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“郑单7号”是河南省农科院粮食所于1981年用“107”作母本,以“风直”作父本配制而成的玉米单交种。1982年夏播鉴定试验亩产656.3公斤,比“郑单2号”增产72%。
“Zheng Dan No. 7” is the corn variety of Henan Province Academy of Agricultural Sciences in 1981 with “107” as the mother of the “wind straight” as the father of the preparation of maize single cross. Summer 1982 sowing test 656.3 kilograms of certified test, than the “Zhengdan 2” 72% increase in yield.