黑龙江省梨栽培品种(系)花粉形态的比较观察

利用扫描电镜和光学显微镜系统观察了黑龙江省梨20个栽培品种(系)花粉粒的形态并进行聚类分析。结果表明：同一品种花粉粒的大小、形态和纹饰特征比较稳定，不同品种间存在差异，杂种后代纹饰的变化，反映出黑龙江省梨品种其血缘关系的多样性，依据纹饰和聚类分析结果是梨品种鉴别的有效方法之一，具有一定的生产实践价值。

COMPARATIVE OBSERVATIONS ON MORPHOLOGICAL CHARACTERISTICS OF POLLEN OF CULTIVAR OF PEAR IN HEILONGJIANG PROVINCE

The pollen microscopy of 20 pear cultivable varieties(strains)in Heilongjiang Province, wire observed systematically with the aid of scanning electron microscope and optical microscope.Cluster analysis was carried out to study the useful value of palynology in the study of identification of variety and parent selection. The results showed that the pollen size,shape and surface sculpture of the same variety in pollen characteristics were stable. but there were certain differences exist in different variety. The transmutation in surface sculpture of filial generation showed that they were diversity in coefficient of relation of variety. The surface sculpture observation integrated with cluster analysis was a resultful method to group varieties of pear with the aid of palynology. the great value to put in practical of production.