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以甘肃定西文冠果人工种群的枝叶为主要研究对象,调查了试验区内59株文冠果枝叶的5个表型性状,利用方差分析和变异系数研究了文冠果枝叶在分布区内不同个体间、不同枝条部位间和不同新梢类型间的变异情况。结果表明:文冠果复叶表型性状在种群内不同个体之间差异极显著(P﹤0.01),且存在着较大的变异幅度,但各性状指标的变异幅度不一致,其变异系数大小依次为小叶长(18.70%)﹥小叶宽(17.96%)﹥复叶长(17.04%)﹥小叶对数(14.14%)﹥小叶数量(13.07%);在不同枝条部位间(顶复叶和侧复叶)复叶特征差异不大且规律不一致,只有小叶宽、小叶对数和小叶数量3个性状指标差异极显著(P﹤0.01);在不同新梢类型间(被毛枝条和无毛枝条)复叶特征差异也较大,除小叶对数差异不显著外(P﹥0.05),其余指标差异均显著(P﹤0.05)或极显著(P﹤0.01)。此外,文冠果新枝类型与植株的抗病虫能力密切相关,其中新枝朱红无毛的植株病虫害很轻,而新枝褐色有毛的植株病虫害非常严重,此特征可作为文冠果植株初步选优的基础。
Taking the branches and leaves of Artemisia sphaerocephala population in Gansu as the main research object, the five phenotypic traits of 59 branches and leaves of Xanthoceras sorbifolia were investigated. The variance analysis and coefficient of variation Variation among individuals, different branches and different shoot types. The results showed that there were significant differences in the phenotypic traits of the compound leaves between the two groups (P <0.01), and there was a large variation range, but the variation range of each trait index was inconsistent. The coefficient of variation The results were as follows: length of leaflet (18.70%), leaflet width (17.96%), length of compound leaf (17.04%), number of leaflets (14.14%), number of leaflets (13.07%), (P <0.01). Among the different shoot types (coarser branches and no-shoot branches), there were significant differences among the three traits in leaf width, leaf number and leaf number. The differences of the compound leaves were also significant, except for the difference of the logarithm of the leaflets was not significant (P> 0.05), the other indexes were significantly different (P <0.05) or extremely significant (P <0.01). In addition, the new type of Xanthoceras sorbifolia is closely related to the resistance of the plants to pests and diseases. Among them, the fresh and scarlet plants of new branches and scarves are very light and the plant diseases and insect pests of fresh and brown hairy plants are very serious. Foundation.