DISSERTATION RESEARCH: Evolutionary Genomics of Hybrid Speciation and Divergence

论文研究：混合物种形成和分化的进化基因组学

• 批准号: 0508555
• 负责人: Loren Rieseberg
• 金额: --
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-15 至 2006-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0508555&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Evolutionary; Genomics; Hybrid

What evolutionary forces govern the patterns of biodiversity found in nature? This question will be addressed using the sunflower Helianthus deserticola as a study organism. Helianthus deserticola is a hybrid species, the end product of an ancient cross between the two parental species. Studying the origin and divergence of H. deserticola from its parental species provides an opportunity to elucidate the contribution of two major evolutionary factors, hybridization and natural selection, to biodiversity. This project employs genome-level techniques to broadly survey the genetics of the hybrid species and the parental species. It will identify genes that enabled the hybrid species to adapt to an extreme environment, and also reveal how gene expression in the hybrid species differs from the parental species.This work is of broad relevance in both basic and applied biology. Understanding the causes of biodiversity is a challenging question in evolutionary biology. The study organism is watch-listed as a sensitive plant, and will therefore provide important information for conservation biology. Finally, there is strong interest in the preservation of rare sunflowers as a resource for crop breeding, and these species are likely to have a strong economic impact on the US sunflower crop in the future.

什么样的进化力量支配着自然界中的生物多样性模式？ 这个问题将使用向日葵作为研究生物体来解决。 沙漠向日葵是一种杂交物种，是两个亲本物种之间古老杂交的最终产物。 研究了H. deserticola从其亲本物种中分离出来，这为阐明杂交和自然选择这两个主要进化因素对生物多样性的贡献提供了机会。 该项目采用基因组水平的技术，广泛调查杂交物种和亲本物种的遗传学。 它将鉴定使杂交物种能够适应极端环境的基因，并揭示杂交物种中的基因表达与亲本物种的差异。这项工作在基础生物学和应用生物学方面都具有广泛的相关性。 了解生物多样性的原因是进化生物学中一个具有挑战性的问题。 该研究生物被列为敏感植物，因此将为保护生物学提供重要信息。 最后，人们对保存稀有向日葵作为作物育种资源有着浓厚的兴趣，这些物种很可能在未来对美国向日葵作物产生强大的经济影响。