Analysis on the Combining Ability of Maize Inbred Lines for Ear Characters

In this study,70 crosses were made by NCⅡ design with 7 inbred lines(consisting of 10 P1 which were selected by Jilin Agricultural Science and Technology College and 7 P2 which were elite inbred lines).The results showed: GCAT and SCA Variance of plant height,ear height,stem diameter,tassel main axis length,tassel branch number,ear length,ear diameter,ear row,number of kernels per row,100-grain weight,grain weight per ear and grain yield were all significant.N575,N194,N324,N503,N324 among the ten inbred lines for experiment were better inbred lines.And N575×DAN340,N503×JI853,N324×DAN340 were the better combinations of high yield and agronomy characters.Correlation analysis indicated that the grain weight of per ear was significantly positive correlated with ear length,ear row,ear thickness and 100-grain weight and little negative correlated with number of kernels per row,bald top length of ear.