Abstract: The establishment of the sweet potato molecular genetic map is of great significance on development and application of molecular breeding technology system. At present, while studies of sweet potato molecular genetic mapping have being made certain progress, still there are a lot of technical bottlenecks, such as application and optimization of mapping strategy. The paper firstly summarized the genetic research progress of sweet potato in both classical and molecular aspects；and three methods and strategies of molecular genetic mapping on sweet potato were analyzed in detail；then the approaches of improving efficiency and quality of sweet potato mapping were discussed, including optimizing the quality of mapping groups, overcoming the partial separation of progeny, integrating genetic linkage maps derived from different groups, and choosing appropriate molecular markers；finally, the importance of chromosome association in genetic mapping was emphasized, and what need to be enhanced in the field of molecular breeding was also put forwarded. All of these were in order to establishing a precise molecular graph and providing new ideas on sweet potato molecular breeding using genetic map.

Key words: Sweet potato , Genetic map , Optimization strategy