Perennial Plant Inbreeding Depression: Models and Estimation Procedures

9974017摩根几乎所有的植物都经历了近亲繁殖的衰退，亲缘个体的后代比非亲缘个体的后代适应性更低。这项研究调查了一些物种的近亲繁殖衰退，比如树木或草，这些物种可以存活很多年。目标是：1)在长寿多年生植物中建立基于基因的近亲繁殖抑郁症模型；2)发展短期内测量近亲繁殖衰退的方法，而不是整个生命周期的方法。方法包括计算机和分析模型的具体，充分记录，遗传基础近交抑郁症多年生植物。统计方法将使用遗传变异模式和个体年龄信息来推断近亲繁殖抑制的数量。这项研究为多年生植物的近亲繁殖抑郁症提供了遗传学上的明确见解。预计该研究将为再生林业和果树育种等长寿植物的选育提供指导。在多年生植物为主的生态系统中，对多年生植物近亲繁殖抑制的深入了解是制定保护和自然资源管理计划的重要考虑因素。最后，该研究提供了生活史与近亲交配抑郁之间相互作用的基本见解。这种相互作用对了解植物育种系统的进化和多样性具有特别重要的意义。

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.