Acta Agriculturae Zhejiangensis ›› 2026, Vol. 38 ›› Issue (2): 258-268.DOI: 10.3969/j.issn.1004-1524.20250061

• Horticultural Science • Previous Articles     Next Articles

Genetic diversity analysis of Hippeastrum breed resources based on distinctness, uniformity, and stability testing

ZHONG Hongrui1,2(), CHU Yunxia1,3, DENG Shan1,3, ZHANG Yu1,3, ZHANG Yongchun1, REN Li1,3, ZHAO Hong1,3, ZHANG Yiying1,3, LIU Kun1,3, CAO Jianguo2,*(), CHEN Hairong1,3,*()   

  1. 1. The Institute of Agro-Food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403
    2. College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
    3. Shanghai Sub-Center for New Plant Variety Tests, Ministry of Agriculture and Rural Affairs, Shanghai 201415, China
  • Received:2025-01-17 Online:2026-02-25 Published:2026-03-24

Abstract:

To provide a scientific basis for the identification of germplasm resources and the formulation of breeding strategies in the genus Hippeastrum, this study comprehensively employed principal component analysis (PCA), correlation analysis, and cluster analysis to conduct distinctness, uniformity, and stability (DUS) testing on 164 Hippeastrum cultivars based on 29 phenotypic traits. The results showed that the intraspecific coefficient of variation for the individual measurement traits ranged from 5.22% to 15.57%. Among all traits, the Shannon-Wiener diversity index of flower: pedicel length was the highest, reaching 1.90. For the group visual observation traits, the top three traits with the highest Shannon-Wiener diversity index were flower: shape of outer tepal (1.865), flower: color pattern (1.724), and flower: color of inner side (1.705). Eight principal components were extracted from the 29 traits, with a cumulative contribution rate of 66.95%. The factors with the highest loadings on these eight principal components were flower: width of outer tepal, pistil: color, flower: diameter, flower: shape in front view, inflorescence: number of flowers, peduncle: anthocyanin coloration at base, flower: shape of outer tepal, flower: color pattern. Among the tested traits, flower: color pattern, flower: shape of outer tepal showed significant (p<0.01) correlations only with a few traits, while no significant correlations were observed with most other traits. The 164 cultivars were classified into 3 groups, containing 78, 65, and 21 cultivars respectively, by cluster analysis.

Key words: Hippeastrum, genetic diversity, identification of germplasm resource

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