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Dissertation Research: An Analysis of Maternal Effects in the American Coot: Consequences for Offspring Growth and Survival

论文研究：美国白顶鹤母体效应分析：对后代生长和生存的影响

基本信息

批准号：
9801503
负责人：
Carol Vleck
金额：
$ 0.65万
依托单位：
Iowa State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1998
资助国家：
美国
起止时间：
1998-06-15 至 2000-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9801503&HistoricalAwards=false
关键词：
Dissertation Research Analysis Maternal Effects

项目摘要

Vleck 9801503 Maternal effects describe the non-genetic component of the interaction between mother and offspring characteristics. Eggs are an ideal system in which to study maternal effects because investments made prior to hatching can be measured directly and correlated with subsequent offspring performance. In a population of wild birds studied in 1997, the egg size from which an individual hatched explained a significant amount of the variation in mortality among genetically related individuals during the first two weeks after hatch. The amount of yolk remaining at hatch and yolk testosterone are two maternal effects which may provide a mechanistic understanding of the differences in survival between large and small offspring. In project one the investigator will manipulate the amount of yolk remaining at hatch and explore the effects of these yolk reserves on hatchling growth, development and survival. In project two the investigator will characterize yolk testosterone in eggs and correlate this with chick performance after hatch using a fostering protocol. This fostering design allows for the distinction between pre-hatching and post-hatching maternal effects. Both projects provides for a powerful analysis of variation in maternal effects and the subsequent consequences to offspring performance.

Vleck 9801503 母体效应描述了母体和后代特征之间相互作用的非遗传成分。鸡蛋是研究母体效应的理想系统，因为孵化前的投资可以直接测量，并与随后的后代表现相关。在1997年研究的一个野生鸟类种群中，孵化个体的卵大小解释了孵化后前两周内遗传相关个体之间死亡率的显著差异。孵化时剩余的卵黄量和卵黄睾酮是两个母体效应，这可能提供了一个机制的理解之间的差异生存的大和小的后代。在项目一中，研究人员将操纵孵化时剩余的蛋黄量，并探索这些蛋黄储备对孵化的生长，发育和生存的影响。在项目二中，研究者将描述鸡蛋中的蛋黄睾酮，并将其与孵化后使用寄养协议的鸡的性能相关联。这种培育设计允许区分孵化前和孵化后的母体效应。这两个项目提供了一个强大的分析母体效应的变化和随后的后果后代的表现。