Identification and Evaluation of Cotton Salt Tolerance during Germination and Seedling Stages
Wang Xiaoge
Gao Liying
Deng Yongsheng
Shen Guifang
Kong Fanjin
Duan Bing
Wang Zongwen
Xu Dongdong
Liu Fei
Han Zongfu
Abstract：The huge and increasing area of saline-alkali land in China highlights the importance of fully developing and utilizing the resources to ensure arable land availability and maintain national agricultural secu-rity.Cotton is a pioneer crop in saline-alkali land,but there is significant variation in salt tolerance among dif-ferent cotton materials.Therefore,it is crucial to identify and select salt-tolerant cotton materials for planting in saline-alkali land.In this study,58 cotton materials were subjected to salt stress with NaCl solution at 300 mmol/L,and then the germination rate,germination vigor,germination index,plant height,aboveground dry weight and underground dry weight were measured,and their relative values were calculated and analyzed by principal component analysis(PCA)and cluster analysis.The results demonstrated that the 58 materials were divided into five categories including high-salt-resistant category(5 materials),salt-resistant category(11 ma-terials),salt-tolerant category(22 materials),non-salt-tolerant category(16 materials),and salt-sensitive category(4 materials).Furthermore,an optimal regression equation of trait indicators and comprehensive salt tolerance scores,D=-0.775+0.569XGR+0.720XGE+0.404XSW+0.410XRW,was established using stepwise re-gression analysis,so an evaluation method for cotton salt tolerance during germination and seedling stage,which could provide a theoretical foundation for identifying salt-tolerant cotton germplasms.
Keywords：CottonSalt tolerance identificationGermination and seedling stagePrincipal component analysisCluster analysisComprehensive evaluation
Publication Date：2025-02-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 29-37 )