中国稻米2026，Vol.32Issue(5)：35-41,7.DOI:10.3969/j.issn.1006-8082.2026.05.007
极端高温对水稻农艺性状及品种试验稳定性的影响
Effects of Extreme High Temperature on Rice Agronomic Traits and Variety Trial Stability
摘要
Abstract
Rice is one of the most important food crops in the world,and its growth,development,and yield formation are highly sensitive to temperature conditions.This study systematically analyzed the interannual variation characteristics of major agronomic traits and the effects of extreme high temperature based on data from a 2022-2023 centralized demonstration trial of 97 new rice varieties conducted in Shengzhou City,Zhejiang Province.The results showed that,in high-temperature years,the sowing-to-heading period and the heading duration were significantly extended,the seed-setting rate and thousand-grain weight decreased markedly,and the number of effective panicles slightly increased,leading to a significant overall reduction in yield.In contrast,plant height and grains per panicle did not change significantly between years.Correlation analysis revealed that high temperature weakened the synergistic relationships among growth-period traits,strengthened the resource allocation trade-off between panicle number and grains per panicle,and reduced the predictive accuracy of theoretical yield for actual yield.Principal component analysis further demonstrated that high temperature increased the sensitivity of yield component factors to environmental variation,while reducing the coordination among growth-period traits.In summary,extreme high temperature significantly amplifies the interannual fluctuations in major agronomic trait expression of new rice varieties,thereby,affecting the stability and accuracy of variety trial evaluations.Therefore,it is recommended that in the evaluation process of new rice varieties,the impact of key environmental factors such as extreme high temperatures be comprehensively considered,and the variety evaluation system be optimized to enhance the reliability and targeting of new variety breeding and promotion applications.关键词
水稻/高温/农艺性状/年际变异/新品种试验Key words
rice/high temperature/agronomic traits/interannual variation/new variety trial分类
农业科技引用本文复制引用
李延玲,缪添惠,孙挺,曹静,张文宇,杨曙东..极端高温对水稻农艺性状及品种试验稳定性的影响[J].中国稻米,2026,32(5):35-41,7.基金项目
国家重点研发计划项目(2022YFD2001000) （2022YFD2001000）
江苏省基础研究计划青年基金项目(BK20250298) （BK20250298）
