The 1.6 and 1.8 kbp dsRNAs have been found in the rice blast fungus, Magnaporthe grisea strain MG01. These dsRNA molecules are located in cytoplasm of the fungal cells and maintained stably during vegetative growth. Three crosses between dsRNA free and dsRNA containing strains including a parental cross, sib-mating and back cross were made to follow the inheritance of dsRNAs during sexual reproduction. Approximately 10% of ascospore progenies (11 out of 105) contained dsRNAs from all three crosses. These data indicate that dsRNAs of M. grisea are inherited at a low frequency and not in a Mendelian fashion.
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Chun et al. (2006) studied this question.
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