Analysis of Main Traits Combining Ability and Application Potential of 16 Maize Inbred Lines
In order to scientifically and rationally utilize excellent germplasm resources and guide maize breeding,16 female inbred lines and 5 male standard testers were tested in this study.The combining ability and genetic parameters of main agronomic traits were analyzed through NCⅡ design experiment,and the potential utilization value of newly selected inbred lines was evaluated.The results show that 17Q372 and 17Q253 can increase the yield of hybrid combination,1618 and 17Q619 can reduce the plant height and ear height,17Q372 and 17Q116 can increase the seed yield,and 17Q260-3 and 17Q253 can increase the grain length,these inbred lines can be further used in maize breeding process.1628x'Zheng58',with the largest SCA effect value in ear length,number of rows and kernel ratio,has high yield potential.The genetic parameters of 11 traits in 21 inbred lines were analyzed,six traits such as plant height,ear height,tassel branch number,barren ear tip length,ears rows and kernel ratio should be selected for early generation,while three traits such as ear length,kernels per row and yield per plant should be selected for late generation.Based on the SCA effect values of 80 hybrids,seven inbred lines 1628,M1002,1618,Q508,17Q402,17Q416 and 17Q253 can be preliminarily divided into SS group,and 6 inbred lines 1503,17Q862,F2222,17Q116,17Q372 and 17Q305 can be divided into NSS group.The results will provide important theoretical references for further use of these newly selected lines to carry out germplasm improvement and breeding.
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