紫斑牡丹花色表型数量分类研究

The Quantitative Classification of Flower Color Phenotype in Paeonia rockii(Flare Tree Peony)

以190个紫斑牡丹品种为材料,利用色差仪连续两年在盛花期测量花色参数,将所测的CIELab表色空间的L^(*)、a^(*)、b^(*)值转化成蒙塞尔颜色系统的H(Hue)、V(Value)、C(Chroma)值,然后根据L^(*)、a^(*)、b^(*)值系统聚类分析,结合H、K、C值,比对ISCC-NBS色名表示法对每种花色进行定性描述。结果表明:通过三L^(*)、a^(*)、b^(*)值聚类分析对紫斑牡丹花色分类,可分为白色、粉色、红色、紫红色和黑红色等5个色系,以及1个可以直观判断的复色系,共6个色系,比按ISCC-NBS色名法分类的7个色系更能准确反映真实情况。本研究首次建立了紫斑牡丹品种花色分类体系,获得了5个色系的数量分类范围和每个品种的花色表型测量值,实现了对不同色系品种花色的定量描述,为紫斑牡丹的花色分类、鉴定以及花色育种积累了重要试验数据。

In 190 Paeonia rockii(flare tree peony)cultivars,the colorimeter was used to measure the flower color parameters in the full bloom period for two consecutive years,and the measured L^(*),a^(*),and b^(*)values were converted into H(Hue),V(Value)and C(Chroma)values of the Munsell Color System. Then,according to the systematic clustering analysis of L^(*),a^(*),and b^(*)values combined with the ISCC-NBS Method,each petal sample’s color was described qualitatively. The result showed:the color classification by cluster analysis on the L^(*),a^(*),and b^(*)values can more accurately reflected the true color of flare tree peony than that by the ISCC-NBS Method,so that the flower colors can be classified into six color systems,including five colors like white,pink,red,purplish red and black red,and one blended color that can be identified directly by eyes. In such the newly-established color classification system of flare tree peony,the quantitative classification range of five color systems and the measurement value on the flower of each cultivar were obtained to realize the quantitative description of distinct color systems. These results supply important experimental data for the classification, identification and breeding of flare tree peony.