Introduction aggregation breeding method of maize inbred line

The invention discloses an introduction aggregation breeding method of a maize inbred line, and belongs to the technical field of maize breeding. The problems of bad and regressive resistance and difficult seed selection of high disease resistance and high combining ability integrated inbred lines of present local dominant inbred lines are overcome in the invention. The method utilizes introduction aggregation to make maize backcross introduced and aggregated with favorable gene, a population improvement principle is utilized during the seed selection of backcross introduction of progeny population to realize the mixed pollination between excellent individual plants in separated population in order to increase favorable gene frequency, and the mixed pollination and inbred pollination are alternatively carried out until a stable excellent inbred line is formed, so the improvement in the small population, combining germplasm improvement with the inbred seed selection, makes many favorable additive genes aggrega