菊苣主要表型性状的多元统计分析

为探明菊苣不同来源、不同类型种植材料的表型变异特征及其原因,通过变异系数、相关性、聚类和主成分分析对80份菊苣属材料表型性状进行多元统计分析。结果表明,1)不同菊苣种质资源的形态学特征存在广泛的变异,3级生殖枝数变异幅度最大,变异系数为31.11%;2)菊苣形态学特征间存在显著相关性,叶片宽大类型的菊苣种质,植株高、生殖枝多、茎秆粗壮,但单个花序小花数少;3)聚类分析表明,不同菊苣种质资源可划分为3个形态类型,即窄叶匍匐型、中等宽叶直立型和阔叶直立型;4)主成分分析表明,不同材料间和类型间的差异主要来源于叶片大小、株高和小花数、小花直径。

Multiple statistical analysis of the phenotypic characters of Cichorium intybus

Based on the variation coefficient, correlation analysis, cluster analysis and principal component analysis of 80 chicory (Cichorium intybus) materials from different origins, the phenotypic characteristics variations were analysed for an explaination of their geographical origins. There was wide variance of phenotypic characters among the different chicory germplasm resources. The third grade fertile tillers had the most significant variance coefficient of 31.11%. There were significant correlations among morphological characteristics. Chicory with a wide leaf was from tall plants with many strong reproductive branches but fewer single flowers. Clustering analysis showed that the materials could be divided into three groups with similar phenotypes: narrow leaved creeping type, mid-wide leaved erect type, and wide leaved erect type. The principal coordinate analysis indicated that the differences between chicory materials were derived from leaf size, plant height, flower number, and reproductive flower diameter.