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Abstract
Consequences of selfreproduction (intramictic reproduction) were studied on a wild Agaricus bisporus var. bisporus strain. Individual variations were observed on several agronomic traits, natural cap color, susceptibility to bacterial blotch, mycelial growth and yield, for each of the two studied intramictic generations. RAPD markers showed a high level of recombination between intramictic generations. With all traits, the same level of transgression was obtained at each generation, with the exception of mycelial growth which dramatically increased in the first generation. Bacterial blotch susceptibility decreased, reaching a threshold, therefore resistance was not reached. Variability induced by intramictic reproduction in A. bisporus could be integrated favorably in breeding programs.