论文部分内容阅读
对水分胁迫下12个玉米品种产量、水分利用效率和抗旱相关生理生化指标的分析表明,各品种产量与水分利用效率差异均达到显著水平(p<0.05),其中宁玉309、辽单565、郑单958、大民338四个品种的产量与水分利用效率达到较高水平;叶片相对含水量、脯氨酸含量、丙二醛含量、可溶性糖含量、叶绿素含量等抗旱相关生理生化指标值的差异在水分胁迫下达到显著水平(p<0.05)。通过12个玉米品种生理生化指标值进行的聚类分析表明,辽单565、郑单518、北育288及大民338聚为一类,它们可溶性糖含量、脯氨酸含量、叶绿素含量、相对含水量较高,丙二醛含量较低,抗旱性强;郑单958、益丰29、铁研124及秀青74-5聚为一类,它们可溶性糖含量、脯氨酸含量、叶绿素含量、相对含水量较低,丙二醛含量较高,抗旱性弱;宁玉309、大丰26、冀玉10及抚玉8号的各抗旱相关生理生化指标含量居中,抗旱性中等。结果表明:辽单565和大民338两个品种在具有较高抗旱性基础上,产量与水分利用效率也达到较高水平,达到了节水、抗旱、增产的目标,适合推广应用。
The analysis of yield, water use efficiency and drought-related physiological and biochemical indexes of 12 maize varieties under water stress showed that the differences of yield and water use efficiency of all cultivars reached significant level (p <0.05), among which, Ningyu 309, Liaodong 565, The yield and water use efficiency of four varieties of Zhengdan 958 and Da-min 338 reached a relatively high level. The relative physiological and biochemical indexes such as leaf relative water content, proline content, malondialdehyde content, soluble sugar content and chlorophyll content The differences reached significant levels under water stress (p <0.05). The cluster analysis of physiological and biochemical indexes of 12 maize varieties indicated that Liaodong 565, Zhengdan 518, Beiyu 288 and Damin 338 were clustered together, and their soluble sugar content, proline content and chlorophyll content were relatively Higher water content, lower content of malondialdehyde and stronger drought resistance; Zhengdan 958, Yifeng 29, Tieyan 124 and Xiuqing 74-5 were clustered into one group, and their soluble sugar content, proline content, chlorophyll content , Lower relative water content, higher malondialdehyde content and weaker drought resistance. The contents of physiological and biochemical indexes related to drought resistance of Ningyu 309, Dafeng 26, Ji-yu 10 and Fuyu 8 were middle and the drought resistance was moderate. The results showed that on the basis of higher drought resistance, the yield and water use efficiency of Liaodong 565 and DaMen 338 reached a higher level, reaching the goal of water saving, drought resistance and yield increase, which was suitable for popularization and application.