Banke S, McDonald B A
Institute for Plant Sciences, Phytopathology Group, Federal Institute of Technology, ETH-Zentrum, LFW, Universitätstrasse 2, 8092, Zürich, Switzerland.
Mol Ecol. 2005 Jun;14(7):1881-96. doi: 10.1111/j.1365-294X.2005.02536.x.
DNA sequences from five nuclear loci and data from three microsatellites were collected from 360 isolates representing 14 globally distributed populations of the plant pathogenic fungus Mycosphaerella graminicola. Haplotype networks were constructed for the five sequence loci and population subdivision was assessed using Hudson's permutation test. Migration estimates were calculated using six regional populations for both the sequence and microsatellite loci. While subdivision was detected among the six regional populations, significant gene flow was indicated among some of the populations. The European and Israeli populations contributed the majority of historical immigrants to the New World. Migration estimates for microsatellite loci were used to infer more recent migration events among specific New World populations. We conclude that gene flow was an important factor in determining the demographic history of Mycosphaerella graminicola.
从代表植物病原真菌小麦壳针孢全球14个分布种群的360个分离株中收集了来自五个核基因座的DNA序列和三个微卫星的数据。构建了五个序列位点的单倍型网络，并使用哈德森排列检验评估了种群细分情况。利用六个区域种群对序列和微卫星基因座计算了迁移估计值。虽然在六个区域种群中检测到了细分情况，但在一些种群之间也显示出显著的基因流动。欧洲和以色列种群是新世界大多数历史移民的来源。微卫星基因座的迁移估计值被用于推断新世界特定种群之间最近的迁移事件。我们得出结论，基因流动是决定小麦壳针孢种群历史的一个重要因素。
