Analysis on traits combining ability of 12 maize inbred lines

According to the design of 4×8incomplete dialed crossing,32 crossing combinations were conducted to analyze general and special combining ability and their corresponding genetic parameters of 8ear characters in 12 maize inbred lines.The results showed that ear length,the number of row,ear diameter,number of kernels per row,hundred grain weight and kernel rate were mainly controlled by additive genetic effect.Length of bald and ear weight were affected by both additive effect and non-additive effect.Four maize inbred lines(9046,Mo17,chang7-2and F83)had higher relative effect values in general combining ability,and three cross combinations(Huang201×478,Mo17×9046and F83×9046)showed higher relative effect values in special combining ability.The new inbred lines of F83 had higher utilization potential,and its off-springs had moderate ear,shorter bald and bigger kernel weight which indicate a high yield potential.The inbred line ZX09-1002 had potential in improving ear length,kernels per row,hundred grain weight and ear weight.