基于DNA条形码技术的中药材木通种子鉴定研究
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国家自然科学基金项目(81703659);河北省教育厅青年拔尖人才项目(BJ2016002);河北省高校重点学科建设项目(冀教高[2013]4号)


Identification of the Seeds of Akebiae Caulis,a Chinese Medicinal Material by DNA Barcoding Technique
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    摘要:

    目的:利用核糖体内部转录间隔区2(ITS2)及叶绿体psbA-trnH序列对中药材木通种子进行鉴定,建立其种子DNA条形码鉴定方法,保障中药材木通种子的准确性。方法:收集木通种子样品15份,通过提取DNA、聚合酶链式反应(PCR)扩增、双向测序,获取其ITS2及psbA-trnH序列。基于BLAST分析、邻接(NJ)系统发育树构建进行物种鉴定分析。结果:共获得4种类型ITS2序列,2种类型psbA-trnH序列。ITS2及psbA-trnH均可区分木通与川木通、关木通,但ITS2序列可以区分木通与三叶木通、白木通,psbA-trnH序列无法区分木通与三叶木通、白木通。结论:DNA条形码技术可用于木通种子及其易混伪品的鉴定。

    Abstract:

    By internal transcribed spacer 2(ITS2)and plastid intergenic region psbA-trnH sequences,the Akebiae Caulis seeds would be identified and DNA barcoding technology has been established,to guarantee the species authenticity of Akebiae Caulis seeds,a Chinese medicinal material.Methods:A total of 15 samples of Akebiae Caulis seeds were collected from different areas.Their ITS2 and psbA-trnH sequences have been obtained after DNA extraction,polymerase chain reaction(PCR)and bi-directional sequencing.Species identification analysis was based on BLAST analysis and neighbor joining(NJ)phylogenetic tree method.Results:A total of 4 types of ITS2 sequences and 2 types of psbA-trnH sequences were obtained.ITS2 and psbA-trnH sequences can distinguish Akebiae Caulis and Clematidis Armandii Caulis,and Caulis Aristolochiae Manshuriensis.But the ITS2 sequence can distinguish Akebia quinata and Akebia trifoliata,Akebia trifoliata var.austrais.The psbA-trnH sequence cannot distinguish Akebia quinata and Akebia trifoliata,Akebia trifoliate var.austrais.Conclusion:DNA barcoding can be useful for origin identification of Akebiae Caulis seeds and its adulterants.

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穆威杉,于娟,赵晴,史萌萌,金钺,谢红波,刘金欣,石林春.基于DNA条形码技术的中药材木通种子鉴定研究[J].世界中医药,2020,(09).

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  • 收稿日期:2020-02-10
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  • 在线发布日期: 2020-05-25
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