Analysis on Combining Ability and Genetic Parameter in Several Optional Maize Inbred Lines

We selected 11 maize inbred lines by incomplete diallel cross and made them into 28 hybrid combinations and analyzed grain yield,heterosis and combining ability of 9 agronomic traits of different crossing model.The results show that: inbred lines of Xin 831,Xin 662,Xin 923 and Xin 915 have higher value in use and they might be the group with strong heterosis combination of maize inbred lines.The results also show that seed yield rate and grain numbers on per row can be early selected when maize is in early generation;However,plant height,ear height,ear length,ear diameter,row numbers of per ear,yield and removal tip are not availbe to be selected in their early growth.