Collaborative Research: Population differentiation in an herbaceous plant: genetic divergence and outbreeding depression

合作研究：草本植物的群体分化：遗传分化和远交抑制

• 批准号: 0922214
• 负责人: Laura Galloway
• 金额: $ 9.18万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0922214&HistoricalAwards=false
• 关键词: Collaborative; Research; Population; differentiation; herbaceous

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).ABSTRACTIn plants, the distinction between species is often not complete, allowing for the production of hybrids that frequently perform poorly. Conversely, within a single species, genetic differentiation may develop between isolated populations resulting in poor performance of crosses, termed outbreeding depression. The long-term goal of this research is to evaluate patterns of outbreeding depression and genetic divergence for an herbaceous plant where preliminary data reveal up to a 90% reduction in performance of between-population crosses relative to their parents. Addressing this goal requires molecular genetic markers suitable for assessing population differentiation. The proposed research will develop molecular markers and use those markers to evaluate divergence among four isolated populations. Studies of genetic divergence and outbreeding depression are important as they provide a glimpse into the earliest stages of speciation. In addition, conservation and restoration programs often involve combining individuals from different populations. A greater understanding of the source of outbreeding depression is necessary to make management decisions about mixing gene pools from different populations.

该奖项是根据2009年的《美国回收与再投资法》（公法111-5）的。Abstractin植物资助的，物种之间的区别通常不完整，允许生产经常表现不佳的杂种。相反，在一个物种中，孤立的种群之间可能会发展遗传分化，导致十字的性能不佳，称为抑郁症。这项研究的长期目标是评估草本植物的抑郁症和遗传差异的模式，在该植物中，初步数据显示，相对于父母，人口间杂交的性能降低了90％。解决此目标需要适合评估人群分化的分子遗传标记。拟议的研究将开发分子标记，并使用这些标记来评估四个孤立人群之间的差异。对遗传差异和异生抑郁症的研究非常重要，因为它们可以瞥见最早的物种阶段。此外，保护和恢复计划通常涉及将来自不同人群的个人结合在一起。对育种抑郁症的来源有更深入的了解，对于对来自不同人群的基因库混合的管理决定是必要的。