| 因此，本实验结果认为四季蜜可能起源于云南。这与钟伟等研究结果不一致。要进一步确认热带龙眼及四季蜜的起源，还需采集更多代表基因型与分子标记技术相结合进行研究。龙荔与龙眼是同属不同种的近缘种，且为半野生种。本实验分析发现，龙荔与泰国依登和苗翘亲缘关系最近，但相似系数都没有大于0.700。SCoT分子标记聚类图中龙荔并不是在遗传相似系数最低的时候分开的，这可能是由于SCoT分子标记能产生与性状联系的特点有关。
4结论
利用SCoT和ISSR分子标记技术对国内外龙眼种质资源DNA的遗传多样性进行了检测，两种分子标记都可以把37份龙眼材料区分开，可以作为龙眼分类的有力工具。UPGMA聚类分析表明，中国的龙眼种质遗传多样性较高，泰国和越南较低。
致谢：本文对材料收集过程给予帮助的云南农业科学院热带经济作物研究所黄家雄研究员和其他专家，谨此一并致谢。
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