Mechanisms and Consequences of Fitness in a Natural Plant Population

自然植物种群适应性的机制和后果

• 批准号: 8818066
• 负责人: Diane Campbell
• 金额: $ 4.8万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-15 至 1989-09-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8818066&HistoricalAwards=false
• 关键词: Mechanisms; Consequences; Fitness; Natural; Plant

This study addresses some of the most fundamental questions about processes that determine the evolution of flowering plants. Individual plants can vary in the amount of pollen transported to, and fertilizing, other plants (male reproduction) as well as pollen received and seeds set (female reproduction) Using dyes to follow pollen transport by animal pollinators and genetic markers to determine paternity of seeds, Dr. Campbell will determine male as well as female reproductive success in a natural plant population. The results will yield some of the first measurements of natural selection acting on flower traits through both male and female reproduction, and will allow tests of general theory on the evolution of breeding systems and energy allocation to reproductive structures. Behavioral studies of the pollinators will seek to characterize the mechanisms of this selection. In addition, methods of quantitative genetics will be used to link field measurements of heritabilities and selection to current theory. These studies will contribute to understanding of the roles of genetic constraints and conflicts between opposing selective pressures in determining the course of evolution. The results will have significance for both natural population and crop plants, particularly those in agricultural breeding programs dealing with seed and fruit production.

这项研究解决了有关决定开花植物进化的过程的一些最基本的问题。 个别植物在输送到其他植物和受精的花粉量（雄性繁殖）以及接收花粉和结籽（雌性繁殖）方面可能有所不同 使用染料跟踪动物传粉者的花粉运输和遗传标记以确定种子的亲子关系坎贝尔博士将确定自然植物种群中雄性和雌性繁殖的成功率。 这些结果将产生一些自然选择通过雄性和雌性繁殖对花卉性状产生影响的初步测量结果，并将允许对育种系统进化和繁殖结构能量分配的一般理论进行测试。 传粉者的行为研究将寻求描述这种选择机制的特征。 此外，定量遗传学方法将用于将遗传力和选择的现场测量与当前理论联系起来。 这些研究将有助于理解遗传限制的作用以及对立选择压力之间的冲突在决定进化过程中的作用。 研究结果对于自然种群和农作物都具有重要意义，特别是那些涉及种子和水果生产的农业育种计划。