Abstract: 18 wheat cultivars or lines and 27 Lr gene lines are inoculated with 15 cultures of Puccinia recondita f. sp. tritici respectively for postulating resistance genes based on infection types. The wheat cultivars or lines may be sorted into 7 groups on the basis of reaction to P. recondita f. sp. tritici shown by the Lr gene lines. (1)CA8646 carries Lrl5; (2)Henong’ai 3 carries Lr26, and 87-4314 Sui 13 seems to have Lrl5 and Lr26;(3)Tang 86-4043 may carry Lr2a or Lr26; (4)Baomai 2 and Shandong 03201 carry Lr1 and Lr26, and Shandong 110021 has Lr1; (5)C4102-5 may have either one or more genes of Lr21, Lr23, Lr25, and Lr27; (6) 6 cultivars or lines, such as Fengkang 9 , etc, seem to possess additional resistance genes which did not includ in the Lr gene lines studied; and( 7 )4 cultivars or lines, such as Jizao 15, etc, do not seem to have any resistance genes to the cultures studied.

Key words: Wheat, Puccinia recondita f. sp. tritici, Leaf rust, Resistance genes