Collaborative Research: The Role of Frequency Dependent Selection in the Evolution of Color Pattern Polymorphism in Guppies

合作研究：频率依赖选择在孔雀鱼颜色图案多态性进化中的作用

• 批准号: 0128820
• 负责人: Kimberly Hughes
• 金额: --
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-05-01 至 2008-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0128820&HistoricalAwards=false
• 关键词: Collaborative; Research; Role; Frequency; Dependent

Naturally occurring populations of guppies (Poecilia reticulata) exhibit striking genetically based variability in the color patterns of males. Each male has a unique color pattern or one that is shared with one or very few other fish in the population. How this polymorphism is maintained remains a mystery despite decades of study on this model organism. Laboratory studies have suggested that the mating success of males may depend on how rare or common their color pattern is, and theory suggests that such frequency dependent selection could maintain genetic variation. This study will examine the role of frequency dependent selection in maintaining color pattern variation in naturally occurring guppy populations. It will use new techniques for molecular paternity analysis and permanent marking of fish to examine patterns of survival and mating success of individual fish in streams. Understanding how genetic variation can persist in natural populations has long been a goal of research in evolutionary biology and more empirical study is needed. Dwindling populations of organisms often suffer from loss of genetic variation. Thus, this is an increasingly important topic for investigation and application to conservation strategies. This research involves an international collaboration between research and undergraduate institutions, and research participation by undergraduates and a high school teacher.

自然发生的种群孔雀鱼（孔雀鱼）表现出显着的遗传基础上的变化，在颜色模式的男性。每一个男性有一个独特的颜色模式或一个是共享的一个或很少其他鱼类的人口。尽管对这种模式生物进行了数十年的研究，但这种多态性是如何保持的仍然是一个谜。实验室研究表明，雄性的交配成功可能取决于它们的颜色模式的罕见程度或常见程度，理论表明，这种频率依赖性选择可以维持遗传变异。本研究将探讨频率依赖性选择的作用，在维持自然发生的孔雀鱼种群的颜色模式的变化。它将使用分子亲子鉴定分析和鱼类永久标记的新技术，以检查溪流中个体鱼类的生存模式和交配成功率。了解遗传变异如何在自然种群中持续存在一直是进化生物学研究的目标，需要更多的实证研究。不断减少的生物种群往往遭受遗传变异的损失。因此，这是一个越来越重要的主题，研究和应用的保护战略。这项研究涉及研究和本科院校之间的国际合作，以及本科生和高中教师的研究参与。