基于特异性、一致性、稳定性测试的朱顶红品种资源遗传多样性分析OA

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),cor-relation analysis,and cluster analysis to conduct distinctness,uniformity,and stability(DUS)testing on 164 Hipp-eastrum 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 pat-tern(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,inflores-cence:number of flowers,peduncle:anthocyanin coloration at base,flower:shape of outer tepal,flower:color pat-tern.Among the tested traits,flower:color pattern,flower:shape of outer tepal showed significant(p<0.01)cor-relations only with a few traits,while no significant correlations were observed with most other traits.The 164 culti-vars were classified into 3 groups,containing 78,65,and 21 cultivars respectively,by cluster analysis.