主成分权重法在番茄果实商品性综合评价上的应用探讨

本试验以主成分权重法对7个番茄品系的果实商品性状进行了综合评价分析,构建了综合评价函数。结果表明:应用主成分法提取了2个主成分,累计方差贡献率达86.59%,变量的权重偏重于营养品质和外观品质,合乎评价的要求。将7个品系的商品性分为3个层次,品系间在营养品质和耐贮品质的得分上分化较大,外观品质上分化较小,利于品系评选。第1层次是02-6和YH02-9,第2层次是02-1和YH02-7,第3层次02-11、02-8和02-5。此方法把AHP法和主成分法结合起来,考虑了变量测度的转换,使评价客观、分数直观、层次分明,对番茄果实商品性的综合评价有较好的适用性。

Discussion on Comprehensive Evaluation of Commercial Traits of Tomato Fruits Using the Method of Weighting of Principal Component

Commercial traits of 7 tomato cultivars were comprehensively evaluated using the method of weighting of principal component in the experiment.The comprehensive evaluation function was built up.The results showed that with the factor analyzed,2 principal components were abstracted and their cumulative rate of variance was 86.59%.The weights of the nourishment quality and the external appearance quality were higher,which was met up to the demand of the comprehensive evaluation.According to the scores of commercial traits,the cultivars varied considerably in the nourishment quality traits and the preservative quality traits,and less in the external appearance quality traits.This was helpful to pick out good one.The cultivars were divided into three classes,of which 'YH02-6' and 'YH02-9' were in the first class,'YH02-1' and 'YH02-7' were in the second class,and 'YH02-11','YH02-8' and'YH02-5' were in the lowest class.This approved that this analysis method was a practical and efficient way to analyze the commercial traits of the fruits of tomato comprehensively.It integrated the methods of AHP and the principal component analysis to make the evaluating job easy,objective,and obvious.