种子是农业生产最基本最重要的生产资料和农业“芯片”，在农业生产中占有重要地位。通过对2020年黄淮海夏播区玉米联合体审定的产量前20位品种进行性状分析。结果表明，在选育和种植品种上，应选择比对照增产5.0%以上、抗穗腐病、千粒重在330g以上、容重720g/L以上、穗高系数等于或接近0.382、高淀粉（粗淀粉含量在72%以上）、赖氨酸含量在0.3%以上、中大穗（穗长在17.8cm以上）、穗行16左右的新品种；玉米生产发展趋势是全程机械化生产，试验应当增加玉米新品种籽粒含水量的相关数据，为农业生产选择玉米收获时籽粒含水量低的品种提供依据。

Seeds are the most basic and important means of production and agricultural chip, in agricultural production, and play an important role in agricultural production. We analyzed the traits of the top 20 varieties of Maize in the Huang-huai-hai summer planting area in 2020, the results showed that in the varieties breeding and planting, the yield should be increased by more 5.0% than control group, resisting ear rot, the thousand-grain weight should be above 330g, bulk density above 720g/L, ear height coefficient equal or close to 0.382, high starch (coarse starch content above 72%), lysine content above 0.3%, medium and large ears (earth length above 17.8cm), and ear row about 16. The development trend of maize production is the whole mechanization operation,in order to ptovide a standard for selecting varieties with low grain moisture content during during harvest time, the data of water content of new maize varieties should be added in the experiment.