globalchange  > 影响、适应和脆弱性
项目编号: 1406721
项目名称:
DISSERTATION RESEARCH: Investigating the impact of hybridization on diversification: A case study in the plant genus Heuchera
作者: John Freudenstein
承担单位: Ohio State University
批准年: 2013
开始日期: 2014-07-01
结束日期: 2016-06-30
资助金额: USD15502
资助来源: US-NSF
项目类别: Standard Grant
国家: US
语种: 英语
特色学科分类: Biological Sciences - Environmental Biology
英文关键词: hybridization ; study ; hybrid ; project ; comparative study ; research method ; ancient hybridization ; genus heuchera ; several parallel case
英文摘要: Hybridization is broadly relevant because it is the basis for much of the diversity around us, including agricultural crops and pests. The existence of successful ancient natural hybrids between species challenges traditional notions in biology that hybrids are ephemeral dead-ends in the evolution of biodiversity. However, detecting ancient hybrids using genetic data is challenging since hybrids have a "mosaic" of genes possessing different underlying histories and traits.

In this project, the investigators will test hypotheses about ancient hybridizations, specifically whether Pleistocene glaciations have enabled hybridization by causing range shifts. The proposed work will be conducted within the genus Heuchera by comparing species richness between hybrid and parental lineages in several parallel cases that have been identified. This project analyzes Coral Bells (Heuchera) from a DNA and morphological perspective to investigate the long-term contribution of hybridization to evolution. The objectives of this study include (1) the discovery of hybrids, (2) examination of relative rates of species formation with parents, and (3) reconstruction of historical geographical ranges. This study contributes to scientific infrastructure through the provision of DNA sequences for comparative studies, data for the inference of evolutionary history, descriptions of new and rare species and varieties, and the creation of museum specimens and identification keys. The project includes training of undergraduates in research methods, the creation of pedagogical exercises for undergraduate classes, and public lectures on hybridization in general and on specific aspects of the project.
资源类型: 项目
标识符: http://119.78.100.158/handle/2HF3EXSE/96492
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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John Freudenstein. DISSERTATION RESEARCH: Investigating the impact of hybridization on diversification: A case study in the plant genus Heuchera. 2013-01-01.
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