Collaborative Research: Spatially and Temporally Explicit Breeding Structure Analyses for a Tropical Dry-Forest Tree Species, Enterolobium cyclocarpum

合作研究：热带干燥森林树种环果肠球菌的时空显式育种结构分析

• 批准号: 0211526
• 负责人: James Hamrick
• 金额: $ 35万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0211526&HistoricalAwards=false
• 关键词: Collaborative; Research; Spatially; Temporally; Explicit

0211526Hamrick Changes to natural landscapes can have profound effects on population densities and spatial distributions of organisms, greatly modifying natural breeding patterns. Two novel genetic analyses will examine spatial and temporal variation in the breeding patterns of natural and human-modified populations of the tropical dry-forest tree, Enterolobium cyclocarpum, located in Guanacaste Province, Costa Rica. The availability of seed collections dating from 1995 provides a unique temporal dimension to these analyses. Studies of the pollination ecology of this species will supplement the genetic analyses allowing more informed interpretations of the genetic data.This research has several broader impacts. First, it will determine if human-induced habitat modifications significantly modify breeding patterns of tropical trees to such an extent that natural levels of genetic diversity can't be maintained. Second, temporal analyses will demonstrate whether studies of a few reproductive events adequately describe breeding patterns of a long-lived tree. These comprehensive studies should also assist the development of effective landscape management plans that consider the spatial extent of natural breeding populations. Finally, comparisons of the two genetic analyses should determine whether the less resource-demanding approach dependably estimates breeding parameters. If so, this could provide a major breakthrough for landscape-level studies of pollen movement patterns in a wide variety of plant species.

0211526 Hamrick自然景观的变化可以对生物的种群密度和空间分布产生深远的影响，极大地改变了自然繁殖模式。 两个新的遗传分析将研究自然和人类改造的热带干林树，Enterolobium cyclocarpum，位于瓜纳卡斯特省，哥斯达黎加人口的繁殖模式的空间和时间变化。 可追溯到1995年的种子收集的可用性提供了一个独特的时间维度，这些分析。 对该物种授粉生态学的研究将补充遗传分析，从而对遗传数据做出更明智的解释。 首先，它将确定人类引起的栖息地改变是否会显著改变热带树木的繁殖模式，以至于无法维持自然水平的遗传多样性。 其次，时间分析将证明是否研究的一些生殖事件充分描述了一个长寿的树的繁殖模式。这些综合研究还应有助于制定考虑到自然繁殖种群空间范围的有效景观管理计划。 最后，两种遗传分析的比较应确定是否较少的资源需求的方法依赖估计育种参数。 如果是这样的话，这可能为各种植物物种花粉运动模式的生物学水平研究提供重大突破。