| a novel mycovirus associated with four double-stranded rnas affects host fungal growth in alternaria alternata. | four double-stranded rnas (dsrnas), referred to as dsrna 1 (3617 bp), dsrna 2 (2794 bp), dsrna 3 (2576 bp) and dsrna 4 (1420 bp), were detected in the egs 35-193 strain of alternaria alternata at high concentration ( approximately 3 microg/g dried mycelium). this strain had an impaired growth phenotype. by exposing the strain to cycloheximide during hyphal tip isolation, we isolated strains which had normal mycelial growth and pigmentation, in which decreased levels of the dsrnas were observed ( ... | 2009 | 19118588 |