Multiple Regression Analysis of Drought Tolerance Coefficients in Maize

indices of growth and development, physiology and biochemistry about drought tolerance were investigated with 12 popularized or newly bred maize inbred lines under the drought condition that water content of soil was regulated to a little more than wilting coefficient with a plastic rain shelter to prevent rainfall. Drought tolerance coefficients were calculated based on the difference of the indices with the normally irrigated contrast and multiple regression analysis was made with per plant kernel yield. The results indicated that the product of drought tolerance coefficients of emergence rate and biomass could be used as the index of drought tolerance identification of inbred lines during seedling stage and that the drought tolerance identification during grown up period should depend on plant height, anthering and silking interval, leaf emergence rate and root weight.