Abstract:The resistant varieties used in this study were Shaan 401, Shaan3563, Shaan 5245, Shaan 3053, Shaan 5710, and Shaan 1155, the susce-ptible varieties were Deltapine SR--1, Baiyin 2, Acala 3080, Acala 1517/E, RAB 25 and RAB 26. These cultivars were combined in an 6x6 in-complete diallel design. The he