Malus sieversii (Ledeb.) Roem. is a remnant of the tertiary species and is also believed to be progenitor of cultivated apple(M. domestica). In China, M. sieversii is mainly distributed in the Ily State, Xinjiang Autonomous Region. In this study, trees in 3 M. sieversii populations (i.e., Daxigou Huocheng, Mohe Gongliu and Jiaowutuohai Xinyuan populations) were used as materials and genetic diversity of M. sieversii were discussed by measuring several phenotypic traits including morphological trai...