| 项目编号: | 1601323
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| 项目名称: | DISSERTATION RESEARCH: Chromosome inversions and reproductive isolation in an avian hybrid zone |
| 作者: | Trevor Price
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| 承担单位: | University of Chicago
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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: | 2017-05-31
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| 资助金额: | 19693
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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: | hybrid zone
; researcher
; hybridization
; genome
; several large chromosome inversion
; same chromosome
; chromosome inversion
; narrow contact zone
; narrow zone
; subspecy
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| 英文摘要: | Scientists' understanding of the way in which two species arise from a common ancestor has greatly improved since the time of Darwin. We now know that the most common way species form is when different populations become geographically separated from each other and begin to genetically diverge. We also know that this process can take millions of years. But at any time, during the process of splitting, populations may come back into contact and form a narrow zone of contact where individuals from one group mate with individuals from the other group (a hybrid zone). While hybridization generally leads to a slowdown in the rate at which new species form because their genomes are no longer separate, several mechanisms have been identified whereby hybridization can actually promote divergence. This project focuses on the evolution of chromosome inversions, rearrangements to the structure of the genome that act as genetic barriers between young species that share some gene exchange in narrow hybrid zones. This information is critical to understanding the natural consequences of geographic divergence, periodic gene exchange, speciation, and the resulting biodiversity that is present on Earth. Education-related public outreach efforts at the Field Museum of Natural History, where the research takes place, will involve Chicago area high school and undergraduate students.
These researchers study a hybrid zone between subspecies of the long-tailed finch (Poephila acuticauda). Subspecies differ in beak color (yellow vs. red) and hybridize across a narrow contact zone in northern Australia. Genetic differences between subspecies are largely restricted to one chromosome. Several large chromosome inversions are on the same chromosome. The researchers will examine the genomes of individual birds from across the hybrid zone to identify the genes encoding a reproductive isolating trait: beak color. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92190
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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: | |
Trevor Price. DISSERTATION RESEARCH: Chromosome inversions and reproductive isolation in an avian hybrid zone. 2016-01-01.
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