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期 刊 ：植物遗传资源学报 2016年 17卷 4期

关键词：新疆野苹果；遗传多样性；性状分析；相关系数；

Keywords:Malus sieversii, Genetic diversity, Character analysis, Correlation coefficient,

摘 要 ：摘要：【目的】为加强野苹果种质资源利用与研究，促进野苹果研究工作，【方法】以三年来调查收集的新疆野苹果（赛威士苹果）的129单株资源为材料、对单果重、果实纵横经、叶片大小，等12个数量性状和叶片颜色、叶尖类型，等5个质量性状进行遗传多样性及相关性分析。【结果】分析结果表明：叶片颜色、叶尖类型、叶姿、叶缘、叶面状态5个质量性状分布频率较集中；单果重、果实纵横经、叶柄长、叶片长宽、可溶性固形物、干周、树高都存在较大的变异，变异系数幅度为16%-51%。各性状多样性指数也较大，均值为1.9264，叶片长的多样性指数最小，为1.7359；果梗长的多样性指数最大，为2.0525.【结论】新疆野苹果资源拥有丰富的遗传多样性，在于果实相关性状的多样性指数高，且变异幅度大，表明丰富的遗传多样性是新疆野苹果资源的重要特征。

Abstract:Abstract:【Objective】This research aim to enhance the utilization and research of wild apple germplasm resources, and promote the research of the wild apple.【Method】We used 129 single-plant of Xinjiang wild apple resources, collected in recent three years, as material to analyze genetic diversity and correlation of 12 quantitative traits(single fruit weight, fruit diameter, leaf size, etc. ) and 5 qualitative traits(leaf color, leaf opex type, leaf margin, etc.).【Result】The results showed that: qualitative traits such as leaf color, leaf opex, leaf margin, leaf shape and leaf surface had relatively concentrated distribution of frequency; Quantitative traits for example , single fruit weight, fruit diameters, petiole length , leaf blade width, soluble solid, trunk perimeter and tree heights had a large variation range, variable coefficients range from 16% to 51%. Diversity index of each traits were also larger, with mean value of 1.9264, minimum in leaf length (1.7359); maximum in fruit stem( 2.0525).【Conclusion】Xinjiang wild apple resources are abundant in genetic diversity, large diversity index and variation ranges are particularly reflected爄n fruit related characters. These indicate that abundant genetic diversity is an important characteristic of Xinjiang wild apple resources.

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