Combining Ability Analysis of Quantitative Traits in Common Maize Inbred Lines

The general combining ability and specific combining ability of eight traits were analyzed in a design of incomplete diallel cross (P 1×P 2) of 16 inbred lines. The 8 traits include plant height, ear height, ear length, ear diameter, row number of ear, grain mumber per row, 100 kernel weight, weight of single ear. The result showed that the characters of plant height, ear height, row number of ear, weight of single ear are controlled by additive gene and the characters of ear length, grain per row, 100 kernel weight are controlled mainly by non additive gene. The characters of plant height, ear height, row number of ear, 100 kernel weight and weight of single ear should be selected in early generation. The characters of ear length and grain number per row should be selected in late generation.