关键词: 龙眼, 分子标记, 遗传图谱

Abstract: A big F₁ population of‘Fengliduo ×Dawuyuan’were created by crossing between a high quality cultivar‘Fengliduo’and a large fruit size main cultivar‘Dawuyuan’. Among the hybrid population,94 F1 individuals were randomly chosen and used as the mapp ing population. Based on the mapp ing population, a molecular genetic linkage map of longan was constructed with RAPD, ISSR, SRAP and AFLP molecular markers. According to the linkage analysis by JoinMap3.0, the molecular linkage map of‘Fengliduo’fell into 21 linkage group s, which contained 183 markers, with an average interval of 5184 cM and covered a total distance of 965.1 cM; While the molecular linkage map of‘Dawuyuan’fell into 22 linkage group s, which contained 251 markers, with an average interval of 4.65 cM and covered a total distance of 1 064.8 cM. This was the first report about high-density molecular genetic map for longan and would lay a solid foundation for gene location and marker assited selection in longan breeding.

Key words: longan, molecular marker, genetic map