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Establishment and Optimization of ISSR-PCR Reaction System of Machilus thunbergii

  • Received Date: 2010-05-19
  • In order to establish stable ISSR-PCR reaction system of Machilus thunbergii, single factor and orthogonal experiment design were used to optimize the reaction system after exploring M. thunbergii DNA extraction. For finding optimal concentration of factors of ISSR-PCR, the different levels of concentration of Mg2+, primer, template DNA, dNTPs were trailed by single factor experiment. Meanwhile, in order to improve the reliability of the results of the single-factor test, the authors also adopted orthogonal design by four factors, three levels for further optimizing and screening the best conditions of Mg2+, primer, template DNA, and dNTPs. The best ISSR-PCR reaction system of M. thunbergii was eventually established by comparing the two method’s results, which included 20 μL reaction system, Taq enzyme, 0.05 U·μL-1,Mg2+ 2.0 mmol·L-1 template DNA 1 ng·L-1,dNTPs 0.3 mmol·L-1,primers(835) 0.5 μmol·L-1, and 1×PCR buffer. The establishment of the better repeatability and stability ISSR-PCR reaction system could provide technical support for further research of genetic structure and genetic variety of M. thunbergii group.
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Establishment and Optimization of ISSR-PCR Reaction System of Machilus thunbergii

  • 1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China
  • 2. Paulownia Research and Development Center, State Forestry Administration, Zhengzhou 450003, He’nan, China

Abstract: In order to establish stable ISSR-PCR reaction system of Machilus thunbergii, single factor and orthogonal experiment design were used to optimize the reaction system after exploring M. thunbergii DNA extraction. For finding optimal concentration of factors of ISSR-PCR, the different levels of concentration of Mg2+, primer, template DNA, dNTPs were trailed by single factor experiment. Meanwhile, in order to improve the reliability of the results of the single-factor test, the authors also adopted orthogonal design by four factors, three levels for further optimizing and screening the best conditions of Mg2+, primer, template DNA, and dNTPs. The best ISSR-PCR reaction system of M. thunbergii was eventually established by comparing the two method’s results, which included 20 μL reaction system, Taq enzyme, 0.05 U·μL-1,Mg2+ 2.0 mmol·L-1 template DNA 1 ng·L-1,dNTPs 0.3 mmol·L-1,primers(835) 0.5 μmol·L-1, and 1×PCR buffer. The establishment of the better repeatability and stability ISSR-PCR reaction system could provide technical support for further research of genetic structure and genetic variety of M. thunbergii group.

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