Studies on Methods for Selecting and Evaluating Rice Varieties with Durable Blast Resistance
Xiao Fang-hua · Hunan Agricultural Sciences · 2003
Experiments indicated the effective way for evaluating rice germplasm with durable resistance to rice blast includes: to collect rice materials which well grow in the disease- attacked areas, screen them in typical blast nurseries at different latitudes and detemine their major resistant factors and resistance spectrum. Those varieties (lines) passing this series of time - space tests will be evaluated as certificated rice materials with durable blast resistance. The results indicate spore layer grade index in seedling's lesions, spore amount, severity of leaf blast and neck blast in adult plants or seedlings are the four major indices for the durable blast resistance evaluation.