Appraisement for drought resistance index of the different genotype maize varieties at the anthesis stage

The purpose of present research is to select effective indexes for appraising drought resistance and make sure the drought resistance of different genotype maize.We studied systematically the expression based on thirty three morphological and physiological characters such as growth and development,morphology,yield and physiological biochemistry of the different genotype maize varieties under water stress,adopting method of grey correlation degree and principal component analysis appraised the drought resistance of different maize varieties based on indexes including subordinate function values of drought coefficient(DC) and drought index(DI) of yield,analyzed the correlations between evaluation parameters and tested values of traits.The results showed that five indexes Pn,φPSII,chlorophyll content,dry matter and leaf area were screened based on thirty three morphological and physiological traits with quantitative analyzing methods,which can serve as indexes for identifying maize varieties drought resistance at anthesis stage.The comprehensive drought resistance of maize varieties were calculated by the subordinate degree of drought index of screen,it was used to drought resistant sequencing the two sequencing in accordance with the results of drought index of drought index method.An applied scientific method for comprehensive appraisement drought resistance of maize was offered.We should regard the traits under drought stress condition while appraising maize with drought resistance.