蜂窝型切花菊观赏性状综合评价与筛选

对54个大花蜂窝型切花菊株系,以株高、节间长、茎粗、茎充实度、叶长、叶宽、叶柄角度、花径、花高/花径、舌状花数和管状花数共11个观赏性状作为评价因子,利用层次分析法建立综合评价体系,并开展株系的筛选。研究确定了各性状的权重值,其中花高/花径影响最大,权重为0.241,其次是舌状花数和管状花数,权重为0.155和0.111。通过K-Means聚类分析将54个株系分为3个等级,优13个,占24.07%;良30个,占55.56%;差11个,占20.37%。通过层次分析法及K-Means聚类分析可以有效地对蜂窝型切花菊株系观赏性状进行综合评价,并选出符合育种目标的优良后代,为新品种选育提供重要材料。

Comprehensive Evaluation of Ornamental Traits and Selection of Pompon Type Cut Chrysanthemum

In order to establish a comprehensive evaluation system for 54 large-flowered pompon type cut chrysanthemum lines,11 ornamental traits including plant height, internode length,stem diameter,stem filling degree,leaf length,leaf width,angle of leaf petiole,flower diameter,ratio of flower height vs flower diameter,ray florets number and tubular florets number were employed. The result showed that the ratio of flower height vs flower diameter is of the highest weight value,i.e.,0.241,which has the greatest influence on the pompon flower type,followed by number of ray flowers with a weight value of 0.155,and number of tubular flowers with a weight value of 0.111. K-Means cluster analysis showed that the 54 F1 lines could be divided into 3 grades,i.e.,13 superior lines,30 good lines,and 11 poor lines,which accounted for 24.07%,55.56% and 20.37%,respectively,of the evaluated plant lines. The analytic hierarchy process and K-Means cluster analysis are effective in evaluating the ornamental performance of F1 progeny of pompon type cut chrysanthemum,as well as to select excellent offsprings that meet breeding goals. The present study would provide valuable plant materials for the development of new pompon type cut chrysanthemum varieties.