Walnut (Juglans regia L) is the world's most important oil nuts and woody tree species, which is belonging to the genus Juglans. Walnut is widely distributed and cultivated in China. There are rich walnut resources including common walnut and wild resources in some main areas of our country. It is vital to develop walnut varieties which can simultaneously produce nuts and woody, for meeting the needs of domestic and foreign markets.In this study, germplasm resources of Qinglin-walnut collected from Shandong...