察了经济上具有破坏性的有害杂草--斑点仙人掌和云杉及其杂交种。利用分子和生态学方法，将比较亲本物种和杂交种的表现，以评估杂交种是否能够入侵新的栖息地。此外，这项研究还将通过偏好和性能测试来评估杂交种及其亲本对引进的专业生防剂的敏感性。这项研究对土地管理者有直接的影响。例如，如果杂交种被发现具有更高的表现，那么杂交种群就可以成为控制的目标。此外，关于入侵和杂交的基本原理也可以应用于其他系统。这笔赠款资助了一名女研究生的项目，她致力于成为对科学感兴趣的年轻女性的积极榜样，并致力于传播研究结果。