定点采集汕优63、明恢63等主栽品种上的穗颈瘟,进行室内单孢分离培养变异致病菌株,混合喷雾接种,鉴定汕优22、汕优63和明恢63等品种和亲本的抗稻瘟性及产量。 测定结果表明,汕优63叶瘟病级5～9级、颈瘟病率31.2％～100％(病级7～9级)。汕优22叶瘟病为1～6级,发病率0.2％～17％(病级1～5级),叶瘟病级较汕优63降低3～4 Specimens were collected from Shanyou 63, Minghui 63 and other main cultivars for panicle blast. The mutants were isolated and cultivated with single spore inoculation and mixed spray inoculation to identify the varieties and parents of Shanyou 22, Shanyou 63 and Minghui 63 Blast resistance and yield. The results showed that the leaf blast of Shanyou 63 was between 5 and 9, and the rate of the disease was between 31.2% and 100% (grade 7-9). Shanyou 22 leaf blast for the 1 to 6, the incidence of 0.2% to 17% (disease grade 1 to 5), leaf blast lessened Shanyou 63 3 to 4