中国农学通报2025，Vol.41Issue(23)：1-9,9.
多年生稻苗期耐盐性评价
Evaluation of Salt Tolerance of Perennial Rice at Seedling Stage
摘要
Abstract
This study aims to assess the salt tolerance of perennial rice varieties(lines)'PR23','PR24','PR25','PR26','PR101','PR107',and'PR109',and to screen out elite salt-tolerant germplasm.The experiment employed NaCl solutions at concentrations of 0,50,100,150,and 200 mmol/L to conduct salinity stress treatments on perennial rice varieties(lines)and the parent'RD23'.The vitality parameters(seedling height,root length,fresh weight,dry weight,etc.)and salt tolerance coefficients of varieties were determined under different NaCl concentrations.Principal component analysis(PCA)and the membership function method were used to comprehensively evaluate the salt tolerance performance of the varieties(lines).The results showed that:(1)significant differences in salt damage levels among varieties(lines)were observed when NaCl concentration reached 150 mmol/L.Among all the phenotypic traits associated with salt stress,except for root length,all other traits under the 150 mmol/L NaCl treatment showed significant differences from the control group(P<0.05),establishing this concentration as the optimal level for screening salt tolerance in perennial rice during the seedling stage.(2)PCA of the relative values of salt tolerance traits under the 150 mmol/L NaCl treatment generated membership function values.Combining with the principal component variance contribution rate weight,the comprehensive evaluation D value was obtained,showing that'Yun Da 107(PR107)'exhibited the strongest comprehensive salt tolerance ability at the seedling stage,while'PR101'showed the weakest salt tolerance capacity.Other varieties(lines)had intermediate salt tolerance levels.This study provides high-quality germplasm resources for rice salt tolerance breeding and lays the foundation for future improvements in rice salt tolerance.This study not only identifies elite salt-tolerant rice germplasm resources through phenotypic and genotypic assessments,laying a foundation for genetic improvement of rice salt tolerance,but also provides critical data support for further research on salinity stress tolerance mechanisms.关键词
耐盐性/多年生稻/苗期/NaCl胁迫/主成分分析/隶属函数法Key words
salt tolerance/perennial rice/seedling stage/NaCl stress/principal component analysis(PCA)/membership function method分类
农业科技引用本文复制引用
刘永秀,张石来,赵颖,徐玲,袁圆,昂磊,罗静,杨涛,张清华,徐叶菊..多年生稻苗期耐盐性评价[J].中国农学通报,2025,41(23):1-9,9.基金项目
云南省科技人才与平台计划"云南省刘巧泉专家工作站"(202405AF140110) （202405AF140110）
中青年学术和技术带头人后备人才项目(202305AC160015) （202305AC160015）
云南省基础研究计划项目"多年生稻种质创新与生物育种"(202501AV070007). （202501AV070007）
