DISSERTATION RESEARCH: Evolutionary genetics of physiological variation in Ipomopsis aggregata: identifying QTL and measuring ecological selection in different environments

论文研究： Ipomopsis aggregata 生理变异的进化遗传学：识别 QTL 并测量不同环境中的生态选择

• 批准号: 0910333
• 负责人: Thomas Juenger
• 金额: $ 1.5万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-05-15 至 2011-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0910333&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Evolutionary; genetics; physiological

The efficiency with which plants use water during photosynthesis is a critical physiological trait that determines where plants can survive and how well they grow and reproduce. This research integrates genetic and ecological approaches to understand the evolution of water use and related physiological traits in Ipomopsis aggregata, a wildflower native to the United States. This project will investigate 1) the number of genes that control water use and related physiological traits; 2) patterns of natural selection in environments that differ in water availability; and 3) how the environment has shaped differences among populations in traits that affect water use. Genotype and physiological trait data from large field experiments will be used for genetic mapping of traits and measurements of selection. To assess population genetic variation, genotype and climatic data will be collected from natural populations across the range of I. aggregata. This project will elucidate the genetic basis of important physiological traits in plants, and show how differences in these traits may evolve. This work will also provide data on the stresses plants experience in different climates and environments. Therefore, results will be useful for predicting the effects of climate change on plants. Additionally, this project will provide research opportunities for undergraduates including minorities, and stimulate collaborations among institutions and researchers in different fields of biology.

光合作用期间植物使用水的效率是一个关键的生理特征，它决定了植物可以在哪里生存以及它们的生长和繁殖程度。这项研究整合了遗传和生态学方法，以了解ipomopsis gentregata中用水和相关生理特征的演变，iPomopsis聚集是美国本地的野花。该项目将研究1）控制用水和相关生理特征的基因数量； 2）自然选择模式在水上可用性的环境中； 3）环境如何影响影响用水的性状的种群之间的差异。来自大型现场实验的基因型和生理特征数据将用于特征的遗传图和选择的测量。为了评估种群遗传变异，将从跨二聚体范围内的自然种群中收集基因型和气候数据。该项目将阐明植物中重要生理特征的遗传基础，并显示这些特征的差异如何发展。这项工作还将提供有关植物在不同气候和环境中经历的压力的数据。因此，结果将有助于预测气候变化对植物的影响。此外，该项目将为包括少数民族在内的大学生提供研究机会，并刺激不同生物学领域的机构和研究人员之间的合作。