Combining Ability Analysis of Main Agronomic Characters and Application Evaluation of the Six Exotic Maize Germplasm Resources

Thirty combinations were derived from six inbred lines(C-1,C-2,C-3,C-4,C-5 and C-6) which selecting from exotic germplasm resources as basic materials and with five inbred lines representing five local groups as testers,according to NC-Ⅱ mating design,and the combining ability of main agronomic characters were studied.The results showed that: the inbred lines C-1,C-2 and C-6 had better comprehensive agronomic characters and higher utilization value in breeding,and in aspect of yield traits,the inbred lines C-1with 丹340 and Zheng58,C-2 with 丹988,C-6 with Chang 7-2,Mo17 and 丹988 had strong heterosis in yield,respectively.Because of the farther blood relationship,they and inbred lines of the groups easily formed high-yielding combinations.