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.
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.
Optimization of SRAP-PCR System for Valeriana officinalis var. latifolia and Primer Screening
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
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