Numerical Classification of <i>Phalaenopsis</i> Flower Colour Based on Phenotype
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2023, Vol. 44 ›› Issue (11): 2227-2235.DOI: 10.3969/j.issn.1000-2561.2023.11.011

• Special Topic of Orchid Science • Previous Articles     Next Articles

Numerical Classification of Phalaenopsis Flower Colour Based on Phenotype

WANG Shiyao, ZHANG Guo, YANG Shucai, JIANG Shuanli, WANG Ruihua, WANG Jun*()   

  1. Zhengzhou Institute of Agriculture and Forestry Science, Zhengzhou, Henan 450005, China
  • Received:2023-06-30 Revised:2023-09-15 Online:2023-11-25 Published:2023-12-08
  • Contact: *WANG Jun,E-mail:wangjun.hnzz@163.com

Abstract:

The study aimed to define the floral colour of Phalaenopsis precisely and establish a classification system of Phalaenopsis based on floral colour phenotypes. In this study, the floral colour phenotypes of 146 Phalaenopsis germplasm resources were determined using colourimeter and RHSCC, and the floral colours of each Phalaenopsis were named by cluster analysis and combined with ISCC-NBS system, and the quantitative classification was studied. The results showed that the colour of Phalaenopsis petals and sepals did not differ much, and the lip petals were darker and more colourful than petals and sepals. The classification results based on cluster analysis of L*, a* and b* of petals could not fully characterize the classification of Phalaenopsis flower colours. The ISCC-NBS system divided Phalaenopsis flower colour into yellow, brown, red, violet, pink, purple and white groups. Each group had a preferable correspondence with L*, a* and b* parameters of the CIE Lab system, which could realize the quantitative description of different Phalaenopsis flower colour and the colour group classification was reasonable. Phalaenopsis were rich and colourful, and there were significant differences between different colour groups of Phalaenopsis, but lacking blue-green colour. Overall the brightness and colouration of Phalaenopsis were negatively correlated, and could be divided into two groups, the first type containing yellow, brown, violet, pink, purple and white groups, the second type containing red colour groups.

Key words: Phalaenopsis, flower colour phenotype, numerical classification, cluster analysis, ISCC-NBS method

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