| 项目编号: | 1464471
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| 项目名称: | CAREER: Polyploid speciation in the Achillea millefolium aggregate |
| 作者: | Justin Ramsey
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| 承担单位: | Black Hills State University
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| 批准年: | 2013
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| 开始日期: | 2014-08-22
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| 结束日期: | 2016-01-31
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| 资助金额: | USD143792
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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: | project
; polyploid
; polyploid population
; polyploid plant
; polyploid speciation
; urban forest
; new polyploid mutant
; naturally-occurring polyploid lineage
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| 英文摘要: | Nearly all animals are diploid, i.e., they have two sets of chromosomes. In contrast, many plants are polyploid and have four or more sets of chromosomes, yet the role of polyploidy in speciation remains sharply debated. Polyploid plants that cannot interbreed with diploid plants are rarely recognized as different species, in large part because it is uncertain whether diploids and polyploids are ecologically distinct. This project combines field observations and transplant experiments to investigate reproductive barriers between diploid and polyploid populations of wild yarrow, a native perennial wildflower, and rigorously test the nature of polyploid speciation. The project will use naturally-occurring polyploid lineages and new polyploid mutants that arise spontaneously within diploid populations to separate the effects of ecological divergence and ploidy-based barriers on reproductive isolation.
This project has broad implications for the interpretation of global biodiversity patterns. Taxonomic recognition of polyploids, which are common at high latitudes, could double the number of flowering plant species and fundamentally alter understanding of species diversity, which is generally thought to be greatest in tropical regions. This project will involve faculty and graduate students not only in the laboratory and field research, but also in development of a public education and outreach program on urban forests and their conservation. Urban forests provide critical habitat for wildlife as well as recreational opportunities for urban and suburban citizens, yet are increasingly threatened by habitat fragmentation and invasive organisms. The project will develop urban forests as sites of formal and informal biology education and as a public resource. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95946
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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: | |
Justin Ramsey. CAREER: Polyploid speciation in the Achillea millefolium aggregate. 2013-01-01.
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