Comprehensive Evaluation of Stem Lodging Resistance of 145 Maize Inbred Lines
The plant height(PH),ear height(EH),stem rind penetrometer resistance(RPR).internode diameter(ID)and internode length(IL)were investigated under multiple environments with 145 maize inbred lines from home and abroad as materials.The excellent inbred lines with strong stem lodging resistance were screened out through correlation analysis,principal component analysis and cluster analysis,so as to provide excellent germplasm resources for maize lodging resistance breeding.The results indicated that PH,EH,RPR,ID and IL were extremely significantly different among different maize inbred lines.The heritability of PH with 0.99 was the highest,followed by EH and RPR all with 0.97.The correlation analysis results showed that RPR was extremely significantly positively correlated with PH.The principal component analysis results showed that the first three principal components represented 77.02％of the information of the five traits of 145 maize inbred lines,and their contribution rates were 37.08％,21.94％and 18.00％,respectively.Based on the comprehensive evaluation and cluster analysis of lodging resistance of each inbred line,145 inbred lines were divided into 6 groups,13 inbred lines with strong lodging resistance,such as S268,S1 12,S135,S270,etc,were screened out.
万方数据
维普
