关键词: 小麦品种, 灌浆期, 渍水胁迫, 耐渍系数, 隶属函数, 沿淮地区

Abstract: The grain yield and quality traits of different wheat varieties were analyzed to provide a theoretical reference for screening waterlogging tolerance varieties suitable for planting in the area along the Huaihe River. In the field experiment，34 wheat varieties were selected as materials，which were treated with normal precipitation during the whole growth period and waterlogging stress during the filling period. Seven main yield and quality indexes including spike number，grain number per spike，grain weight，grain yield，wet gluten， protein content，and starch content were determined. The subordinative function method was used to calculate the waterlogging tolerance coefficient of each index，and the comprehensive waterlogging tolerance ability of each wheat variety was evaluated by cluster analysis. Under waterlogging stress，the grain weight and grain yield of wheat decreased greatly，and the trait indexes decreased significantly. Based on the variation coefficient of the waterlogging tolerance coefficient，the inhibitory effect of waterlogging stress on wheat yield and quality traits at the filling stage was grain weight > wet gluten > protein content > grain yield > grain number per spike > starch content > spike number. The average membership value of waterlogging tolerance was extremely significantly positively correlated with grain weight and starch content，extremely significantly positively correlated with waterlogging tolerance coefficient of grain weight， wet gluten， protein content， and starch content， and significantly positively correlated with waterlogging tolerance coefficient of yield. Through cluster analysis，34 wheat varieties were divided into three types：waterlogging tolerance， intermediate, and sensitive. The number of materials was 22，10，and 2，respectively， accounting for the tested materials，64. 71%，29. 41%，and 5. 88%，respectively. Grain weight and grain yield can be used as the preferred indexes for evaluating the waterlogging tolerance of wheat. Yangmai 13，Yangmai 22，and Ningmai 13 can be used as reference resources for wheat waterlogging tolerance cultivation and breeding.

Key words: wheat varieties, filling stage, waterlogging stress, waterlogging tolerance coefficient, membership function, the area along the Huaihe River