Dissertation Research: Postpollination Effects in the Columbine, Aquilegia caerulea

论文研究：耧斗菜、蓝耧斗菜的授粉后效应

• 批准号: 8700870
• 负责人: Nickolas Waser
• 金额: $ 0.76万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-05-15 至 1989-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8700870&HistoricalAwards=false
• 关键词: Dissertation; Research; Postpollination; Effects; Columbine

Although much is known about the variation among individual plants in ability to produce seeds, little is known about how different individuals within natural plant populations differ in their ability to produce pollen. The differential success of individuals in siring seeds could be a powerful force influencing the ecology and evolution of plants. This project addresses the possibility that individuals can differ in their success in siring seeds during the postpollination phase in the blue columbine, Aquilegia caerulea. It will also determine if differential success of males, should it exist, occurs prior to fertilization or after fertilization during seed development. The study employs a number of modern techniques that allow determination of , for example, paternal contributions to seeds when pollen from more than one individual has been applied to a single stigma. Controlled breeding experiments will reveal the effects of environment, maternal, and paternal parents on seed produciton and seed and seedling characteristics. By doing such studies in both natural and cultivated populations of plants, the project can determine tha potential for selection on male reproduction in nature. Further studies can determine whether variation in success of individuals is caused by features which are inherited by offspring. Understanding the potential for selection on male success after pollination is relevant to studies in evolutionary biology and to development of artificial selection techniques in crop breeding.

尽管人们对个体植物产生种子的能力的差异了解很多，但对自然植物种群中不同个体产生花粉的能力有何不同却知之甚少。 个体在繁殖种子方面的不同成功可能是影响植物生态和进化的强大力量。 该项目解决了在蓝耧斗菜（Aquilegia caerulea）授粉后阶段，个体在授粉成功方面可能存在差异的可能性。 它还将确定雄性的差异成功率（如果存在）是否发生在种子发育过程中的受精之前或受精之后。 该研究采用了许多现代技术，例如，当来自多个个体的花粉被施加到单个柱头上时，可以确定父系对种子的贡献。 对照育种实验将揭示环境、母本和父本对种子生产以及种子和幼苗特性的影响。 通过对自然和栽培植物种群进行此类研究，该项目可以确定自然界中雄性繁殖选择的潜力。 进一步的研究可以确定个体成功的差异是否是由后代遗传的特征引起的。 了解授粉后雄性成功选择的潜力与进化生物学研究和作物育种中人工选择技术的发展相关。