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以骨干自交系长3与5003杂交后与长3回交,选育出了配合力高、抗病性强、早熟和综合性状好的新自交系K10、HR25和HR3。用其作亲本,育成龙单13、龙单20和黑342等玉米杂交种在生产上大面积推广应用。K10已成为黑龙江省玉米育种的骨干自交系之一。
New inbred lines K10, HR25 and HR3 with high combining ability, strong disease resistance, early maturity and good comprehensive traits were bred by backcrossing between long 3 and 5003 and back 3 long. Using it as a parent, Yulong single 13, Longdan 20 and black 342 and other maize hybrids in the production of large-scale promotion and application. K10 has become one of the backbone inbred lines of maize breeding in Heilongjiang Province.