Transgenic Potato with PVY Coat Protein Gene and Its Small-Scale Field Test Amplification of Soybean Mosaic Virus Coat Protein Gene by Polymerase Chain Reaction and Its Sequence Analysis Three Coat Protein Gene-Mediated Resistance to Lily Viral Diseases Cloning and Sequencing of the Gene Encoding Coat Protein of Potato Virus Y The cDNA Cloning and Nucleotide Sequence of Potato Virus X Coat Protein Gene