Premium
Inter‐simple sequence repeat and aggressiveness analyses revealed high genetic diversity, recombination and long‐range dispersal in Fusarium culmorum
Author(s) -
MISHRA PRASHANT K,
FOX ROLAND T V,
CULHAM ALASTAIR
Publication year - 2003
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.2003.tb00297.x
Subject(s) - biology , fusarium culmorum , genetic diversity , biological dispersal , intraspecific competition , microsatellite , genotype , range (aeronautics) , genetic variation , genetics , botany , veterinary medicine , allele , ecology , fusarium , population , gene , demography , medicine , materials science , composite material , sociology
Summary Inter‐simple sequence repeat (ISSR) analysis and aggressiveness assays were used to investigate genetic variability within a global collection of Fusarium culmorum isolates. A set of four ISSR primers were tested, of which three primers amplified a total of 37 bands out of which 30 (81%) were polymorphic. The intraspecific diversity was high, ranging from four to 28 different ISSR genotypes for F. culmorum depending on the primer. The combined analysis of ISSR data revealed 59 different genotypes clustered into seven distinct clades amongst 75 isolates of F. culmorum examined. All the isolates were assayed to test their aggressiveness on a winter wheat cv. ‘Armada’. A significant quantitative variation for aggressiveness was found among the isolates. The ISSR and aggressiveness variation existed on a macro‐ as well as micro‐geographical scale. The data suggested a long‐range dispersal of F. culmorum and indicated that this fungus may have been introduced into Canada from Europe. In addition to the high level of intraspecific diversity observed in F. culmorum , the index of multilocus association calculated using ISSR data indicated that reproduction in F. culmorum cannot be exclusively clonal and recombination is likely to occur.