| 项目编号: | 1502049
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| 项目名称: | DISSERTATION RESEARCH: Adaptive radiation and hybridization: testing the hybrid swarm origin hypothesis for adaptive radiations in a phylogenetic framework |
| 作者: | David Tank
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| 承担单位: | University of Idaho
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| 批准年: | 2014
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| 开始日期: | 2015-05-01
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| 结束日期: | 2018-04-30
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| 资助金额: | USD18743
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Biological Sciences - Environmental Biology
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| 英文关键词: | adaptive radiation
; hybridization
; researcher
; research
; syngameon hypothesis
; hybridization event
; evolutionary framework
; project
; hybrid swarm origin
; phylogenetic framework
|
| 英文摘要: | 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. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94746
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
David Tank. DISSERTATION RESEARCH: Adaptive radiation and hybridization: testing the hybrid swarm origin hypothesis for adaptive radiations in a phylogenetic framework. 2014-01-01.
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