报告题目：

Divergence With Genetic Exchange - An Evolutionary Stimulus for Adaptive Change

报告人：

Michael Lynn Arnold

Department of Genetics, University of Georgia, Athens, GA 30602, USA

摘要：

Genetic exchange between divergent evolutionary lineages, from introgressive hybridization between locally adapted populations to insertion of retroviral sequences into eukaryotic genomes, has now been documented. The detection of frequent divergence-with-gene-flow contrasts the neo-Darwinian paradigm of largely allopatric diversification. Nevertheless, of even greater significance is the growing wealth of data suggesting that the recipients of the transferred genomic material gain adaptive phenotypes from the donor lineages. This adaptive enrichment is reflected by changes in pathogenicity in viruses and bacteria, the transformation of ecological amplitude in eukaryotes, and adaptive radiations in extremely diverse lineages. Although genetic exchange may produce maladaptive consequences, most of the recently reported examples suggest increases in fitness, and many such adaptive trait transfers have been identified in our own species.

报告时间：2018年8月15日（周三）下午4:00

报告地点：生物楼313会议室

报告人简介：

Michael Lynn Arnold是国际知名的进化遗传学家、美国国家科学促进会（American Association for the Advancement of Science, AAAS）院士、美国乔治亚大学杰出研究教授。Arnold 教授发表了数十篇重要的进化遗传研究论文、综述，并发表了几本关于杂交（遗传交换）与适应性转变及生物多样性形成的专著。