PLANTING METHOD FOR IDENTIFYING COMBINING ABILITIES OF MAIZE DH LINES

The invention provides a planting method for identifying combining ability of corn DH lines. The method comprises the following steps: firstly, dividing the to-be-identified corn DH lines into early maturing, medium maturing and late maturing according to the number of leaves of the DH lines, and then dividing each type of the to-be-identified corn DH lines into an NSS group and an SS group according to heterosis groups; and after classification, planting the to-be-identified corn DH lines in planting areas corresponding to the ripening period and the consanguinity of the to-be-identified corn DH lines. The number of planting holes in each corn DH line planting field is 5-8, pollination is performed according to the section direction during pollination, female ears of different DH lines can be pollinated with the same pollen, operation is easy, the pollen is not prone to being polluted, errors are not prone to occurring, the requirement for pollination workers is low, and working efficiency is high; and harvesting is conducted in the row direction during harvesting, different combinations of the same DH line can be collected into one group, the groups are clear during subsequent identification of combining ability, manual grouping and classification are not needed any more, and therefore, a large amount of labor is saved. The identification method is simple and rapid to operate, identification time is saved, and breeding cost is saved.