Extent and genomic basis of plant adaptation

植物适应的程度和基因组基础

• 批准号: 312492-2010
• 负责人: Wright, Stephen
• 金额: $ 3.93万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=548762
• 关键词: Extent; genomic; basis; plant; adaptation

What fraction of genomic differences between species are due to adaptive evolution? How do changes in the DNA sequence of organisms lead to adaptation and evolution? How much adaptive evolution occurs in natural populations? How much is the strength of natural selection dependent on the evolutionary history and demography of natural populations? Recent advances over the last several years in genome technology and genomic resources are allowing for unprecedented opportunities to explore these questions using genomic approaches. The proposed research aims to examine the genetic causes and extent of natural selection in plant genomes, with a focus on species in the mustard family. This plant family, which includes the important Canadian crop plant canola, has several advantages, particularly a wealth of genetic and genomic resources. The research includes surveys of genome-wide patterns of DNA sequence diversity, which are fit to evolutionary models to make inferences about the rate, strength, and location of natural selection. A second component of the research involves genetic mapping using between-species crosses to identify the regions of the genome important in floral evolution. By combining the results, we can gain new insights into the evolutionary forces and genetic causes of speciation and floral evolution. Third, we will use population genomics from a number of species to test for the role of natural selection in driving the evolution of genome size. Research in my laboratory gives students diverse training in cutting-edge techniques at the interface of genomics, genetics, and evolutionary biology.

物种之间的基因组差异中有多少是由于适应性进化造成的？生物体DNA序列的变化如何导致适应和进化？自然种群中有多少适应性进化发生？自然选择的强度在多大程度上取决于自然种群的进化历史和人口统计学？最近几年在基因组技术和基因组资源方面取得的进展为使用基因组方法探索这些问题提供了前所未有的机会。这项拟议中的研究旨在研究植物基因组中自然选择的遗传原因和程度，重点是芥菜家族的物种。该植物家族包括重要的加拿大作物植物卡诺拉，具有几个优势，特别是丰富的遗传和基因组资源。该研究包括对DNA序列多样性的全基因组模式的调查，这些模式适合进化模型，以推断自然选择的速度，强度和位置。 研究的第二个组成部分涉及使用物种间杂交的遗传图谱，以确定基因组中对花卉进化重要的区域。通过结合这些结果，我们可以对物种形成和花进化的进化力量和遗传原因获得新的见解。第三，我们将使用一些物种的群体基因组学来测试自然选择在驱动基因组大小进化中的作用。在我的实验室的研究给学生在基因组学，遗传学和进化生物学的接口尖端技术的各种培训。