本文总结和概述了本所在玉米优良基础材料的鉴定、筛选、改良和选系利用方面的效果。着重从种质鉴定筛选、分类组群、种质导入的方式方法、遗传改良的进展进行了分析，对选系利用进行了总结。群体改良工作为育种提供了比较丰富的遗传基础。利用改良群体育成一批优良自交系和新品种，取得了显著成果。

This report discussed about evaluation,selecon,improvement and utilization of good Maizc germplasm.Focusing on maizc germplasm screen and selection,classfication and grouping,maize germplasm improvement progress and reluts of selection inbred-lines from the improved populations were analyzed.Maize population improvement riched good maizc germplasm.Some high combining-ability inbred-lines and new good hybrids have been bred.It is a big achievment for maize breeding and production.