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广泛引进、研究、创新和利用外来玉米种质资源对拓宽我国玉米种质基础,不断提高玉米育种水平和效率,推动玉米生产的发展均起到不可代替的作用[1]。近年来,黑龙江省中、早熟玉米育种中用南5(81-5)自交
The extensive introduction, research, innovation and utilization of exotic maize germplasm resources have played an irreplaceable role in broadening the base of maize germplasm in China, continuously improving the level and efficiency of maize breeding and promoting the development of maize production [1]. In recent years, Heilongjiang Province, early maize breeding with South 5 (81-5) self