核农学报2025，Vol.39Issue(8)：1786-1796,11.DOI:10.11869/j.issn.1000-8551.2025.08.1786
孕穗期渍水对小麦光合特性和产量的影响及耐渍指标筛选与评价
Effects of Waterlogging at Booting Stage on Photosynthetic Characteristics and Yield of Wheat and Screening and Evaluation of Indicators of Waterlogging Tolerance
摘要
Abstract
In order to clarify the effect of waterlogging at booting stage on the photosynthetic characteristics and grain yield of wheat,and to screen and evaluate the relevant waterlogging tolerance indexes,20 wheat varieties were used as materials,and non waterlogging treatment(normal irrigation)was used as a control.Waterlogging treatment was carried out continuously for 7 days during the booting stage of wheat to study the photosynthetic physiological basis of the decrease in wheat yield caused by waterlogging during the booting stage,and to screen for waterlogging tolerance indicators.Principal component analysis was conducted on 10 indicators including SPAD value,flag leaf photosynthesis related parameters,and yield,resulting in 3 principal component factors.The comprehensive evaluation value(W value)of wheat tolerance to waterlogging stress was obtained by standardizing the membership function.Cluster analysis was conducted on the tested varieties based on the W value.The results showed that the waterlogging characteristics of 20 cultivars were divided into 5 grades:I(waterlogging tolerance type),Ⅱ(relative waterlogging tolerance type),Ⅲ(waterlogging intermediate type),Ⅳ(relative waterlogging sensitive type)and V(waterlogging sensitive type).According to the comprehensive performance of the varieties,five wheat cultivars(Emai 596,Huaimai 44,Sulong 128,Yangmai 33 and Yangmai 15)were selected.Compared with the control(normal irrigation),the grain yield of wheat was significantly reduced by 5.71％-38.56％,and the 1 000-grain weight and grain number per spike decreased by 5.66％-21.41％and 7.40％-14.98％,respectively.The main reason for the yield decrease was the decrease of grain number per spike and 1 000-grain weight.Compared with other varieties,the yield of the waterlogging tolerance cultivars was the least reduced,and the impact of waterlogging was less severe.The net photosynthetic rate,stomatal conductance and transpiration rate of flag leaf were reduced by 10.67％-42.32％,29.31％-62.99％and 10.55％-53.91％,respectively.For each of the five types of wheat varieties,the average values of various indicators were calculated to compare the differences among the varieties.Five indicators,namely yield,net photosynthetic rate,intercellular carbon dioxide concentration,transpiration rate and stomatal conductance,were selected as the evaluation indexes of waterlogging tolerance at booting stage.The results of this study provide a references for the screening and stable yield cultivation of waterlogging tolerance cultivars in the middle and lower reaches of the Yangtze River.关键词
小麦/渍水/光合特性/聚类分析/耐渍评价Key words
wheat/waterlogging/photosynthetic characteristics/cluster analysis/evaluation of waterlogging resistance引用本文复制引用
任赵平,宋佳乐,陈龙,罗门,黄正来,张文静,樊永惠,马尚宇..孕穗期渍水对小麦光合特性和产量的影响及耐渍指标筛选与评价[J].核农学报,2025,39(8):1786-1796,11.基金项目
安徽省高等学校科学研究项目(2022AH050906),"十四五"国家重点研发计划项目(2023YFD230020203) （2022AH050906）
