通知公告

生态与环境室学术报告通知(20140616)

时间:2014-11-03  来源: 文本大小:【 |  | 】  【打印

  报告题目: 

  Genome Evolution of a Versatile Lineage – From Cultures to Single Cell Genomics 

    

  报告人: 

  罗海伟 博士,University of Georgia, Department of Marine Sciences 

    

  报告人简介: 

  罗海伟博士本科毕业于厦门大学(2000-2004),之后在中科院生态环境研究中心读研究生(2004-2006)。随后在美国南卡罗莱娜大学获得海洋微生物学硕士(2006-2008)和分子进化生物学博士学位(2008-2010)。博士毕业后到佐治亚大学海洋学系做博士后研究。近几年的研究将分子进化生物学的理论和计算生物学的方法结合到海洋微型生物生态学中,是这个交叉领域为数不多的青年学者之一。 

    

  报告摘要: 

  In the past decade molecular microbial ecology has provided major insights into the genomic diversity of marine bacterioplankton, but we know little about how such diversity evolved. Phylogenomics and population genetics reveal the evolutionary processes giving rise to genetic diversity, but they have rarely been integrated into microbial ecology. In this talk, I will discuss the use of these theories and approaches to understand the genetic diversity of the dominant and metabolically versatile marine Roseobacter clade. Phylogenomic analyses showed that the patch-adapted Roseobacters experienced a significant genome innovation through lateral gene transfer, and the timing coincided with the diversification of modern eukaryotic phytoplankton about 250 million years ago. Population genetic analyses suggest that evolutionary processes of an uncultivated Roseobacter lineage toward streamlined genomes and low G+C content are explained equally well by genetic drift as by the more frequently invoked explanation of natural selection. Thus, evolutionary analyses gave insights into microbial genetic diversity. 

    

  时间:2014年6月17日(星期二),上午9:00 

  地点:生物楼4楼会议室 

    

  欢迎感兴趣的老师、同学参加! 

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