| grouping and comparison of indian citrus tristeza virus isolates based on coat protein gene sequences and restriction analysis patterns. | citrus tristeza virus (ctv) is an aphid-transmitted closterovirus, which causes one of the most important citrus diseases worldwide. isolates of ctv differ widely in their biological properties. ctv-infected samples were collected from four locations in india: bangalore (ctv-b), delhi (ctv-d), nagpur (ctv-n), and pune (ctv-p), and were maintained by grafting into kagzi lime ( citrus aurantifolia (christm. swing.). all isolates produced typical vein clearing and flecking symptoms 6-8 weeks after ... | 2003 | 12664295 |