The invention relates to the technical field of corn breeding, in particular to a method for breeding drought-enduring male parent
germplasm based on a corn PB group. The method comprises the following steps: mixing PB group drought-resistant corn
germplasm with a male
parent material to construct a
germplasm improvement basic group, and
selfing to generate an S1 generation; performing inter-ear-row
drought resistance screening on the S1 generation in the
seedling stage, dividing the screened drought-resistant ear rows into two parts, respectively
transplanting the two parts, selecting ear rows correspondingly planted in a normal
irrigation area according to the identification result of the
drought resistance of the ear rows after planting in an
arid area, and performing
selfing to obtain an S2 generation and form a DH1 line; taking a small amount of DH1 lines to form a test
mating group TC1, performing multi-environment
drought resistance phenotype identification on the test
mating group TC1 and parent DH1 lines thereof, and respectively establishing whole
genome selection models; a whole
genome selection model is utilized to predict phenotypes of a large number of DH1 lines, and a screened excellent inbred line is a drought-resistant corn male parent germplasm. The invention aims to solve the problems of long breeding period, low selection efficiency and difficulty in balance of yield and
drought tolerance of the existing corn male parent germplasm.