Variability of Pyrus communis accessions in China assessed using multivariate analysis

文献类型： 外文期刊

第一作者： Mu, HongMei

作者： Mu, HongMei;Du, Xiaoyun;Li, Yuanjun;Ci, Zhijuan;Zhang, Shujun;Geng, Qiang;Maimaiti, Aishajiang

作者机构：

关键词： Pyrus communis; fruit quality; biodiversity; numerical classification; principal component analysis

期刊名称：EUROPEAN JOURNAL OF HORTICULTURAL SCIENCE （ 影响因子：1.074； 五年影响因子：1.641 ）

ISSN： 1611-4426

年卷期： 2022 年 87 卷 2 期

页码：

收录情况： SCI

摘要： Twenty-three morphometric fruit traits for 47 common pear (Pyrus communis L.) cultivars and hybrids were recorded from trees growing in the fruit tree resources nursery of the Yantai Academy of Agricultural Sciences, Shandong, China, to provide information for classification and utilization of common pear cultivars. The frequency distribution, coefficient of variation, and Shannon-Weaver diversity index were calculated. A Q-mode cluster analysis and principal component analysis were used to evaluate groups among the accessions and pomological characters. Significant diversity in fruit characters was observed among the accessions. The Shannon-Weaver index ranged from 0.42 to 2.02. The average coefficient of variation was lowest for total soluble solids concentration (8.38%) and highest for fruit peel color (40.6%). The Shannon-Weaver index for 11 qualitative characters ranged from 0.42 to 1.33 and indicated that the qualitative characters showed rich diversity. The first nine principal components accounted for 85.40% of the total variance. Principal component biplots and hierarchical cluster analysis categorized the accessions into five main groups on the basis of the pomological traits. The results provide information on morphological relationships among common pear cultivars grown in China and indicate there is high phenotypic diversity that can be utilized in pear breeding programs.

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