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玉米杂交种哲单20以自选系哲773-2G为母本,外引系铁7922为父本杂交选育而成。该品种生育期126d,需≥10℃活动积温2750~2800℃,属中晚熟杂交种具有高产稳产抗病抗逆性强活秧成熟等特点
Zhendan 20, a maize hybrid, was bred from male parent Zhe 773-2G and from male parent 7922 as male parent. The variety has a growth period of 126 days, and its accumulated accumulated temperature of ≥10 ℃ is 2750 ~ 2800 ℃. It is a hybrid of middle and late-maturing varieties with high and stable yield, strong disease resistance and strong seedling maturity