利用RAPD研究桂林桂花品种间的亲缘关系

采用随机扩增多态性DNA(RAPD)技术,从100个随机引物中筛选出扩增效果较好的20个引物,分 析桂林市23个桂花品种的基因组多态性。20个随机引物共检测到193个位点,其中多态位点114个,占 59.1%。并进行了聚类分析,构建出树状聚类图,将这些品种划分为4个品种群,与传统分类学结果一致。结 果表明,以基因型而不是以表现型为基础,分析桂花品种间的区别是可能的。该技术为解决桂林市的桂花品 种分类问题提供了重要依据。

Identifying Osmanthus fragrans cultivars in Guilin City and evaluating their genetic relationships by RAPD markers

Random amplified polymorphic DNA(RAPD)markers were applied to analyze 23 Osmanthus fragrans cultivars in Guilin City. Among the total 193 fragments generated by 20 selected primers(among 100 primers),114 appeared to be polymorphic(59.1%). Cluster analysis based on the RAPD results was performed and dendrogram was constructed. These cultivars tested by RAPD were divided into 4 cultivar groups. The result was consistent with that from traditional taxonomy analysis. The RAPD study illustrated that it is possible to analyze intra-cultivar variation of O.fragrans cultivars on the basis of genotype rather than phenotype and therefore, offered significant evidences in solving taxonomic problem of O.fragrans cultivars in Guilin City.