多头切花菊品种茎、枝特性评价体系构建与品种评价

【目的】茎、枝特性是切花菊的重要商品性状,建立多头切花菊茎、枝特性评价体系,为筛选优良茎、枝特性的品种提供理论指导。【方法】通过对多头切花菊300个品种的9个与茎、枝特性相关的性状进行连续两个年度的观察记录,借助专家调查法、层次分析法以及K-Means聚类分析法建立评价体系,并进行品种评价。【结果】应用层次分析法确定了9个性状的权重值,其中花朵横向聚拢程度和花朵竖向聚拢程度的权重值最大,均为0.219,其次是花枝角度、茎充实程度,权重值分别为0.123、0.121;综合9个评价指标,通过K-Means聚类分析法将300个品种划分为4个等级,62个品种为优秀、114个品种为良好、80个品种为一般、44个品种为较差,分别占比为20.7%、38%、26.7%、14.6%。【结论】运用专家调查法、层次分析法和K-Means聚类分析法构建出的评价体系可以有效的对多头切花菊品种茎、枝特性进行评价分级,筛选出的优良品种可以在生产中推广应用。

Establishment of Appraisal System for the Stem and Branch Characteristics and Varieties Evaluation of Spray Cut Chrysanthemum

【Objective】Since the characteristics of stems and branches were important commercial traits of cut chrysanthemum, the present study was to establish an appraisal system for selecting stem and branch characteristics of spray cut chrysanthemum, which provided theoretical guidance for screening superior varieties. 【Method】Observing and counting 9 factors related to the characteristics of stems and branches of 300 spray cut chrysanthemum varieties in the consecutive two years, an appraisal system was established by means of expert consultation, analytic hierarchy process and K-Means cluster method to carry out variety evaluation.【Result】The weight of the 9 factors was determined by analytic hierarchy process. Flower lateral convergence, flower vertical convergence, flower branch angle, stem filling degree had the most important impact, and weight was 0.219, 0.219, 0.123 and 0.121, respectively. Then combined the score criterion, 300 varieties were classified into 4 grades by K-Means cluster method. There were 62 varieties graded excellent, 114 graded good, 80 graded general and 44 graded poor, the proportion was 20.7%, 38%, 26.7% and 14.6%, respectively.【Conclusion】The system constructed by expert survey method, analytic hierarchy process and K-Means cluster analysis method could effectively evaluate the stem and branch characteristics of spray cut chrysanthemum varieties, and the selected varieties could be promoted in production.