REU: Genetic Structure within Oak Populations
REU:橡树种群内的遗传结构
基本信息
- 批准号:8814620
- 负责人:
- 金额:$ 21.37万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1989
- 资助国家:美国
- 起止时间:1989-01-01 至 1992-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The genetic structure of populations can range from one large interbreeding population with genetic variation distributed throughout to a series of small interbreeding subpopulations which are genetically differentiated from each other. The genetic structure of populations results from the interactions of gene flow, natural selection, and genetic drift and also influences how these evolutionary forces will affect that population. The proposed research will determine whether natural selection can cause genetic differentiation within forest tree populations by measuring mating system (i.e. the degree of outcrossing), local selection due to microhabitat, and population genetic structure of two oak species, white oak (Quercus alba) and red oak (Q. rubra). This study will be conducted over a three year period in an oak-hickory forest in central eastern Missouri. Most of the research will be conducted within a 4 ha study plot which contains four types of microhabitat: north- facing slope, southwest-facing slope, west-facing slope, and bottom land. Genetic structure will be described with F- statistics and other appropriate measures using enzyme genetic markers identified through starch gel electrophoresis. The mating system for each species will be measured each year also using enzyme genetic markers. Local selection due to microhabitat will be studied using a reciprocal transplant experiment. The project addresses significant questions for evolutionary biologists about the potential of local selection to influence population structure in angiosperm tree species which may have high outcrossing rates. This study will also provide useful genetic information on an ecologically and economically significant genus in North American forests. Oaks are a valuable commodity for lumber and they provide crucial resources for wildlife. Understanding the distribution of genetic variation within a forest species will help in determining sampling schemes for forest management. In addition, such information will help us understand the ability of increasingly fragmented forest tree populations to respond to natural and human-induced stress.
种群的遗传结构范围可以从一个分布有遗传变异的大型杂交种群到一系列在遗传上彼此不同的小型杂交亚种群。 种群的遗传结构是基因流、自然选择和遗传漂变相互作用的结果,也会影响这些进化力量如何影响该种群。 拟议的研究将通过测量交配系统(即异型杂交的程度)、微生境引起的局部选择以及白橡树(Quercus alba)和红橡树(Q. rubra)这两种橡树的种群遗传结构来确定自然选择是否会导致林木种群内的遗传分化。 这项研究将在密苏里州中东部的橡树山核桃森林中进行三年。 大部分研究将在一个 4 公顷的研究地块内进行,该研究地块包含四种类型的微生境:朝北的斜坡、西南的斜坡、西向的斜坡和洼地。 将使用通过淀粉凝胶电泳鉴定的酶遗传标记,通过 F 统计和其他适当的测量来描述遗传结构。 每个物种的交配系统每年都会使用酶遗传标记进行测量。 将通过相互移植实验来研究微生境引起的局部选择。 该项目为进化生物学家解决了关于局部选择影响可能具有高异交率的被子植物树种种群结构的潜力的重大问题。 这项研究还将提供有关北美森林中具有生态和经济意义的属的有用遗传信息。 橡树是一种宝贵的木材商品,为野生动物提供了重要的资源。 了解森林物种内遗传变异的分布将有助于确定森林管理的抽样方案。 此外,这些信息将帮助我们了解日益分散的森林树木种群应对自然和人为压力的能力。
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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Victoria Sork其他文献
Victoria Sork的其他文献
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{{ truncateString('Victoria Sork', 18)}}的其他基金
LTREB: Long-term provenance study of phenotypic plasticity, local adaptation, and response to climate in Quercus (Q-PLAD)
LTREB:栎树表型可塑性、局部适应和气候响应的长期起源研究 (Q-PLAD)
- 批准号:
2232794 - 财政年份:2023
- 资助金额:
$ 21.37万 - 项目类别:
Continuing Grant
Sequencing and Annotating the Valley Oak Genome
山谷橡树基因组测序和注释
- 批准号:
1444611 - 财政年份:2015
- 资助金额:
$ 21.37万 - 项目类别:
Standard Grant
Collaborative research: Seed-flow in California Valley Oak (Quercus lobata)--Novel Approaches to an Old Problem
合作研究:加州谷橡树(Quercus lobata)的种子流——解决老问题的新方法
- 批准号:
0516529 - 财政年份:2005
- 资助金额:
$ 21.37万 - 项目类别:
Standard Grant
Collaborative Research: Landscape Patterns of Pollen Movement in Declining Populations of California Valley Oak, Quercus Lobata
合作研究:加州谷橡树、栎树种群数量下降中花粉运动的景观模式
- 批准号:
0242422 - 财政年份:2002
- 资助金额:
$ 21.37万 - 项目类别:
Continuing Grant
Collaborative Research: Landscape Patterns of Pollen Movement in Declining Populations of California Valley Oak, Quercus Lobata
合作研究:加州谷橡树、栎树种群数量下降中花粉运动的景观模式
- 批准号:
0089445 - 财政年份:2001
- 资助金额:
$ 21.37万 - 项目类别:
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Dissertation Research: Impact of Landscape Management on Mating Patterns and Pollen Movement in Short Leaf Pine
论文研究:景观管理对短叶松交配模式和花粉运动的影响
- 批准号:
0073242 - 财政年份:2000
- 资助金额:
$ 21.37万 - 项目类别:
Standard Grant
Dissertation Research: Effect of an Experimentally Created Light Gradient on Tree Seedling Performance in a Tropical Secondary Forest Community
论文研究:实验创建的光梯度对热带次生林群落树木幼苗性能的影响
- 批准号:
9411808 - 财政年份:1994
- 资助金额:
$ 21.37万 - 项目类别:
Standard Grant
Consequences of Pollen Source and Fruit Abortion on Progeny Fitness in Cassia Fasciculata (Environmental Science)
花粉源和果实败育对决明后代健康的影响(环境科学)
- 批准号:
8503512 - 财政年份:1985
- 资助金额:
$ 21.37万 - 项目类别:
Standard Grant
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