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从轮回选择法改良的玉米育种群体中，选育出了配合力高、抗病性强的玉米新自交系ＺＡ５７１６和ＺＡ６１９２。利用其作亲本，育成张单２５１、张单４７６等４个玉米新杂交种在生产上推广应用。
Maize inbred lines ZA5716 and ZA6192 with high combining ability and disease resistance were bred from maize breeding population improved by recurrent selection method. Using their parents, bred Zhangdan 251, Zhangdan 476 and other four new maize hybrids in the production of popularization and application.