A novel virus that infecting hypovirulent strain XG36-1 of plant fungal pathogen Sclerotinia sclerotiorum | Virology Journal BioMed Central Research A novel virus that infecting hypovirulent strain XG36-I of plant fungal pathogen Sclerotinia sclerotiorum Liyan Zhang 1 2 Yanping Fu2 Jiatao Xie2 Daohong Jiang 1 2 Guoqing Li1 2 and Xianhong Yi2 Open Access Address 1State Key Laboratory of Agricultural Microbiology Huazhong Agricultural University Wuhan 430070 Hubei Province PR China and 2The Provincial Key Lab of Plant Pathology of Hubei Province College of Plant Science and Technology Huazhong Agricultural University Wuhan 430070 Hubei Province PR China Email Liyan Zhang - zhangliyan@ Yanping Fu - yanpingfu@ Jiatao Xie - jiataoxie@ Daohong Jiang - daohongjiang@ Guoqing Li - guoqingli@ Xianhong Yi - xianhongyi@ Corresponding author Published 7 July 2009 Received 26 May 2009 Virology Journal 2009 6 96 doi 186 1743-422X-6-96 Accepted 7 July 2009 This article is available from http content 6 1 96 2009 Zhang et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Sclerotinia sclerotiorum is a notorious plant fungal pathogen which spreads across the world. Hypovirulence is a phenomenon where the virulence of fungal pathogens is decreased even lost due to mycovirus infection. The potential of hypoviruses for biological control of the chestnut blight fungus Cryphonectria parasitica has attracted much interest and has led to discovery of new hypovirulent strains in other fungi. Results A hypovirulent strain strain XG36-1 was isolated from a typical lesion on the stem of rapeseed Brassica napus caused by Sclerotinia sclerotiorum. Strain XG36-1 grew on PDA very slowly average mm d with sectoring .