中国农业科技导报2025，Vol.27Issue(3)：60-70,11.DOI:10.13304/j.nykjdb.2023.0391
辣椒种质资源苗期耐热性综合评价体系的建立
Establishment of Comprehensive Evaluation System of Pepper Germplasm Resources on Heat Tolerance at Seedling Stage
摘要
Abstract
To establish the comprehensive evaluation system of pepper seedlings on heat tolerance,30 pepper germplasms were randomly divided into 2 groups,which were used for heat resistance predictive model construction(containing 20 materials)and model validation(10 materials),respectively.The high temperature environment was set in artificial climate chamber.The 10 morphological and physiological indexes of pepper seedlings were determined,and the heat tolerance of pepper seedlings were evaluated by principal component,subordinate function,cluster analysis and stepwise regression analysis.The results showed that among the 10 indexes,8 indexes were significantly affected by high temperature,which could be transformed into 3 independent comprehensive indexes and the accumulative contribution rate was 76.474%.The 20 materials were divided into 4 categories:heat-resistance,medium heat-resistance,medium heat-sensitivity and heat-sensitivity by systematic clustering method based on the comprehensive evaluation value(D value).The prediction equation was constructed by stepwise regression analysis,and the heat tolerance of the test materials was predicted by this equation.The predicted values were significantly correlated with the D value,indicating that this equation was reliable for predicting the heat resistance of pepper seedlings,and could be used to evaluate heat-tolerance of pepper at seedling stage.By comparing the heat injury index(HII)identification method and the comprehensive evaluation method to identify the heat resistance of pepper seedlings,it was found that the identification results of the 2 methods were generally similar.The HII method was insufficient to distinguish the heat-tolerance of moderately tolerant materials,but because of its intuition and convenience,it could be used as a reliable index for heat-tolerance identification,and used for preliminary evaluation of heat-tolerance.关键词
辣椒/苗期耐热性/综合评价体系/预测方程/热害指数Key words
pepper/heat tolerance at seedling stage/comprehensive evaluation system/prediction equation/heat injury index分类
园艺学与植物营养学引用本文复制引用
雷刚,方荣,周坤华,陈学军,袁欣捷,黄月琴,李歌歌,谢媛媛,宋小民..辣椒种质资源苗期耐热性综合评价体系的建立[J].中国农业科技导报,2025,27(3):60-70,11.基金项目
江西省农业科学院基础研究与人才培养项目(JXSNKYJCRC202304) （JXSNKYJCRC202304）
江西省农作物良种联合攻关项目 （）
国家特色蔬菜产业技术体系建设项目(CARS-24-G-08) （CARS-24-G-08）
江西省现代农业产业技术体系建设专项(JXARS-06) （JXARS-06）
江西现代农业科研协同创新专项(JXXTCX202202). （JXXTCX202202）
