Shcolnick S, Dinoor A, Tsror Lahkim L
Department of Plant Pathology, Agriculture Research Organization, Gilat Experiment Station, M. P. Negev, 85280, Israel, and Department of Plant Pathology and Microbiology, Faculty of Agricultural, Food and Environmental Quality Sciences, Rehovot, 76100, Israel.
Department of Plant Pathology and Microbiology, Faculty of Agricultural, Food and Environmental Quality Sciences, Rehovot, 76100, Israel.
Plant Dis. 2007 Jul;91(7):805-808. doi: 10.1094/PDIS-91-7-0805.
Potato black dot, caused by Colletotrichum coccodes, damages tuber quality and may reduce yield. In previous work, four multimember vegetative compatibility groups (VCGs) have been reported. The objectives of the current study were to characterize a population of C. coccodes comprised of isolates from Israel and Northern Europe (EU/I) using VCG, and to assess the correlation between VCGs and aggressiveness of isolates on potato. A composite of 176 isolates was collected from symptomatic tissues of potato tubers or stems. A total of 6 (3.4%) isolates were characterized in VCG1; 29 (16.5%), 32 (18.2%), and 7 (4.0%) in VCG 2, 3, and 4, respectively; and 7 (4.0%), 9 (5.1%), 48 (27.3%), and 15 (8.5%) in the newly defined VCG 5, 6, 7, and 8, respectively. Twenty-three isolates (13%) were not assigned to any of the VCGs. Two of the VCGs had a specific geographical distribution: the 9 isolates assigned to VCG6 originated from The Netherlands, and 34 of 38 isolates assigned to VCG7 were from Scotland. Aggressiveness of isolates of a given VCG was examined on potato. VCGs 5 and 6 were comprised of the most aggressive isolates, and VCG1 of the least aggressive. These results could facilitate a more accurate evaluation of damage potential that may be caused by this pathogen.
由围小丛壳菌引起的马铃薯黑点病会损害块茎品质并可能降低产量。在之前的研究中，已报道了四个多成员营养体亲和群（VCG）。本研究的目的是利用VCG对一组来自以色列和北欧（欧盟/以色列）的围小丛壳菌分离株进行特征分析，并评估VCG与分离株对马铃薯的侵袭性之间的相关性。从马铃薯块茎或茎的症状组织中收集了176个分离株的混合样本。共有6个（3.4%）分离株被鉴定为属于VCG1；分别有29个（16.5%）、32个（18.2%）和7个（4.0%）属于VCG 2、3和4；而在新定义的VCG 5、6、7和8中，分别有7个（4.0%）、9个（5.1%）、48个（27.3%）和15个（8.5%）。23个分离株（13%）未被归入任何一个VCG。其中两个VCG具有特定的地理分布：归入VCG6的9个分离株来自荷兰，归入VCG7的38个分离株中有34个来自苏格兰。对特定VCG的分离株在马铃薯上的侵袭性进行了检测。VCG 5和6包含侵袭性最强的分离株，而VCG1的侵袭性最弱。这些结果有助于更准确地评估这种病原菌可能造成的损害潜力。
