Characteristics of asexual spore germination and growth of Ustilaginoidea virens in different media Resistant difference of indica rice hybrid varieties to rice false smut STUDIES ON THE INFECTION PERIOD AND THE INFECTION GATE OF THE CHLAMYDOSPORES OF USTILAGINODEA VIRENE(COOKE)TAK.ON RICE Artificial inoculation techniques of rice false smut in greenhouse Infection of Ustilaginoidea virens intercepts rice seed formation but activates grain-filling-related genes Analysis of Quantitative Trait Loci for Resistance to Rice False Smut Analysis of cultural characteristics and genetic diversity of Ustilaginoidea virens from some regions in China