Comprehensive Evaluation of Chrysanthemum morifolium Varieties Based on Principal Component Analysis and Grey Correlation Degree
In order to explore a simple and feasible comprehensive evaluation method of Chrysanthemum morifolium,and select suitable C.morifolium varieties for cultivation in Zhengzhou,C.morifolium varieties were used as test materials,the comprehensive evaluation of 9 agronomic traits was carried out using grey correlation degree,correlation analysis and principal component analysis.The results showed that 9 agronomic traits of C.morifolium varieties were different,and the coefficient of variation was 6.07%-34.42%.According to the analysis of the gray correlation,the correlation between each agronomic trait and C.morifolium yield was as follows:branch number>flower number>crown width>plant height>fresh weight of single flower>leaf length>flower diameter>leaf width.The results indicated that the number of branches,the number of flowers and the width of crown should be paid attention to in the breeding and introduction of C.morifolium.The results of principal component analysis showed that the first highest score of C.morifolium'Wuyuanhuangju'was consistent with the first highest yield of fresh C.morifolium,and the top four highest scores of principal component analysis were consistent with the top four highest yield of fresh C.morifolium.Therefore,the comprehensive evaluation method based on principal component analysis and grey correlation degree can be effectively evaluated,the selected varieties of C.morifolium'Wuyuanhuangju',C.morifolium'Jinsihuangju',C.morifolium'Huaihuang'and C.morifolium'Huaibai'can be popularized and applied in Zhengzhou and its surrounding areas.
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