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1.承德医学院 河北省中药研究与开发重点实验室, 河北 承德 067000
2.西藏大学 医学院, 拉萨 850000
3.中国医学科学院&北京协和医学院 药用植物研究所, 北京 100193
4.中国中医科学院 中药研究所, 北京 100700
赵晴,在读硕士,从事中药资源相关研究,E-mail:zhaoqing_95@163.com
刘金欣,博士,副教授,从事中药资源相关研究,Tel:0314-2290474,E-mail:liujx_23@163.com
赵春颖,硕士,教授,从事中药资源相关研究,Tel:0314-2290474,E-mail:zhaochunying1908@163.com
纸质出版日期:2020-07-20,
网络出版日期:2019-12-31,
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赵晴,谢红波,央拉等.基于DNA条形码技术的北柴胡种子分子鉴定[J].中国实验方剂学杂志,2020,26(14):182-189.
ZHAO Qing,XIE Hong-bo,YANG La,et al.Molecular Identification of Bupleurum chinense Seeds Based on DNA Barcoding Technology[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(14):182-189.
赵晴,谢红波,央拉等.基于DNA条形码技术的北柴胡种子分子鉴定[J].中国实验方剂学杂志,2020,26(14):182-189. DOI: 10.13422/j.cnki.syfjx.20200650.
ZHAO Qing,XIE Hong-bo,YANG La,et al.Molecular Identification of Bupleurum chinense Seeds Based on DNA Barcoding Technology[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(14):182-189. DOI: 10.13422/j.cnki.syfjx.20200650.
目的
2
建立基于核糖体DNA内转录间隔区(ITS)序列的北柴胡种子分子鉴定方法,保障北柴胡栽培种子的物种准确。
方法
2
收集北柴胡及主要栽培柴胡属物种种子、市售北柴胡种子样品共59份,探究不同取样量和不同水浴条件对种子DNA提取质量的影响,建立柴胡属种子DNA提取方法;通过聚合酶链式反应(PCR)和双向测序得ITS条形码序列。从GenBank下载34条北柴胡、红柴胡、黑柴胡等主要栽培柴胡属物种ITS序列,丰富北柴胡种子鉴定数据库;利用MEGA-X 10.0.5进行变异位点分析并构建邻接(NJ)系统发育树,考察ITS序列对北柴胡种子的物种鉴定能力;基于BLAST方法和NJ系统发育树法对市售北柴胡种子进行DNA条形码鉴定。
结果
2
共获得59条北柴胡、红柴胡、三岛柴胡及市售北柴胡种子的ITS序列,北柴胡ITS序列可分为6个单倍型,包含7个变异位点,NJ系统发育树表明北柴胡所有单倍型可形成独立的枝,与所收集样品中其他柴胡属栽培物种可相互区分,具备北柴胡种子物种鉴定能力。基于ITS条形码序列鉴定发现19份市售北柴胡种子中有3份为三岛柴胡,伪品率15.8%。
结论
2
基于ITS序列的DNA条形码技术可以准确可靠地鉴定北柴胡种子及其易混品,可为我国中药材种子规范化建设提供参考。
Objective
2
To establish a molecular identification method for
Bupleurum chinense
seeds based on ribosomal DNA internal transcribed spacer (ITS) sequence
ensuring the species authenticity of the cultivated seeds of
B. chinense
.
Method
2
A total of 59 seeds samples of
B. chinense
and its main cultivated species
marketed
B. chinense
were collected. The effect of different sampling amounts and different water bath conditions on DNA extraction quality of the seeds was investigated
a DNA extraction method for seeds of
Bupleurum
was established. Their ITS sequences were obtained by polymerase chain reaction (PCR) and bidirectional sequencing. In addition
34 ITS sequences of main cultivated
Bupleurum
species
such as
B. chinense
B. scorzonerifolium
B. falcatum
and
B. smithii
were downloaded from GenBank to enrich identification database of
B. chinense
seeds. The neighbor-joining (NJ) dendrogram were constructed by MEGA-X 10.0.5 software to investigate the the species identification ability of ITS sequences for
B. chinense
seeds. And DNA barcoding identification of marketed
B. chinense
seeds was conducted based on BLAST method and NJ dendrogram method.
Result
2
In total
59 ITS sequences were obtained. ITS sequences of
B. chinense
could be divided into six haplotypes
including seven variable sites. The NJ dendrogram indicated that all the haplotypes of
B. chinense
could form independent branches
which could be distinguished from other cultivated species of
Bupleurum
in the collected samples
and possessed the ability to identify species of
B. chinense
seeds. Based on ITS sequence barcoding identification
3 of the 19 marketed
B. chinense
seeds were
B. falcatum
with a counterfeit rate of 15.8%.
Conclusion
2
DNA barcoding technology based on ITS sequence can accurately and reliably identify
B. chinense
seeds and its adulterants
providing reference for the standardization construction of Chinese medicinal materials seeds.
北柴胡种子DNA条形码核糖体DNA内转录间隔区(ITS)序列分子鉴定混伪品三岛柴胡
Bupleurum chinenseseedsDNA barcodingribosomal DNA internal transcribed spacer (ITS) sequencemolecular identificationadulterantsB. falcatum
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