利用相关及通径分析的方法，对河北省早熟夏玉米品种区试资料进行分析。认为选育早熟、丰产、适应性广泛的玉米杂交种应重点对千粒重和穗行数进行正向直接选择；对穗位、秃尖进行负向直接选择；同时要协调好各性状间的遗传相关关系。对其它性状如出籽率、穗长、株高宜进行间接选择，选择不宜过严。 Using correlation and path analysis methods, the precocious summer maize varieties in Hebei Province were analyzed. The maize hybrids with early maturity, high yield and adaptability should be given positive direct selection for 1000-grain weight and ear rows. The ear position and bald tip should be negatively and directly selected. At the same time, the genetic correlation among the traits should be coordinated relationship. For other traits such as seed yield, spike length, plant height should be an indirect choice, the choice should not be too strict.