Stukenbrock Eva H, Banke Søren, McDonald Bruce A
Institute of Integrative Biology, Plant Pathology, ETH Zurich, LFW, Universitätstrasse 2, CH-8092 Zurich, Switzerland.
Mol Ecol. 2006 Sep;15(10):2895-904. doi: 10.1111/j.1365-294X.2006.02986.x.
The global migration patterns of the fungal wheat pathogen Phaeosphaeria nodorum were analysed using 12 microsatellite loci. Analysis of 693 isolates from nine populations indicated that the population structure of P. nodorum is characterized by high levels of genetic diversity and a low degree of subdivision between continents. To determine whether genetic similarity of populations was a result of recent divergence or extensive gene flow, the microsatellite data were analysed using an isolation-with-migration model. We found that the continental P. nodorum populations diverged recently, but that enough migration occurred to reduce population differentiation. The migration patterns of the pathogen indicate that immigrants originated mainly from populations in Europe, China and North America.
利用12个微卫星位点分析了小麦真菌病原体小麦褐霉病菌的全球迁移模式。对来自9个种群的693个分离株的分析表明，小麦褐霉病菌的种群结构具有高度的遗传多样性和较低的大陆间分化程度。为了确定种群的遗传相似性是近期分化还是广泛基因流动的结果，使用隔离-迁移模型对微卫星数据进行了分析。我们发现，大陆上的小麦褐霉病菌种群最近才发生分化，但发生了足够的迁移以减少种群分化。病原体的迁移模式表明，移民主要来自欧洲、中国和北美的种群。
