Breeding method of drought-resistant and disease-resistant corn

The invention relates to the technical field of corn breeding, in particular to a breeding method of drought-resistant and disease-resistant corn. The method specifically comprises the following steps: (1) respectively hybridizing drought-tolerant corn as a female parent and different northern leaf blight resistant corn as male parents to form a plurality of hybrid groups, selecting one of the hybrid groups as a target group, and separately harvesting F1-generation corn seeds of the target group and a non-target group; (2) respectively planting F1-generation corn seeds of the target group and the non-target group obtained in the step (1), collecting pollen of the non-target group, and mixing the pollen with a pollination adjuvant to obtain a pollen suspension; and (3) pollinating a target group with the pollen suspension obtained in the step (2), harvesting F2-generation corn seeds, and realizing stable selfing. According to the breeding method disclosed by the invention, the corn variety capable of resisting