中国蔬菜Issue(11)：52-60,9.DOI:10.19928/j.cnki.1000-6346.2025.4040
西瓜苗期耐盐性评价体系的建立及耐盐种质筛选
Establishment of Salt-tolerant Evaluation System at Seedling Stage and Selection of Salt-tolerant Germplasm in Watermelon
摘要
Abstract
Watermelon(Citrullus lanatus L.)is a widely cultivated popular horticultural crop for its juicy and nutritious fruits.However,the scarcity of salt-tolerant germplasm has limited the breeding of new salt-tolerant varieties.In this study,18 watermelon germplasm materials were systematically evaluated for salt tolerance differences under 150 mmol·L-1 NaCl-induced salt stress,and an efficient salt tolerance evaluation system was established.Results demonstrated that salt stress significantly inhibited seedling growth with notable variation in salt tolerance among materials.Salt tolerance coefficient analysis revealed that:① all materials except'B105'and'JX-3'showed plant height coefficients below 1.0;② The root length coefficients of'B105','CJ-1'and'W17'is 1.80,1.67 and 1.82,respectively,indicating their strong salt tolerance;③'W17'displayed superior shoot fresh weight(0.66)and dry weight(1.00)coefficients,while'M20'showed significantly lower values(0.54 and 0.90).Through principal component analysis,membership function evaluation and cluster analysis,the materials were classified into three categories:salt-tolerant('B105''W17''CJ-1''14-1'and'C48'),moderately salt-tolerant,and salt-sensitive('A19''C5''A11''M20').A predictive equation for salt tolerance evaluation was established via stepwise regression:Y=0.175X3+0.675X4-0.138(R²=0.908,X3 and X4 represent root length and shoot fresh weight,respectively),which indicated that the root length and shoot fresh weight were important indicators for salt tolerance identification in watermelon seedlings.In this study,an efficient salt tolerance identification system for watermelon was established,which provides a theoretical foundation for salt-tolerant germplasm identification and breeding,demonstrating significant application potential.关键词
西瓜/盐胁迫/隶属函数分析/耐盐评价/种质筛选Key words
watermelon/salt stress/affiliation function analysis/salt tolerance evaluation/germplasm screening引用本文复制引用
于颖珊,尹萌萌,黄战,金炳奎,刘金宝,刘俊杰,史庆华,张锐敏..西瓜苗期耐盐性评价体系的建立及耐盐种质筛选[J].中国蔬菜,2025,(11):52-60,9.基金项目
山东省重点研发计划项目(2022TZXD0025,2024TZXD055),山东省科技型中小企业创新能力提升工程项目(2022TSGC2338,2022TS1017),山东省蔬菜产业技术体系项目(SDARS-05) （2022TZXD0025,2024TZXD055）
