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演变的过程的一些最根本的问题。 单个植物的花粉数量可能会有所不同，并施肥了其他植物（男性生殖）以及收到的花粉和种子（女性繁殖），使用染料来跟随动物传粉媒介和遗传标志物的花粉运输，以确定种子的亲子性，坎贝尔博士将确定男性以及女性在天然植物中的生殖成功。 结果将产生作用于雄性和女性繁殖在花卉性状上的自然选择的一些测量，并允许对繁殖系统的演变和能量分配的一般理论进行测试。 传粉媒介的行为研究将寻求表征这种选择的机制。 此外，定量遗传学方法将用于将遗产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约束的作用和反对选择性压力在确定进化过程中的冲突。 该结果对自然种群和农作物植物都具有重要意义，尤其是在农业繁殖计划中涉及种子和水果生产的植物。