Genetic variability among Alternaria solani isolates from potatoes in Southern Germany based on RAPD-profiles

被引:12
|
作者
Leiminger, Juergen H. [1 ]
Auinger, Hans-Juergen [2 ]
Wenig, Marion [3 ]
Bahnweg, Guenther [3 ]
Hausladen, Hans [1 ]
机构
[1] Tech Univ Munich, Lehrstuhl Phytopathol, D-85350 Freising Weihenstephan, Germany
[2] Tech Univ Munich, Lehrstuhl Pflanzenzuchtung, D-85350 Freising Weihenstephan, Germany
[3] Helmholtz Zentrum Munchen, German Res Ctr Environm Hlth, Inst Biochem Plant Pathol, D-85764 Neuherberg, Germany
关键词
early blight; intraspecific variation; pathogen population; Solanum tuberosum; POPULATION-GENETICS; DIVERSITY; TOMATO; DNA; MUTATION; ISOZYME; MARKERS;
D O I
10.1007/BF03356470
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
One of the problems encountered when studying the population genetics of fungal plant pathogens is defining what constitutes a "population". Potato early blight is a major disease of potatoes and other species of the Solanaceae. The causal agent is the ascomycete Altemaria solani, which infects leaves and stems of potato plants leading to premature defoliation. In this study, spatial genetic diversity within A. solani populations from potato leaves were investigated using RAPD markers in order to reveal the degree of homo- or heterogeneity. Analysis of RAPD profiles revealed distinct genetic diversity among isolates originating from the same field. In addition, pronounced genetic variability was found for isolates from different years. These results indicate a surprising genetic heterogeneity within the population of A. solani, which must be kept in mind when designing protective measures for agriculture.
引用
收藏
页码:164 / 172
页数:9
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