Physiological Basis of a Genetically-determined Life- history Trade-off

基因决定的生命史权衡的生理学基础

• 批准号: 9107429
• 负责人: Anthony Zera
• 金额: $ 16.91万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-10-15 至 1996-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9107429&HistoricalAwards=false
• 关键词: Physiological; Basis; Genetically; determined; Life

The goal of this proposal is to address a central but poorly understood topic in the evolution of life-history patterns in organisms: whether trade-offs of one ability relative to another result from trade-offs of nutritional resources at the physiological level. Specifically, the trade-off between flight capability and reproductive output of the crickets Gryllus rubens, will be considered. Individuals of this species occur as one of two genetically determined forms. One form exhibits elevated egg production but cannot fly while the other is less fecund but is capable of flight. The nutritional intake of the two forms and the internal partitioning of nutrients among flight, reproductive and other non-flight and non-reproductive tissues in these crickets will be measured. This study will break new ground in its effort to investigate whether there is a trade-off of resources between the anatomical structures and physiological processes underlying a genetically determined trade-off seen at the level of whole organism life-history. In addition, by obtaining data on the physiological bases of dispersal and reproduction, this study will provide important background information for applied studies that attempt to control insect populations.

该提案的目标是解决生物体生命史模式进化中的一个核心但人们知之甚少的主题：一种能力相对于另一种能力的权衡是否是由于生理水平上营养资源的权衡造成的。 具体来说，将考虑蟋蟀Gryllus rubens的飞行能力和繁殖输出之间的权衡。 该物种的个体以两种基因决定的形式之一出现。 一种形式的产蛋量较高，但不能飞行，而另一种形式的产蛋量较低，但能够飞行。 将测量这两种形式的营养摄入量以及营养物质在这些蟋蟀的飞行、生殖和其他非飞行和非生殖组织之间的内部分配。 这项研究将在研究解剖结构和生理过程之间是否存在资源权衡方面开辟新的领域，而这种资源权衡是在整个生物体生命史水平上由遗传决定的权衡的基础。 此外，通过获得传播和繁殖的生理基础数据，这项研究将为试图控制昆虫种群的应用研究提供重要的背景信息。