[关键词]
[摘要]
目的 分析不同来源籽用栝楼资源的遗传多样性。方法 应用SRAP分子标记技术并结合ITS序列分析对11份籽用栝楼资源30个样本进行遗传特征研究,并分别应用mega 5.0和NTSYS-pc 2.1软件对ITS序列及SRAP扩增条带进行聚类分析。结果 栝楼与双边栝楼ITS序列存在稳定的碱基差异;15对SRAP分子标记引物扩增得到清晰条带165条,其中多态条带136条,多态率为82.4%,聚类结果显示在相似度为0.18时栝楼与双边栝楼资源分为2大类群,双边栝楼来源的主栽品种遗传相似度较大,在相似度为0.90时分为3个分支。结论 籽用瓜蒌来源品种多样,主要来源于双边栝楼,且各地栽培资源遗传差异较小。
[Key word]
[Abstract]
Objective To reveal the genetic diversity of cultivating resources of Trichosanthes sp. from different areas. Methods The genetic background of 11 populations (including 30 samples) of Trichosanthis Fructus were researched by both ITS and SRAP molecular markers. The software mega 5.0 and NTSY-pc 2.1 were taken to analysis the ITS sequences and SRAP polymorphic bands data respectively. Results There are obvious mutation in ITS sequences among T. kirilowii and T. rosthornii, ITS sequences could authenticate the different resources in some extent. 165 SRAP bands were amplified by using the optimized 15 primer pairs, and 136 were polymorphic bands, the polymorphic rate was up to 82.4%. The samples were separated into two clusters at the genetic similarity coefficient of 0.18, one cluster gathered the samples of Yuelou Num.8 (T. kirilowii) and the other cluster further separated into three sub-clusters at the coefficient of 0.90, which were mainly T. rosthornii. Conclusion There are several species of Trichosanthes have been used to harvest the seeds in China, and the major one is T. rosthornii. The cultivating resources of T. rosthornii have little difference in genetic backgrounds.
[中图分类号]
[基金项目]
国家现代农业产业技术体系专项(CARS-21);湖南省自然科学基金项目资助(2016JJ6062);作物种质创新与资源利用重点实验室(省部共建国家重点实验室培育基地)科学基金开放项目(15KFXM10);湖南省农科院科技创新项目(2016QN01)