Perennial Plant Inbreeding Depression: Models and Estimation Procedures

多年生植物近交衰退：模型和估计程序

• 批准号: 9974017
• 负责人: Martin Morgan
• 金额: $ 8.31万
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-15 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9974017&HistoricalAwards=false
• 关键词: Perennial; Plant; Inbreeding; Depression; Models

9974017MorganVirtually all plants experience inbreeding depression, with offspring of related individuals having lower fitness than offspring of unrelated individuals. This research investigates inbreeding depression in species, such as trees or grasses, that live for many years. Goals are to: 1) develop genetically-based models of inbreeding depression in long lived perennials; and 2) develop methods for measuring inbreeding depression over short time spans, rather than over the entire perennial life history. Methods include computer and analytic modeling of specific, well documented, genetically-based inbreeding depression in perennials. Statistical methods will use patterns of genetic variation and information about individual age to infer the amount of inbreeding depression.The research offers genetically explicit insight into inbreeding depression in perennials. It is anticipated that the research will provide guidance for breeding of long-lived plants important in, for instance, reforestry and fruit tree breeding. Greater understanding of inbreeding depression in perennials is an important consideration in developing conservation and natural resource management plans for the many ecosystems in which perennials predominate. Finally, the research provides basic insight into the interaction between life history and inbreeding depression. Such interactions are of particular importance in understanding the evolution and diversity of plant breeding systems.

9974017摩根几乎所有的植物都会经历近亲繁殖衰退，相关个体的后代比无关个体的后代具有更低的适应性。这项研究调查了物种的近亲繁殖衰退，如树木或草，生活多年。目标是：1）开发长寿多年生植物中基于遗传的近亲繁殖衰退模型; 2）开发在短时间内测量近亲繁殖衰退的方法，而不是在整个多年生植物生活史中。方法包括计算机和分析模型的具体，有据可查，遗传为基础的近亲繁殖抑郁症多年生植物。统计方法将使用遗传变异的模式和有关个体年龄的信息来推断近交衰退的程度。这项研究为多年生植物的近交衰退提供了遗传上的明确见解。预计这项研究将为培育长寿植物提供指导，例如，再造林和果树育种。在多年生植物占主导地位的许多生态系统中，更好地了解多年生植物的近亲繁殖衰退是制定保护和自然资源管理计划的重要考虑因素。最后，这项研究提供了基本的洞察生活史和近亲繁殖抑郁症之间的相互作用。这种相互作用在理解植物育种系统的进化和多样性方面特别重要。