Abstract: 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 select ion.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.

Key words: Pear, pollen characteristics, surface topography, perforation