中国农业科学 ›› 2026, Vol. 59 ›› Issue (21): 4710-4728.doi: 10.3864/j.issn.0578-1752.2026.21.002

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

小麦耐高温优异资源鉴定及其与农艺性状的关联分析

尹晓康1(), 冯佳宜1(), 李栩慷1, 张朝旭1, 马驰1, 王若禹1, 白佳乾1, 蓝罗冰1, 张良凤1, 刘易科2, 朱展望2, 丁富功2, 刘大同3, 王书平1(), 方正武1(), 张迎新1()   

  1. 1 长江大学农学院/农业农村部长江中游作物绿色高效生产重点实验室/涝渍灾害与湿地农业湖北省重点实验室, 湖北荆州 434025
    2 湖北省农业科学院粮食作物研究所/粮食作物种质创新与遗传改良省重点实验室, 武汉 430064
    3 江苏里下河地区农业科学研究所/农业农村部长江中下游小麦生物学与遗传育种重点实验室, 江苏扬州 225007
  • 收稿日期:2026-04-12 接受日期:2026-06-26 出版日期:2026-11-01 发布日期:2026-11-06
  • 通信作者:
    王书平,E-mail:。
    方正武,E-mail:。
    张迎新,E-mail:
  • 联系方式: 尹晓康,E-mail:yin_xiaokang2004@126.com。冯佳宜,E-mail:fengjiayi420@163.com。尹晓康和冯佳宜为同等贡献作者。
  • 基金资助:
    国家重点研发计划(2024YFD1201100); 湖北省重点研发计划(2024BBB004); 粮食作物种质创新与遗传改良湖北省重点实验室开放课题(2024lzjj15); 涝渍灾害与湿地农业湖北省重点实验室开放课题(KFG202617)

Identification of Excellent High Temperature Tolerant Resources in Wheat and Their Association Analysis with Agronomic Traits

YIN XiaoKang1(), FENG JiaYi1(), LI XuKang1, ZHANG ZhaoXu1, MA Chi1, WANG RuoYu1, BAI JiaQian1, LAN LuoBing1, ZHANG LiangFeng1, LIU YiKe2, ZHU ZhanWang2, DING FuGong2, LIU DaTong3, WANG ShuPing1(), FANG ZhengWu1(), ZHANG YingXin1()   

  1. 1 College of Agriculture, Yangtze University/Key Laboratory of Green and Efficient Crop Production in the Middle Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs/Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Jingzhou 434025, Hubei
    2 Institute of Food Crops, Hubei Academy of Agricultural Sciences/Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Wuhan 430064
    3 Lixiahe Institute of Agricultural Sciences in Jiangsu Province/Key Laboratory of Wheat Biology and Genetic Improvement for Low & Middle Yangtze Valley, Ministry of Agriculture and Rural Affairs, Yangzhou 225007, Jiangsu
  • Received:2026-04-12 Accepted:2026-06-26 Published:2026-11-01 Online:2026-11-06

摘要:

【目的】针对小麦灌浆期高温胁迫造成的小麦减产问题,明确不同基因型小麦品种灌浆期高温胁迫对植株表型、农艺性状、产量及其构成因素的影响,构建一套适合长江中下游冬麦区的小麦耐高温综合评价体系,筛选耐高温小麦品种,为小麦耐高温育种提供鉴定方法和优异的种质资源。【方法】以30个冬小麦品种为供试材料,在花后第7天分别设置高温处理组(日温38 ℃/夜温20 ℃处理7 d)和对照组(日温25 ℃/夜温20 ℃处理7 d),测定旗叶叶绿素相对含量(旗叶SPAD值)、丙二醛(MDA)、过氧化氢(H2O2)和超氧阴离子自由基(O2-·)含量,以及抗坏血酸过氧化物酶(APX)、过氧化物酶(POD)、超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性,收获后,测定粒长、粒宽、穗粒重、千粒重和单株产量。利用方差分析剔除无显著差异的指标,随后,利用耐高温系数(HTC)对原始数据进行标准化,采用主成分分析和隶属函数法计算综合评价值D,以评价小麦耐高温能力。最后,利用冗余分析(RDA)和逐步回归建立预测模型。【结果】灌浆期,高温胁迫对不同基因型小麦品种均造成了不同程度的叶片枯黄和籽粒皱缩。高温处理下各指标的变幅为-66.82%—210.07%,O2-·含量升幅最大(210.07%),APX活性降幅最大(-66.82%)。不同品种各指标的耐高温系数存在显著差异,变异系数为9.522%—115.003%,APX活性的变异系数最大(115.003%),粒宽的变异系数最小(9.522%)。对满足MSA值>0.5、KMO值≥0.6的7个指标进行主成分分析,生成4个新的相互独立的综合指标,包含82.814%的原始信息。进一步将隶属函数分析获得的综合评价值D进行聚类分析,将30个品种划分为3个类型,即耐高温型(5个)、中等耐高温型(12个)和高温敏感型(13个)。采用冗余分析和逐步回归建立小麦耐高温评价最优回归模型:D=-0.111+0.259X8+0.136X12+0.186X2+0.111X1+0.137X11+0.12X10,各品种的回归值(RV)与D值高度相关(r=0.996),确定了旗叶叶绿素相对含量(X8)、单株产量(X12)、POD活性(X2)、APX活性(X1)、千粒重(X11)和穗粒重(X10)可用于小麦耐高温性的重要评价指标。【结论】灌浆期高温胁迫显著影响了小麦的生长发育。采用主成分分析和聚类分析,筛选出5个耐高温型小麦品种。构建了适合于长江中下游麦区的小麦耐高温综合评价模型,可用于评价不同小麦品种灌浆期的耐高温特性。

关键词: 小麦, 灌浆期, 耐高温, 综合评价, 种质鉴定

Abstract:

【Objective】To address the wheat yield loss caused by high temperature stress during grain filling, this study was conducted to clarify the effects of post-anthesis high temperature stress on plant phenotype, agronomic traits, yield and yield components of different wheat genotypes, establish a comprehensive evaluation system for wheat high temperature tolerance suitable for winter wheat regions in the middle and lower reaches of the Yangtze River, screen out high temperature tolerant wheat varieties, and provide identification methods and high quality germplasm resources for wheat high temperature tolerance breeding. 【Method】30 winter wheat varieties were used as experimental materials. On the 7th day after anthesis, two treatments were set for 7 days respectively, including the high temperature treatment (38 ℃ daytime/20 ℃ nighttime) and the control treatment (25 ℃ daytime/20 ℃ nighttime). After treatment, the relative chlorophyll content (SPAD value) of flag leaves, activities of ascorbate peroxidase (APX), peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT), as well as the contents of malondialdehyde (MDA), hydrogen peroxide (H2O2) and superoxide anion radical (O2-·) were measured. After harvest, grain length, grain width, grain weight per spike, thousand-grain weight and yield per plant were determined. Analysis of variance (ANOVA) was firstly adopted to eliminate indicators with no significant differences. All raw data were standardized by the high temperature tolerance coefficient (HTC). Principal component analysis (PCA) combined with the membership function method were performed to calculate the comprehensive D value for evaluating wheat high temperature tolerance. Redundancy analysis (RDA) and stepwise regression were finally used to construct the prediction model. 【Result】High temperature stress during grain filling stage caused varying degrees of leaf yellowing and grain shrinkage in all tested wheat genotypes. Under high temperature treatment, all index varied in the range of -66.82% to 210.07%, with the content of O2-· showing the greatest increase (210.07%) and APX activity showing the greatest decreased (-66.82%). Significant differences in HTC values were observed among different wheat cultivars, with coefficients of variation (CV) ranging from 9.522% to 115.003%. APX activity had the highest CV (115.003%), and grain width had the lowest CV (9.522%). PCA was performed on 7 indicators that met the criteria of MSA > 0.5 and KMO ≥ 0.6. 4 independent comprehensive new components were extracted, which explained 82.814% of the total variance in the original data. Furthermore, cluster analysis based on the comprehensive evaluation value D classified the 30 cultivars into three categories: 5 high temperature tolerant cultivars, 12 moderately high temperature tolerant cultivars, and 13 high temperature sensitive cultivars. The optimal regression model for wheat high temperature tolerance evaluation was established via redundancy analysis and stepwise regression: D=-0.111+0.259X8+0.136X12+0.186X2+0.111X1+0.137X11+0.12X10. The regression values (RV) of each variety were highly correlated with the D values (r=0.996). Flag leaf relative chlorophyll content (X8), yield per plant (X12), POD activity (X2), APX activity (X1), thousand-grain weight (X11) and grain weight per spike (X10) were identified as core indicators for evaluating wheat high temperature tolerance. 【Conclusion】High temperature stress during grain filling stage significantly constrained the growth and development of wheat. Using PCA and cluster analysis, 5 high temperature tolerant wheat cultivars were screened out. A comprehensive evaluation model for wheat high temperature tolerance applicable to the middle and lower reaches of the Yangtze River winter wheat was established, which can be effectively used to evaluate the high temperature tolerance of different wheat varieties at grain filling stage.

Key words: Triticum aestivum L., grain filling stage, high temperature tolerance, comprehensive evaluation, germplasm identification