| 项目编号: | 1406366
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| 项目名称: | DISSERTATION RESEARCH: Possible evolution of a novel ZW chromosome system in a hybrid laboratory population of the copepod Tigriopus californicus |
| 作者: | Suzanne Edmands
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| 承担单位: | University of Southern California
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| 批准年: | 2013
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| 开始日期: | 2014-06-01
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| 结束日期: | 2016-05-31
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| 资助金额: | USD19972
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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: | sex chromosome
; hybrid population
; evolution
; population
; original population
; marine crustacean tigriopus californicus
; project
; entire chromosome
; hybridization-induced genomic disruption
; sex determination mechanism
; zw female
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| 英文摘要: | Among sexually reproducing organisms, the allocation of maleness and femaleness to offspring occurs in many ways, most familiarly, via sex chromosomes (XX females and XY males in humans, flies; ZW females and ZZ males in birds, butterflies). Although closely-related species often differ in their sex determination mechanisms, why those evolve is poorly understood. The marine crustacean Tigriopus californicus has many genetically isolated populations and polygenic (genetic, but non-chromosomal) sex determination. Previous work with a laboratory-created hybrid population revealed that females, but not males, are often heterozygous across an entire chromosome (bearing one copy from each original population), suggesting that it could be acting as a Z/W sex chromosome. This project will use next-generation DNA sequencing on individuals from this hybrid population and its wild progenitors to identify identify the sex determination mechanism in each population and to ascertain whether the hybrid population has evolved a novel sex chromosome.
This project investigates the genetic basis of sex determination in copepods, one of the most abundant animal groups on the planet. Sex chromosomes are a predictable outcome of evolution. The emergence of a sex chromosome in a hybrid population would suggest that sex determination mechanism switches could be a consequence of hybridization-induced genomic disruption. This is especially important in light of the increasing hybridization occurring in natural populations due to human-driven processes, such as species introductions and climate change-induced range shifts. In addition, the project will include extensive mentoring of undergraduates, and an evolution and science communication workshop at the Aquarium of the Pacific, Long Beach, CA |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/96788
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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: | |
Suzanne Edmands. DISSERTATION RESEARCH: Possible evolution of a novel ZW chromosome system in a hybrid laboratory population of the copepod Tigriopus californicus. 2013-01-01.
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