Experimental and Theoretical Studies of the Coevolution of Inbreeding Depression and Mating System
近交抑制与交配系统协同进化的实验与理论研究
基本信息
- 批准号:9707684
- 负责人:
- 金额:$ 23.5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1997
- 资助国家:美国
- 起止时间:1997-08-01 至 2001-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9707684 Uyenoyama Mating between closely related individuals often results in inbreeding depression, or the production of offspring of lower quality. This project addresses the evolution of mating systems in response to inbreeding depression and its evolution in turn in response to the mating system. Theoretical analyses suggest that the penalty of inbreeding depression evolves to different magnitudes among familial lineages that practice different levels of inbreeding. Among the possible consequences of such interactions is the evolution of mixed mating systems, which entail both inbreeding and outbreeding. Natural populations of Datura stramonium, which practices a mixed mating system, provide a model system for the direct exploration of these issues. Previous work has demonstrated that a morphological character (stigma-anther distance) is both heritable and a determinant of the level of inbreeding in individuals. The magnitude of inbreeding depression will be estimated in individual families. This system permits a test of whether inbreeding depression at the family level is associated with mating system. In addition, numerical simulation studies will be conducted to explore various aspects of associations between inbreeding depression and familial lineage, including their genetic bases and consequences for the evolution of mating systems. All living organisms are subject to the deleterious effects of mutations. Processes that influence the generation, purging, and maintenance of mutational load directly affect the length and quality of life. Theoretical and empirical studies have established mating system as a major determinant as well as a consequence of inbreeding depression in natural populations.
小行星9707684 近亲交配通常会导致近亲繁殖的衰退,或者产生质量较低的后代。 该项目解决了交配系统的进化,以应对近亲繁殖的抑郁症,并反过来回应交配系统的演变。 理论分析表明,近亲繁殖衰退的惩罚在实行不同程度近亲繁殖的家族谱系中演变到不同的程度。 这种相互作用的可能后果之一是混合交配系统的进化,这需要近亲繁殖和远系繁殖。 曼陀罗的自然种群,实行混合交配系统,提供了一个模型系统,直接探讨这些问题。 以前的研究表明,一个形态特征(柱头花药距离)是遗传的,并在个人的近亲繁殖水平的决定因素。 的大小 将在单个家庭中估计近交衰退。 这个系统允许测试是否在家庭水平的近亲繁殖衰退与交配系统。 此外,还将进行数值模拟研究,以探索近亲繁殖衰退和家族血统之间的关联的各个方面,包括其遗传基础和交配系统进化的后果。 所有的生物体都会受到突变的有害影响。 影响突变负荷的产生、清除和维持的过程直接影响突变负荷的长度。 和生活质量。 理论和实证研究表明,交配系统是自然种群近交衰退的主要决定因素,也是近交衰退的结果。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Marcy Uyenoyama其他文献
Marcy Uyenoyama的其他文献
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{{ truncateString('Marcy Uyenoyama', 18)}}的其他基金
US/Germany/Japan Trinational Workshop on Molecular Evolution
美国/德国/日本分子进化三国研讨会
- 批准号:
9722424 - 财政年份:1997
- 资助金额:
$ 23.5万 - 项目类别:
Standard Grant
1978 National Needs Postdoctoral Fellowship Program
1978年 国家急需博士后资助计划
- 批准号:
7815563 - 财政年份:1978
- 资助金额:
$ 23.5万 - 项目类别:
Fellowship Award
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