To determine the biological characteristics of B.maydis race O in Fujian Province,three race O isolates,which were collected from Jianou,Shaxian and Fuzhou areas,were selected as represent-atives for
Fusarium graminearum hypovirus 1 (FgHV1),which is phylogenetically related to Cryphonectria hypovirus 1 (CHV1),is a virus in the family Hypoviridae that infects the plant pathogenic fungus F.graminear