收稿日期: 2026-04-25
录用日期: 2026-05-30
网络出版日期: 2026-06-30
基金资助
海南省重点研发项目(ZDYF2025XDNY071)；中央财政林业草原改革发展资金(林业草原科技推广)项目(琼[2025]TG-5)
Study on Phenotypic Trait Diversity of Yulania biondii
Received date: 2026-04-25
Accepted date: 2026-05-30
Online published: 2026-06-30
秦梦瑶, 王 晶, 李玉萍, 刘青发, 黄 杰, 王亚玲 . 望春玉兰表型性状多样性研究[J]. 亚热带植物科学, 2026 , 55(3) : 351 -361 . DOI: 10.3969/j.issn.1009-7791.2026.03.009
In order to reveal the phenotypic diversity characteristics of Yulania biondii, this study selected 175 twelve-year-old seed-grown individuals as materials, systematically determined 33 phenotypic traits of flowers, leaves and fruits for two consecutive years, and carried out research adopting diversity index, coefficient of variation, principal component analysis and cluster analysis. The results showed that the diversity indices of 20 qualitative and pseudo-qualitative traits ranged from 0.26 to 1.52, with floral traits having the highest diversity level, followed by fruit traits and leaf traits; the coefficients of variation of 13 quantitative traits were 9.73% to 24.45%, and pedicel length, stipule scar length and fruit length were the traits with the highest variation degree in corresponding parts respectively. Correlation analysis of quantitative traits showed that 19 trait combinations were significantly or extremely significantly correlated. Twelve principal components were extracted with a cumulative contribution rate of 73.01%, and the first three principal components respectively reflected the variation characteristics of floral morphology and color, leaf morphology and filament color. Q-mode cluster analysis classified 175 Y. biondii individuals into 7 groups. It confirmed that the presence or absence of sepaloid tepals, the quantity and color of petaloid tepals, the posture of outer whorl petaloid tepals, flower shape and leaf shape were the core indicators for the classification of Y. biondii germplasm resources. The seed-grown population of Y. biondii exhibits rich phenotypic diversity, and the research results can provide a scientific basis for germplasm conservation, evaluation and superior individual selection.
Key words： Yulania biondii; phenotypic traits; diversity; cluster analysis
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