Urediospores of patents culture, predominant race CY17-5 and CY31-3 were treatedby EMS, induce mutant were screened on the Chinese differential cultivars and thenear-isogenic lines (NILs) of rust.

• 17M2对维尔发生了毒性突变； 17M3 对南大 2419 发生了毒性突变；