DISSERTATION RESEARCH: Adaptive radiation and hybridization: testing the hybrid swarm origin hypothesis for adaptive radiations in a phylogenetic framework
论文研究:自适应辐射和杂交:在系统发育框架中测试自适应辐射的混合群起源假说
基本信息
- 批准号:1502049
- 负责人:
- 金额:$ 1.87万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2015
- 资助国家:美国
- 起止时间:2015-05-01 至 2018-04-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Adaptive radiation and ecological opportunity are known to play major roles in the formation of new biodiversity. In this model, a few ancestral species diversify rapidly to fill ecological space with a variety of new morphological and ecological strategies. Recently, hybridization among closely related species has been hypothesized to play an important role during the early stages of an adaptive radiation, but studies investigating this process in plants are currently lacking. This project will evaluate the role of hybridization in facilitating an adaptive radiation using the Andean plant genus Lachemilla (Rosaceae) as a model. Lachemilla comprises approximately 50 described species and is restricted to high elevation habitats throughout the Andes. Phylogenetic analyses of chloroplast and single-copy nuclear DNA gene sequences from multiple Lachemilla species will first be used to reconstruct evolutionary relationships. Using this evolutionary framework, researchers will then use a variety of statistical approaches to investigate the role played by hybridization in driving diversification within the lineage. This research will provide extensive training in systematics and evolutionary biology to a graduate student, and enhance international scientific collaboration with researchers in Ecuador. This project will provide training for one undergraduate student in laboratory techniques and data analysis, and also provide valuable mentoring experience for the co-PI. This project will use phylogenetic methods to investigate and test the hybrid swarm origin and syngameon hypotheses for the generation of functional diversity during an adaptive radiation using the plant genus Lachemilla (Rosaceae). A robust and comprehensive phylogeny from hundreds of Lachemilla accessions using high-throughput sequencing approaches of whole chloroplast and multiple single-copy nuclear regions will be generated using Bayesian approaches. This phylogenetic framework will then be used to first test for evidence of hybridization, and then investigate whether morphological, functional, and phylogenetic diversification in the clade coincides with hybridization events. By integrating modern comparative phylogenetic measures of trait evolution with sophisticated analyses of lineage diversification rates, this research will investigate the explicit role of hybridization in the early stages of an adaptive radiation.
适应性辐射和生态机会在新生物多样性的形成中起着重要作用。在该模型中,少数祖先物种迅速多样化,以各种新的形态和生态策略填充生态空间。最近,近缘物种间的杂交被假设在适应性辐射的早期阶段发挥重要作用,但目前缺乏对植物这一过程的研究。本项目将以安第斯山脉的蔷薇属植物(蔷薇科)为模型,评估杂交在促进适应性辐射中的作用。Lachemilla包括大约50种已描述的物种,仅限于整个安第斯山脉的高海拔栖息地。系统发育分析的叶绿体和单拷贝核DNA基因序列将首先用于重建进化关系。利用这一进化框架,研究人员将使用各种统计方法来研究杂交在推动谱系多样化中所起的作用。这项研究将为研究生提供系统学和进化生物学方面的广泛培训,并加强与厄瓜多尔研究人员的国际科学合作。该项目将为一名本科生提供实验室技术和数据分析方面的培训,并为联合项目负责人提供宝贵的指导经验。本项目将采用系统发育的方法,研究和验证在适应性辐射中产生功能多样性的杂交群体起源和合子假说。利用贝叶斯方法,利用全叶绿体和多个单拷贝核区域的高通量测序方法,对数百种Lachemilla材料进行了强大而全面的系统发育分析。这个系统发育框架将首先用于测试杂交的证据,然后研究进化枝的形态、功能和系统发育多样化是否与杂交事件相吻合。本研究将结合性状进化的现代比较系统发育测量和谱系多样化率的复杂分析,探讨杂交在适应性辐射早期阶段的明确作用。
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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David Tank其他文献
David Tank的其他文献
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{{ truncateString('David Tank', 18)}}的其他基金
Critical improvement of the Rocky Mountain Herbarium: securing and enabling access to the world's largest collection of plants in the Rocky Mountain region
落基山植物标本馆的重大改进:确保并能够访问落基山地区世界上最大的植物收藏
- 批准号:
2234631 - 财政年份:2023
- 资助金额:
$ 1.87万 - 项目类别:
Continuing Grant
DISSERTATION RESEARCH: Investigating the main contributors to plant speciation in a rapidly diverging lineage in western North America
论文研究:调查北美西部快速分化的谱系中植物物种形成的主要贡献者
- 批准号:
1502061 - 财政年份:2015
- 资助金额:
$ 1.87万 - 项目类别:
Standard Grant
CAREER: Correlates of diversification and the investigation of the accumulation of evidence for speciation: phylogeny and systematics of a rapid and recent radiation
职业:多样化的相关性和物种形成证据积累的调查:快速和近期辐射的系统发育和系统学
- 批准号:
1253463 - 财政年份:2013
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$ 1.87万 - 项目类别:
Continuing Grant
DISSERTATION RESEARCH: Investigating the accumulation of evidence for speciation: species delimitation in a rapid and recent radiation
论文研究:调查物种形成证据的积累:快速和近期辐射中的物种界定
- 批准号:
1210895 - 财政年份:2012
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$ 1.87万 - 项目类别:
Standard Grant
Collaborative Research: The Online Consortium of Pacific Northwest Herbaria Expanded to Include Taxonomically Diverse Specimens from Large and Small Regional Collections
合作研究:太平洋西北植物标本馆在线联盟扩大规模,纳入来自大小区域收藏的分类学多样化标本
- 批准号:
0955475 - 财政年份:2010
- 资助金额:
$ 1.87万 - 项目类别:
Continuing Grant
Plasticity of Neural Integrator Dynamics
神经积分动力学的可塑性
- 批准号:
0242945 - 财政年份:2002
- 资助金额:
$ 1.87万 - 项目类别:
Continuing Grant
Plasticity of Neural Integrator Dynamics
神经积分动力学的可塑性
- 批准号:
9986022 - 财政年份:2000
- 资助金额:
$ 1.87万 - 项目类别:
Continuing Grant
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