Comprehensive analysis for regional trial on maize varieties consortium in Baoshan,Yunnan

ObjectiveThe regional trial on maize varieties consortium in Baoshan,Yunnan in 2016 was comprehen-sively analyzed in order to provide reference for variety breeding,improvement and application.MethodComprehensive analysis on yield,resistance,ear character and agronomic characters of seven tested maize varieties(including one control) in national regional trial(southwest broup of spring sowing)of Beiyu maize varieties consortium in Baoshan in 2016 were conducted by means of variance analysis,principal component analysis and cluster analysis.ResultThe variance analy-sis indicated that,yields of the six tested varieties were significantly higher than that of the control(P<0.05),with Minsh-eng 5961 and Zhouyu 0913 the highest. Principal component analysis implied that the yield and comprehensive evaluation of maize varieties were greatly influenced by four components. The first principal component included factors of ear length,gray leaf spot,ear diameter and plant height,the second principal component included factors of double spike rate and 100-grain weight,the third principal component included rate of grain production,and the fourth principal compo-nent including lodging rate. On the basis of cluster analysis,seven tested maize varieties could be classified into four cate-gories:category I included Minsheng 5961 which had an outstanding comprehensive performance;categoryⅡincluded Jinqiu 7209 and Zhouyu 0913 which comprehensively performed well;category III contained Kangnongyu 508 which had medium comprehensive performance;category IV consisted of two subgroups,subgroup IV-1 included Zhongdan 888 and Jinbaiyu 2 which presented poor comprehensive performance,while subgroup IV-2 contained the control Yudan 8 which performed the worst.ConclusionIt is suggested to expand the demonstration planting of Minsheng 5961,Jinqiu 7209 and Zhouyu 0913 among the seven tested varieties in Baoshan due to their fine comprehensive performance.