Abstract
Bioinformatics and RT-PCR analysis of RNA from four Lentinula edodes samples identified 22 different virus-like contigs comprising 15 novel and 3 previously reported viruses. We further investigated the Lentinula edodes negative-stranded RNA virus 1 (LeNSRV1) isolated from a symptomatic sample, whose virion is a filamentous particle with a diameter of ~15 nm and a length of ~1200 nm. RT-PCR analysis detected LeNSRV1 in 10 of the 56 Chinese L. edodes core collection strains and 6 of the 22 monokaryotic strains from the L. edodes strain HNZMD. Genetic variation analysis showed that the sequences encoding the nucleocapsid protein (ORF2) from all the aforementioned LeNSRV1 positive strains are very conservative. The results presented here may enrich our understanding of L. edodes virus diversity and the characteristics of LeNSRV1, and will promote further research on virus-host interaction in L. edodes.
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