DISSERTATION RESEARCH: Maintenance of a Flower Color Polymorphism in Mimulus Aurantiacus

论文研究： 酸橙花颜色多态性的维持

• 批准号: 0309153
• 负责人: Joshua Kohn
• 金额: $ 1.2万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-01 至 2005-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0309153&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Maintenance; Flower; Color

This study investigates the factors maintaining a spatially discrete flower color polymorphism between coastal and inland populations of southern California Mimulus aurantiacus. Coastal populations contain exclusively red flowers, while approximately 30 km from the coast there is an abrupt transition to yellow flowers. This pattern makes M. aurantiacus an extremely interesting system for investigating whether this polymorphism has been influenced by historical barriers to gene flow or whether (and how) natural selection has shaped it. We will use a combination of molecular genetics, field observations, and experimental studies to examine the degree of morphological, geographical, and genetic differentiation between these morphs while attempting to describe the relative roles of pollinator versus non-pollinator selection on the maintenance of this polymorphism. This research program will be important for increasing our understanding of the forces maintaining trait variation in nature. Preliminary results implicate a strong role for natural selection in preserving this polymorphism, but the selective forces remain unclear. Proposed field and laboratory work will include the assistance of many undergraduate researchers. Their involvement in these studies is crucial to its success and provides for enhanced educational experiences.

这项研究调查了在南加州Mimulus aurantiacus之间维持空间离散的花色多态性的因素。沿海人口仅包含红色的花朵，而距沿海约30公里的人则突然过渡到黄色的花朵。 这种模式使Aurantiacus M.成为研究这种多态性是否受到基因流动的历史障碍的影响，或者（以及如何（以及如何）自然选择塑造了这种多态性的系统。我们将使用分子遗传学，现场观察和实验研究的结合来检查这些形态之间的形态，地理和遗传分化程度，同时试图描述授粉媒介与非细胞选择在维持这种多态性方面的相对作用。 该研究计划对于增加我们对维持自然特征变化的力量的理解将非常重要。初步结果暗示了自然选择在保留这种多态性方面的重要作用，但是选择性力仍然不清楚。 拟议的现场和实验室工作将包括许多本科研究人员的协助。他们参与这些研究对于成功至关重要，并提供了增强的教育经验。