甘玉早803玉米新品种是以自选系GZ89为母本、GZ70为父本育成的极早熟玉米杂交种。2016 — 2017年参加甘肃省旱作玉米极早熟品种区域试验，平均折合产量9 093.0 kg/hm2，比对照品种德美亚2号 增产 5.6%。籽粒含粗蛋白99.9 g/kg、粗脂肪52 g/kg、粗淀粉713.3 g/kg、赖氨酸2.6 g/kg、容重794 g/L。属优质玉米，高抗丝黑穗病。可在甘肃极早熟春玉米区推广种植。

Ganyuzao 803 is a new corn hybrid，with parents combination of self-bred inbred line GZ89 and GZ70. In 2016 — 2017， the average yield was 9 093 kg/hm2， 5.6% higher than the control Demeiya 2 in Gansu Extremely Early Maturity Dry-land Corn Regional Trial. The crude protein of grain, crude fat， crude starch， lysine and bulk weight are 99.9 g/kg， 52 g/kg， 713.3 g/kg， 2.6 g/kg and 794 g/L， respectively. It is a high-quality corn， high resistant to silk smut. It can be widely planted in the region of extremely early spring corn of Gansu Province.

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