Comprehensive application of three analysis methods in evaluation of Saccharina japonica traits

Application of mathematical tool for comprehensive evaluation of Saccharina japonica traits is of great significance to Saccharina japonica breeding and variety production performance comparison. By method of TOPSIS evaluation method,comprehensive index method,grey correlation analysis and the evaluation method of combining these three methods,we carried out main economic characters research of the leaf length,leaf width,bandwidth,wave plait thickness,leaf thickness,and fresh weight for Rongfu,ZajiaoNo.1,Ailunwan,Pingbancai,Fujian,Sanhai and Dongfang No.3. The results showed that Rongfu,Ailunwan and Sanhai revealed the best comprehensive characters,while Fujian and Zaohoucheng the worst. Among different evaluation methods,TOPSIS evaluation method and comprehensive index method showed the highest consistency,which were better than grey relation analysis. The result of comprehensive analysis was consistent with the result in regional test,which showed that these three methods could evaluate the economic characters comprehensively and objectively.