Comprehensive Evaluation on Salt Tolerance of Brassica napus Varieties at Germination Stage
In order to explore a comprehensive evaluation method for salt tolerance of Brassica napus seeds during germination,this study stressed 30 Brassica napus seeds at germination stage with 250 mmol/L NaCl solution and determined 8 salt tolerance indexes.Correlation analysis,principal compo-nent analysis and cluster analysis were used for comprehensive evaluation.The results showed that the germination and growth of different varieties of Brassica napus were inhibited by salt stress at germination stage.Principal component analysis converted 8 salt tolerance indexes into 2 comprehen-sive indexes,and the cumulative contribution rate was 88.12％.The 30 Brassica napus varieties were divided into five categories by cluster analysis,among which 1 was high salt-tolerant,6 salt-tolerant,9 medium salt-tolerant,10 salt-sensitive and 4 salt-sensitive.The prediction model of salt tolerance of Brassica napus during germination was established.
万方数据
维普
