Inbreeding Depression and the Evolution of Dioecy in Higher Plants

高等植物的近交衰退和雌雄异体的进化

• 批准号: 9981803
• 负责人: Leonel Sternberg
• 金额: $ 16.4万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-02-01 至 2005-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9981803&HistoricalAwards=false
• 关键词: Inbreeding; Depression; Evolution; Dioecy; Higher

9981803SchultzThis project is a theoretical study of the role of inbreeding depression in the evolution of gender in higher plants, and has two major goals: (1) the development of a general, empirically testable theory of inbreeding depression in plant populations, and (2) the application of this theory to the problem of the role of inbreeding in the evolutionary pathway from hermaphroditism to separate sexes. Methods used include numerical combinatorial analysis, parallel programming, and stochastic individual-based modeling.These investigations will illuminate our understanding of genetic mechanisms involved in four major areas of active research in evolutionary mechanisms in higher plants: evolution of separate sexes from hermaphroditism, evolution of inbreeding depression in mixed-mating species, evolutionary genetics and viability of small populations, and evolution of the outcrossing rate generally. The results are also pertinent to the theory and methods of purging genetic load from agricultural species through controlled breeding, the production of genetically viable male-sterile lines, and the genetic management of endangered plant populations.

9981803Schultz该项目是一个理论研究的作用，近亲繁殖的衰退在进化中的性别在高等植物，并有两个主要目标：（1）发展的一般，经验检验理论的近亲繁殖衰退在植物种群，（2）应用这一理论的问题，近亲繁殖的作用，进化途径从雌雄同体到分开的性别。 所使用的方法包括数值组合分析，并行编程，和随机个体为基础的modeling.These调查将照亮我们的理解的遗传机制，涉及在高等植物进化机制的积极研究的四个主要领域：从两性畸形中分离性别的进化，混合交配物种中近亲繁殖衰退的进化，进化遗传学和小种群的生存能力，和异交率的进化。这些结果也与通过控制育种从农业物种中清除遗传负荷的理论和方法有关，遗传上可行的雄性不育系的生产，以及濒危植物种群的遗传管理。