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山茶属金花茶组金花茶系的AFLP分析

AFLP Analysis of Ser. Chrysantha Chang (Camellia, Sect. Chrysantha)

  • 摘要: 应用扩增片段长度多态性(AFLP)分子标记方法,对分布于我国的金花茶组金花茶系的35个样品进行了分析,样品包括了《中国植物志》收录的该类群的15种2变种、2个未收录的种和4个已归并但在分类处理上存在分歧的种。4对引物组合:E-ACG/M-CAG,E-ACG/M-CTG,E-AGG/M-CTG,E-AGG/M-CAT用于选择性扩增,其中EcoR 引物的5'端用荧光染料进行标记。这4个引物组合共得到298条扩增带,其中278条带是多态性的。计算了样品间的Nei和Li(1979)相似性系数,基于这一相似性系数应用UPGMA法进行聚类分析,得到了树状分枝图。分析结果表明:(1)贵州金花茶是一个好种;(2)支持将毛籽金花茶、陇瑞金花茶、弄岗金花茶和大样弄岗金花茶归并到淡黄金花茶的观点;(3)薄叶金花茶、小花金花茶、夏石金花茶和小瓣金花茶之间的亲缘关系较近。

     

    Abstract: Amplified fragment length polymorphism (AFLP) was assessed in 35 accessions of Ser. Chrysantha Chang (Camellia, Sect. Chrysantha) collected from China, including 14 species and 1 variety following Flora of China and other 7 species being controversial in taxonomy. Four primer combinations E-ACG/M-CAG,E-ACG/M-CTG,E-AGG/M-CTG and E-AGG/M-CAT were used for selective amplification, from which Eco RⅠ primers were fluorescent dye-labeled. A total of 298 fragments were detected, in which 278 are polymorphic. We analyzed the AFLP data using Nei & Li similarity coefficient and UPGMA Cluster method. The result suggested that (1) C. huana was a distinctive species; (2) C. longgangensis, C. longruiensis, C. ptilosperma, and C. grandis should be merged into C. flavida .; (3) C. chrysanthoides, C. micrantha, C. xiashiensis and C. parvipetala are closely related and probably conspecific.

     

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