Plant height,ear height,ear length,ear diameter,tassel branch number,date to silk and date to pollen shedding are important agronomical traits in maize.In this study,a population of 141 RIL lines was used to map quantitative trait locus (QTL) of seven agronomic traits under three different environments.A total of 18 QTLs associated with the seven traits were detected.Individual locus explained 9.79% to 37.35% of phenotypic variance.Four of them were detected under more than one environment,and 5 QTLs were the same as those reported previously.It will provide basis for improving these agronomic traits in maize.