Genetic Variation in Sixty-Four Maize Inbred Lines in Relation to Maize Rough Dwarf Virus Molecular characterization of Rice black-streaked dwarf virus isolates causing maize rough dwarf disease in Henan Efficient and accurate artificial inoculation technique of Rice black-streaked dwarf virus to maize Mining and Analyzing Genetic Diversity for Maize Rough Dwarf Disease Resistant Gerplasms and Its Application in Maize Breeding Advance in researches on rice black-streaked dwarf disease and maize rough dwarf disease in China Biology of maize rough dwarf virus and the strategies for improvement of maize resistant varieties