【目的】分析文冠果(Xanthoceras sorbifolium)无性系间表型性状、叶用成分及相关酶活性的变异程度和相关关系,开展综合评价,为优良叶用文冠果无性系的定向培育、引种推广提供科学依据。【方法】以引种到江苏盐城林场的 23 个文冠果无性系为研究对象,通过比较其变异系数分析表型性状、叶用成分及相关酶活性的变异程度,采用 Pearson 相关系数评价表型性状间、叶用成分及相关酶活性间的相关关系,运用主成分分析、系统聚类法对各无性系进行综合评价和分类。【结果】参试文冠果无性系的 15 个指标存在不同程度的变异,变异范围为 6.17%~43.00%。表型性状间、叶用成分及相关酶活性间共有9对指标呈极显著相关(P<0.01),5 对指标呈显著相关(P<0.05)。【结论】参试文冠果无性系的叶性状在各无性系间存在丰富变异,筛选潜力大。本研究筛选出的优良无性系为 50、Y8 和 Y11,可在盐城地区进一步推广栽培。

【Objective】 This study aimed to evaluate the variation in phenotypic traits, leaf nutrient content, and enzyme activities among 23 clonal lines of Xanthoceras sorbifolium, and to examine their interrelations. The findings aim to provide a scientific foundation for the targeted cultivation, introduction and promotion of superior clonal lines of leaf-use X. sorbifolium. 【Method】 Twenty-three clonal lines of X. sorbifolia, introduced to Yancheng Forest Farm in Jiangsu Province, were used as research subjects. Variation was assessed by analyzing the coefficient of variation across 15 key indicators. Pearson correlation coefficients were calculated to determine the relationships between phenotypic traits, leaf nutrients and enzyme activities. Principal component analysis and hierarchical clustering were applied to comprehensively evaluate and classify the clonal lines. 【Result】 The 15 indicators exhibited varying degrees of variation, with coefficients ranging from 6.17% to 43.00%. Significant correlations were identified: nine pairs of indicators showed extremely significant correlations (P<0.01), while five pairs demonstrated significant correlations (P<0.05).【 Conclusion】 Leaf traits among the clonal lines of X. sorbifolium display substantial variation, indicating strong potential for selective improvement. The superior clonal lines identified were 50, Y8 and Y11, which are recommended for further cultivation and introduction in the Yancheng region.