Potential for adaptation, and its realization, in natural plant populations

自然植物种群的适应潜力及其实现

• 批准号: 1257462
• 负责人: Ruth Shaw
• 金额: $ 70万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1257462&HistoricalAwards=false
• 关键词: Potential; adaptation; its; realization; natural

The principles underlying the process of adaptive evolution are well established, and have been well tested in the laboratory and over short time periods in the field. However, we also know that the long-term rate of adaptation can be subject to additional processes. The primary objective of this research is to examine how a population's genetic variability affects the rate of adaptation over many generations, in the face of variation in environmental conditions and the depletion of that genetic variation by natural selection. Quantitative genetic experiments will be conducted in nature to assess potential and realized adaptation for three populations of the annual plant species, Chamaecrista fasciculata (partridge pea).This research will establish an empirical basis for predicting rates of ongoing adaptation. Beyond their fundamental importance, rates of adaptation are now of urgent societal importance in the context of rapidly changing climate. This research will inform policy and efforts directed toward conservation of natural populations. Moreover, the project will contribute to development of scientific capability by involving undergraduate, graduate and postdoctoral scholars, including members of groups underrepresented in STEM fields.

适应性进化过程的基本原理已经确立，并在实验室和现场的短时间内得到了很好的测试。然而，我们也知道，适应的长期速度可能会受到额外进程的影响。这项研究的主要目的是研究种群的遗传变异性如何影响世代适应的速度，面对环境条件的变化和自然选择对这种遗传变异的耗尽。定量遗传实验将在自然界中进行，以评估潜在的和已实现的适应三个种群的一年生植物，该研究将建立一个经验基础，以预测正在进行的适应速度。在气候迅速变化的背景下，适应速度除了其根本重要性外，现在还具有紧迫的社会重要性。这项研究将为旨在保护自然种群的政策和努力提供信息。此外，该项目将通过吸收本科生、研究生和博士后学者，包括在科学、技术和经济研究领域代表性不足的群体成员，促进科学能力的发展。