Dissertation Research: Progeny Fitness and Pollen Tube Growth Rate in Raphanus sativus

本研究的目的是确定花粉供体和受体之间不同水平的遗传亲缘关系是否会影响萝卜（Raphanus sativus）个体生殖过程中的受精前后阶段。本研究分为三个目标：(1)从花粉供体和受体遗传亲缘关系的5个不同水平分析近交系对果实和种子发育以及近交系后代生长和繁殖的影响。(2)花粉/花柱交互作用也将作为五个近交水平的函数进行研究。(3)对近交效应进行统计分析，分析几个自然种群的遗传结构模式。本研究将首次详细探讨自交不亲和植物群体中近交的影响，从而为分析已实现的交配模式和自交不亲和植物微进化的一般研究提供有价值的数据。

The aim of this proposal is to determine whether different levels of genetic relatedness between pollen donor and recipient affect pre- and postfertilization stages during reproduction in individuals from a population of radish, Raphanus sativus. The project is organized into three objectives: (1) The effect of inbreeding on fruit and seed development and the growth and reproduction of inbred progeny will be analyzed for five different levels of genetic relatedness shared between pollen donor and recipient. (2) Pollen/style interaction will also be examined as a function of five levels of inbreeding. (3) Inbreeding effects will be examined statistically to analyze patterns of genetic structure within several natural populations. This research will be the first to investigate in detail the effects of inbreeding in a self-incompatible plant population and thus will provide valuable data relative to the analysis of realized mating patterns and the general study of microevolution in self-incompatible plants.