The results showed as follows: in Am3, there is a single recessive gene controlling the resistance to leaf rust race DHD; in Am4, theresistance gene is suppressed by the D genome.

• 结果表明Am3对叶锈菌生理小种DHD的抗性系由1对隐性基因控制:Am4中由于存在来自DD染色体组的抑制作用,其对叶锈菌生理小种DHD的抗病基因被抑制了。