Maize ear related traits are directly related to yield,and the analysis of their genetic basis is of great significance for guiding maize genetic improvement.In this study,the phenotypic characteristics of eight traits were identified in 168 high genera-tion backcross recombinant inbred lines(AB-RILs)in six environments over three years.QTLs for eight traits were mapped with 11,407 SNP markers generated by 10 K liquid chip in maize.A total of 32 QTL related to eight ear traits were identified in this study,including five environmentally consistent QTLs and three pleiotropic QTL.Further,we used the genotypic and phenotypic data of 507 maize inbred lines to analyze the candidate regions of major QTL and identified 19 candidate genes that might be related to ear shape.We finally speculated four genes as candidate genes based on the analysis of evolution and expression of the genes.These results provide the important marker information for the genetic improvement of ear traits in maize breeding and offered guidance for the cloning of genes related to ear traits.
关键词
玉米/AB-RIL群体/果穗/籽粒/QTL定位/候选区间关联分析
Key words
maize/AB-RIL population/ear/kernel/QTL mapping/candidate regional association analysis
维普
万方数据