| 项目编号: | 1556858
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| 项目名称: | SG: Collaborative Research: A genomic analysis of the impact of genetic divergence, and chromosomal rearrangement on introgression in replicate Fundulus hybrid zones |
| 作者: | Jacob Schaefer
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| 承担单位: | University of Southern Mississippi
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| 批准年: | 2016
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| 开始日期: | 2016-06-01
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| 结束日期: | 2019-05-31
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| 资助金额: | 53434
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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: | hybridization
; hybrid zone
; genetic map
; population
; divergence
; high school curricula
; mississippi river basin
; chromosomal rearrangement
; speciation process
; mate choice dynamics
; research experience
; hybrid offspring
; spatial pattern
; such mechanism
; fundulus notatus species complex
; mexico drainage
; artificial breeding experiment
; evolutionary concept
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| 英文摘要: | Hybridization occurs when members of different species attempt to reproduce. While hybridization has traditionally been viewed as normally inconsequential to species integrity and the speciation process (hybrids were assumed to be inviable for some reason), there is growing evidence it may actually be beneficial and accelerate speciation under some circumstances. Understanding the origins of biodiversity requires more thorough knowledge of mechanisms that may alter the outcome of hybridization. One such mechanism is the rearrangement of chromosomes that may change the genomic structure of species in a way that limits the potential for hybridization. This project will study a model fish species, topminnows, in order to understand how divergence and chromosomal rearrangements may interact to determine the dynamics of naturally occurring hybrid zones. The research will also be used in development of high school curricula to teach evolutionary concepts and to provide research experiences for undergraduates.
Topminnows in the Fundulus notatus species complex have broadly overlapping ranges throughout much of the Mississippi River basin and northern Gulf of Mexico drainages. Earlier work with these species identified a number of replicate hybrid zones where the hybridizing species and populations differ in levels of divergence and, in some cases, chromosome number. The researchers will use modern genomic tools to quantify the amount of hybridization and patterns of introgression in eight replicate hybrid zones. Artificial breeding experiments in the laboratory will produce progeny that will facilitate the production of genetic maps of hybridizing populations. Genetic maps will elucidate spatial patterns of gene flow in replicate hybrid zones. Experimental hybrid zone trials will also examine mate choice dynamics and the viability of hybrid offspring. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92308
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Jacob Schaefer. SG: Collaborative Research: A genomic analysis of the impact of genetic divergence, and chromosomal rearrangement on introgression in replicate Fundulus hybrid zones. 2016-01-01.
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