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1.贵州医科大学 药学院,贵阳 550025
2.贵州省中国科学院天然产物化学重点实验室,贵阳 550014
3.省部共建药用植物功效与利用国家重点实验室,贵阳 550014
梁芳瑜,在读硕士,从事中药资源保护与应用研究工作,E-mail:457164470@qq.com
* 覃容贵,博士,教授,从事中药资源保护与应用研究工作,E-mail:1346812934qq.com
收稿日期:2021-08-26,
网络出版日期:2021-09-28,
纸质出版日期:2021-12-05
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梁芳瑜,何茂秋,徐昌艳等.宽叶缬草SRAP-PCR反应体系的优化及引物筛选[J].中国实验方剂学杂志,2021,27(23):163-171.
LIANG Fang-yu,HE Mao-qiu,XU Chang-yan,et al.Optimization of SRAP-PCR System for Valeriana officinalis var. latifolia and Primer Screening[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(23):163-171.
梁芳瑜,何茂秋,徐昌艳等.宽叶缬草SRAP-PCR反应体系的优化及引物筛选[J].中国实验方剂学杂志,2021,27(23):163-171. DOI: 10.13422/j.cnki.syfjx.20211412.
LIANG Fang-yu,HE Mao-qiu,XU Chang-yan,et al.Optimization of SRAP-PCR System for Valeriana officinalis var. latifolia and Primer Screening[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(23):163-171. DOI: 10.13422/j.cnki.syfjx.20211412.
目的
2
建立宽叶缬草的相关序列扩增多态性(SRAP)-聚合酶链式反应(PCR)反应体系,为宽叶缬草良种选育提供理论和技术基础。
方法
2
采用单因素试验考察
Taq
Mix用量,Mg
2+
浓度,模板DNA浓度,
Taq
DNA聚合酶浓度对宽叶缬草SRAP-PCR扩增结果的影响,以此为基础进行正交试验,优化宽叶缬草SRAP-PCR反应体系,并在最优反应体系条件下筛选可用于宽叶缬草遗传多样性研究的有效引物。
结果
2
单因素实验结果表明
Taq
Mix用量为8~11 μL时扩增效果较佳;加入低浓度Mg
2+
可获得较佳扩增效果;中低浓度模板DNA用量可提高扩增效果;加入少量
Taq
DNA聚合酶可增加扩增结果丰富度。正交实验结果表明各因素对宽叶缬草SRAP-PCR扩增结果的影响程度大小依次为
Taq
Mix用量
>
Taq
DNA聚合酶加入量
>
Mg
2+
加入量
>
模板DNA用量。适于宽叶缬草的最优反应体系为
Taq
Mix 11 μL,模板DNA 30 ng,Mg
2+
0.025 mmol·L
-1
,
Taq
DNA 1.5 U,正向引物与反向引物各5 μmol·L
-1
,用双蒸水补足体系至 20 μL。最优退火温度为36.8 ℃。应用最优体系从88对引物中筛选出17对适用于宽叶缬草SRAP-PCR的条带清晰、多态性较高的有效引物。
结论
2
建立的宽叶缬草SRAP-PCR反应体系稳定性良好,可用于宽叶缬草遗传多样性研究。
Objective
2
To establish the sequence-related amplified polymorphism (SRAP)-polymerase chain reaction (PCR) system for
Valeriana officinalis
var.
latifolia
,so as to lay the theoretical and technical foundations for the breeding of
V. officinalis
var.
latifolia
.
Method
2
Single factor test was applied to investigate the effects of
Taq
Mix dose,Mg
2+
concentration,template DNA concentration,and
Taq
DNA polymerase content on SRAP-PCR amplification of
V. officinalis
var.
latifolia
,based on which the orthogonal experiments were performed to optimize the SRAP-PCR system for
V. officinalis
var.
latifolia
. The effective primers that could be used for genetic diversity studies of
V. officinalis
var.
latifolia
were selected under the optimal reaction condition.
Result
2
The results of the single factor test showed that
Taq
Mix dose within the range of 8-11 μL resulted in better amplification. The addition of a low concentration of Mg
2+
,the medium to low concentrations of template DNA,or the low concentration of
Taq
DNA polymerase enhanced the amplification efficiency or richness. As demonstrated by the orthogonal experiments,the influencing degrees of related factors on SRAP-PCR amplification of
V. officinalis
var.
latifolia
were sorted in a descending order as follows:
Taq
Mix dose
>
Taq
DNA polymerase content
>
Mg
2+
concentration
>
template DNA concentration. The optimal reaction system for
V. officinalis
var.
latifolia
was determined to consist of 11 μL of
Taq
Mix,30 ng of template DNA,0.025 mmol·L
-1
Mg
2+
,1.5 U
of
Taq
DNA polymerase,5 μmol·L
-1
forward primer,and 5 μmol·L
-1
reverse primer,which was supplemented to 20 μL with ddH
2
O. The optimal annealing temperature was 36.8 ℃. A total of 17 pairs of effective primers with high band resolution and polymorphism were selected from 88 primer pairs for SRAP-PCR of
V. officinalis
var.
latifolia
.
Conclusion
2
The established SRAP-PCR system for
V. officinalis
var.
latifolia
is stable, which can be used for genetic diversity studies of
V. officinalis
var.
latifolia
.
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