Optimizing Multiple Detection and Phylogenetic Studies on Grapevine leafroll associated virus-3 and Grapevine virus A Optimizing Multiple Detection and Phylogenetic Studies on Grapevine leafroll associated virus-3 and Grapevine virus A Multiplex RT-PCR for Simultaneous Detection of Four Grapevine Viruses Multiplex RT-PCR for Simultaneous Detection of Four Grapevine Viruses Prokaryotic expression of Grapevine virus A coat protein and antiserum preparation RT-PCR detection and sequence analysis on three grapevine viruses from Xinjiang Uyghur Autonomous Region Resistance to Grapevine virus B mediated by Schizosaccharmyces pombe pac1 gene Molecular identification and gene sequence analysis of Grapevine virus E Cloning and Prokaryotic Expression of CP Gene of Grapevine Virus A Sichuan Isolate