Applied Potency of 14 New Maize Inbred Lines

The 14 maize inbred lines selected in recent years had been tested with the methods and principles of NCII crossing design to study the combining ability of 10 characters and heterotic group dividing of inbred lines.The result indicated that the variance of the common combining ability of the tested lines on all characters was very significant.The lines of HX210 and HX303 doing pro progenies of the group with greater yield potential could be directly used in maize breeding other than the lines of HX458 and HX3 with less comprehensive characters to be modified before use.HX303×K10 and other 5 combinations had high heterosis with high yield potential.According to the total combining ability of yield per plant,these 14 lines were divided into four heterotic groups.