Abstract
Three hundred and thirty-nine rice varieties and strains from various origins were tested for resistance to stripe disease by the "seedling test method." All the Japanese paddy varieties tested were susceptible, while the Japanese upland varieties were highly resistant with a few exceptions. Among foreign varieties, all of the Japonica type were susceptible, and most of the Indica type were resistant. Some Japanese upland strains, which were derived from the hybrids between Japanese paddy and upland rice varieties, were recognized as suitable parents for transferring stripe resistance to the Japanese paddy rice.
