In this experiment loquat genetic resources including 11 main species or types in Eriobotrya, 65 accessions of loquat germplasm as well as 12 accessions of 'jiefangzhong' materials from 12 different production areas were used as materials to establish the method of leaf DNA extraction, to optimize the RAPD reaction system, and to conduct RAPD analyses to discuss the genetic relationship and genetic diversity of loquat germplasm combined with clustering analysis. The results were as follows:1. The availa...