中原牡丹品种基于花色测定的聚类分析

Cluster Analysis on Determination Flower Colors of Central Plains Tree Peony

利用色差仪按国际照明委员会(CIE)表色系统对94个中原牡丹品种的花色进行测定,通过聚类过程将花色三刺激值(明度L*、色相a*和b*)采用Ward离差平方和法进行了聚类分析。结果表明:94个中原牡丹品种花色在CIE表色系统坐标系上的分布广泛,聚类分析将其分为9个色系:白、绿、浅粉、粉红、粉兰、红、紫、红紫、红黑,不同色系牡丹的L*、a*和b*值特征明显。白色、浅粉、粉色和红色系以及粉兰、紫色和红紫色系的L*与a*、L*与彩度(C*)均表现出显著的负相关性。多数色系牡丹的L*与b*呈显著的正相关关系(R^2为0.8653)。

Using colorimeter on flower color was determination of 94 cultivars of central plains tree peony, according to the CIE color system,by means of cluster on CIELab using Ward＇s minimum-variance cluster analysis. The results showed that 94 cultivars of central plains tree peony the CIE Lab color coordinate,all cultivars were divided in to nine groups, white,green,pale pink, pink, pink blue, red, purple, reddish-purple and reddish-dark, CIE Lab characteristic distinct. showed negative correlations between Lightness（L^＊ ）and chromatic component a^＊ or between L^＊ and Chroma （C^＊ ） of White,pale pink and red or pink blue, purple and reddish-purple. The significant positive correlation between L^＊ and chromatic component b^＊ was showed in most groups.