摘要
目的:建立山茱萸的SCAR标记,为山茱萸药材分子鉴定提供科学依据.方法:用随机引物进行RAPD筛选,获取特异的RAPD标记条带,分离提取RAPD标记条带,进行克隆和测序,根据测定RAPD标记条带的两端序列设计1对特异引物进行常规PCR反应,获得SCAR标记.结果:根据RAPD标记条带的序列设计筛选了4对特异引物,其中YST38,YST43分别对7个山茱萸品种样本的DNA进行SCAR扩增,7个山茱萸栽培品种均能产生单一的PCR条带,可以用作山茱萸的鉴别;而YST38对圆柱形果型、长梨形果型还有1条特异性条带,可以做为这2个品种的鉴别依据;YST39对7个山茱萸品种进行扩增,纺锤形果型样本的谱带大小(350～400 bp)比其余6个果型的谱带大小(650～700 bp)短了300 bp左右,这条谱带可以做为纺锤形果型的鉴别依据;YST92对圆柱形果型、长梨形果型均产生了1条600～700 bp的条带,椭圆形果型、短圆柱形果型产生了1条200～300 bp的条带,长圆柱形果型、纺锤形果型、短梨形果型3个果型无扩增,YST92可用来筛选山茱萸的几种果型.结论:建立的SCAR标记,条带清晰明亮,结果稳定,可作为山茱萸品种选育和药材分子鉴定的依据.
Abstract
Objective: To establish sequence characterized amplified region markers of Cornus officinalis and provide a scientific basis for molecular identification of C. officinalis. Method: The random primer was screened through RAPD to obtain specific RAPD marker bands. The RAPD marker bands were separated, extracted, cloned and sequenced. Both ends of the sequence of RAPD marker bands were determined. A pair of specific primers was designed for conventional PCR reaction, and SCAR marker was acquired. Result: Four pairs of primers were designed based on the sequence of RAPD marker bands. The DNA of the seven varieties of C. officinalis was amplified by using YST38 and YST43 primer. The results showed that seven varieties of C. officinalis were able to produce a single PCR product. It was an effective way to identify C. officinalis. The varieties with cylindrical and long-pear shape fruits amplified by YST38 showed a specific band, which could be used as the evidence of variety identification. Seven varieties of C. officinalis were amplified by using primer YST39. But the size of band of the variety with spindly shape fruit(350-400 bp) was about 300 bp, which was shorter than those of the variety with the other shape fruits of C. officinalis(650-700 bp). The variety with the spindly shape fruit could be identified through this difference. The primer YST92 could produce a fragment from 600-700 bp in the varieties with cylindrical and long-pear shape fruits, a fragment from 200-300 bp in the varieties with oval and short-cylindrical shape fruits and had no fragment in the varieties with long cylindrical, elliptic and short-pear shape fruits, which could be used to select the different shapes of C. officinalis. Conclusion: SCAR mark is established and can be used as the basis for breeding and distinguishing the verieties of C. officinalis.
国家科技期刊平台
NSTL
维普
万方数据