This experiment used 48 wheat varieties with different drought resistance as materials .Nine-teen indexes were investigated in non -watered and well -watered field plots with the same soil conditions , such as flag leaf area , spike length , peduncle length , distance of spike and leaves , relative water content of flag leaf, water loss rate of cutting flag leaf , plant height, number of spikes per unit area , photosynthetic rate, transpiration rate , stomata conductance , intercellular CO 2 concentration , and water use efficiency . The drought resistance coefficient ( DRC) of each index was calculated and employed as the measurement index of drought resistance .The results showed that the 19 indexes could be integrated into 8 independent comprehen-sive components through the principal component analysis .The value of comprehensive indexes were calculat-ed, and the drought resistance of the varieties in local area was comprehensively evaluated by membership function method .Under the non-watered condition in Yantai , Luohan 13 showed higher drought resistance , and Yunhan 22-33 , Luohan 11 , Luohan 9 , Yannong 0428 , Shi 4185 , Yunhan 618 , Yanzhong 13 , Yan 1213 , Cangmai 6005 , Luohan 8 , Heng 4399 , Chang 6359 , Hengguan 136 , Hengyou 18 , Luohan 7 and Yan-nong 21 showed moderate drought resistance.These results provided references for selecting germplasms to cul -tivate drought -resistant wheat varieties in field.%本试验以48份不同抗旱性的小麦品种（系）为试材，分别调查其在雨养旱地和灌溉水地的旗叶面积、穗长、穗下节长、穗叶距、旗叶相对含水量、旗叶离体失水速率、株高、单位面积穗数、光合速率、蒸腾速率、气孔导度、胞间二氧化碳浓度、水分利用效率等19项指标，计算出各指标的抗旱系数，并将其作为衡量抗旱性的指标，利用主成分分析法，将19个单项指标综合成8个相互独立的综合指标，计算出各品种的综合指标值，再利用隶属函数法，综合评价这48个品种（系）在本地区表现出的抗旱性。比较结果显示，在烟台地区自然降雨（不灌溉）条件下表现高度抗旱的品种有洛旱13号，中度抗旱品种有运旱22-33、洛旱11号、洛旱9号、烟农0428、石4185、运旱618、烟中13、烟1213、沧麦6005、洛旱8号、衡4399、长6359、衡观136、衡优18、洛旱7号、烟农21等。这为抗旱节水品种的田间培育提供了种质资源选择的参考性。
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