| 项目编号: | 1354272
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| 项目名称: | Contemporary co-evolution of gamete recognition proteins |
| 作者: | Don Levitan
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| 承担单位: | Florida State University
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| 批准年: | 2013
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| 开始日期: | 2014-09-01
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| 结束日期: | 2018-08-31
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| 资助金额: | USD400000
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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: | evolution
; reproductive compatibility
; species
; protein
; egg protein
; ecological process
; egg recognition protein
; incompatible type
; sea urchin
; new protein
; novel protein
; population density
; gamete competition
; conservation interest
; gamete recognition
; field ecology
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| 英文摘要: | This project examines variation over time in the interacting sperm and egg recognition proteins in a species of sea urchin that has experienced a profound shift in population density over the past 200 years. The proteins on the surface of eggs and sperm determine which males can reproduce with which females and often define whether one species is distinct from another. This study will determine what makes fertilization possible among some individuals but not others. It combines two disciplines to understand how ecological processes (when are novel proteins more successful?) can drive evolution (when do new proteins proliferate in the genome?). Insight will be gained into how populations might rapidly evolve reproductive traits to adapt to rapid changes in the abundance of species. It will also provide data on how reproductive behavior can influence the association between interacting genes. Students, particularly those from underrepresented groups, will be trained in molecular biology and field ecology. Understanding the evolution of reproductive compatibility may help in the management of small populations and captive breeding for species of conservation interest.
Theory predicts that gamete recognition might be relaxed when population density is low and gamete competition is relaxed. Fertilization experiments will examine how specific sperm and egg proteins interact to determine reproductive compatibility and how patterns of sperm availability influence selection on these proteins. Sea urchins provide a model system for exploring these questions that would be impossible in species, such as mammals, with internal fertilization. The ability to age sea urchins, which can live for over 200 years, coupled with long-term data on human-driven changes in sea otter population density enables this unique historical study of evolution in action. This research will provide key insights into why some males and females have increased reproductive compatibility and why selection often favors the evolution of incompatible types. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95714
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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: | |
Don Levitan. Contemporary co-evolution of gamete recognition proteins. 2013-01-01.
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