Virulence patterns in populations of Erysiphe graminis f.sp. hordei in Europe in 1986
Virulence patterns in populations of Erysiphe graminis f.sp. hordei in Europe in 1986
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禾白粉菌专化型 (Erysiphe graminis f.sp.) 种群的毒力模式。
DOI：
10.1111/j.1365-3059.1990.tb02516.x
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
G. Fischbeck
中科院分区：
文献类型：
--
作者：
E. Limpert;D. Andrivon;G. Fischbeck
共获得3166个白粉菌的单菌落后代。在实验室对来自西欧68个地区的大麦抗病基因mlra、mlg、mla6+mlg的致病力进行了分析。Mila，Mla7+MLK，Mlall，Mla9，MlaI3+MlRu3。MLAL、MLA3和MLO。未检测到对MLO有毒力的菌株。观察到大多数其他毒力基因的频率具有不同的区域模式。他们强调了种植品种所发挥的选择作用，以及风对霉菌种群传播的影响。丹麦新出现的Val3毒力进化的早期阶段的数据特别好地说明了这两种现象。与之前的进化相比，广泛分布的毒力(Va6)的频率有了相当大的下降；最可能的原因被概述了。
A total of 3166 single colony progeny of Erysiphe graminis f.sp. hordei, constituting random samples of the aerial inoculum from 68 regions of Western Europe, were analysed in the laboratory for virulence to barley resistance genes Mlra, Mlg, Mla6+Mlg. MILa, Mla7+Mlk, Mlall, Mla9, MlaI3 + MlRu3. Mlal, Mla3 and mlo. No isolate virulent to mlo was detected. Distinct regional patterns were observed for the frequencies of most of the other virulence genes. They stressed the role of selection exerted by the cultivars grown, as well as the effect of wind dissemination of mildew populations. These two phenomena are particularly well exemplified by the data on early stages in the evolution of the newly emerging Val3 virulence in Denmark. In contrast with the preceding evolution, there was a considerable decrease of the frequency of a broadly distributed virulence (Va6); the most probable reasons for this are outlined.