玉米育种多年来始终延续着固定的育种程序进行。为适应新时期玉米育种需要，选育新品种，对育种程序需要有所改进。改良系谱法的应用，明显提高了选育几率，减少系谱的麻烦，节约了工作时间和用地。

Breeding procedure had been used in maize breeding for many years, we improved on breeding procedure for selection breeding new well maize variety rapidly, with improved pedigree method used to adapt new aim of maize breeding, that improved breeding probability distinctly, reduced troubles of pedigree method, retrenched labor time and infield.