Analysis of Combining Ability for Main Quantitative Characters of Improved Maize Inbred Lines from American Maize Germplasm

Using 8×4 incomplete diallel cross design,the combining ability and corresponding genetic parameters of 9 characters of 8 maize inbred lines were analyzed.The results showed that the inbred line 20125,41151 and 41161 have higher common combining ability and could be used directly.The analysis of genetic parameters indicated that plant height,ear location height and kernel rows per ear should be considered selection in earlier generation.