The wolfberry is an important medicinal plant. Clarifying the origin of new taxa and the phylogenic relationship among Chinese Lycium species (Solanaceae) will provide a scientific basis to guide research on the germplasm and variety breeding. In the present paper,we reported the results of a preliminary phylogenetic study of the seven Chinese taxa in Lycium using the DNA sequence data from the nuclear granule-bound starch synthase I gene (GBSSI). Maximum-likelihood(ML) analysis of the data showed that species of Chinese Lycium belonged to a monophyletic OId World clade and are placed in four strongly supported subclades. The phylogenetic results suggested that hybridization may play an important role in the origin of new taxa in Lycium. In addition, our result also indicated that L. barbarurn is highly divergent among the seven taxa of Lycium.%为探讨枸杞属新类群的起源及国产枸杞属植物的亲缘关系,该文使用核基因颗粒性结合淀粉合成酶基因(GBSSI)片段,对国产7个类群的枸杞属植物进行了分子系统学研究.结果表明:中国分布的枸杞属植物属于旧世界类群并分为4个强烈支持的分支,而新类群的形成与杂交密切相关.此外,初步分析还显示宁夏枸杞有较高的遗传分化.
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