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以玉米东单７号、丹玉１３号、豫玉３号及其亲本自交系（Ｄ１，Ｄ２，Ｍｏ１７，Ｅ２８，３１８４，黄早四）为试材，研究了玉米果穗性状、形态和生理生化指标在干旱条件下的变化及其与抗旱性的关系。结果表明，穗重、穗粒重、结实长度、穗直径、穗粒数、行粒数、单株叶面积、相对电导率、脯氨酸含量、叶片失水速率、根部失水速率、叶片光合速率、叶片ＶＣ含量、叶片ＳＯＤ活性、叶片丙二醛含量与抗旱性显著相关。穗行数、瘪粒数、叶向值、叶角度、叶形值、黄叶枯叶数、叶绿素含量与抗旱性没有显著的相关性。用穗部性状进行抗旱性直接鉴定可靠性高，用形态性状指标进行抗旱性间接鉴定可靠性较差，用生理生化指标进行间接鉴定时，需以丙二醛含量，叶片失水速率、相对电导率、叶片ＳＯＤ活性、ＶＣ含量为５项指标综合鉴定可靠性较高
The effects of maize Dongdan 7, Danyu 13 and Yuyu 3 and their inbred lines (D1, D2, Mo17, E28,3184 and Huangzao Si) on the traits, morphological and physiological and biochemical characteristics of maize The Change of Indices under Drought Conditions and Its Relationship with Drought Resistance. The results showed that ear weight, ear kernel weight, grain length, ear diameter, number of spikes per panicle, grain number per row, leaf area per plant, relative conductivity, proline content, leaf water loss rate, root water loss rate, leaf photosynthesis The leaf rate, leaf VC content, leaf SOD activity and leaf MDA content were significantly correlated with drought resistance. No significant correlation was found between the number of panicles, the number of defocused grains, leaf value, leaf angle, leaf shape, yellow leaf number, chlorophyll content and drought resistance. Direct identification of drought resistance with panicle traits is of high reliability. Indirect identification of drought resistance with morphological traits is less reliable. Indirect identification with physiological and biochemical indicators requires that malondialdehyde content, leaf water loss rate, relative conductance Rate, leaf SOD activity, VC content of 5 indicators comprehensive identification of high reliability