Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (1): 61-66.doi: 10.11924/j.issn.1000-6850.casb20200100068

Special Issue: 园艺

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Establishment and Optimization of SSR-PCR Reaction System of Apple Plants

Liu Lin1(), Sun Xiaoshuai2, Li Qian1, Fan Shuchen1, Shi Hongdi1, Ma Jun3, Liu Dandan1()   

  1. 1College of Agriculture, Yunnan University, Kunming 650091
    2College of Science, Tibet University, Lhasa 850000
    3Institute of Horticultural Crops, Yunnan Academy of Agricultural Sciences, Kunming 650091
  • Received:2020-01-20 Revised:2020-03-24 Online:2021-01-05 Published:2020-12-25
  • Contact: Liu Dandan E-mail:xuecangll@163.com;liudandan@ynu.edu.cn

Abstract:

To establish an optimal SSR-PCR system for apple plants, the L16(45) orthogonal test and the annealing temperature gradient experiment were used to analyze the effect of template concentration, primer concentration, Mg2+concentration, dNTPs concentration and Top Taq enzyme concentration in the SSR reaction system on the amplification products. Additionally, the above five factors were screened and optimized at 4 different levels. The results showed that the primer concentration factor had the greatest impact on the SSR-PCR reaction system. Though analysis, the optimal reaction system of 25 μL for SSR-PCR was finally determined to be as follows: 30-60 ng DNA template, 1.2 μL forward and reverse primer (5 μmol/L), 0.5 μL dNTPs (2.5 mmol/L), 0.5 μL Top Taq enzyme (2.5 U/μL) and 2.5 μL 10×Top Taq buffer (containing Mg2+). Finally, optimized reaction system was used for PCR amplification using 21 different apple plants, and the amplification products were about 100-200 bp displaying 2-3 alleles. The optimal SSR-PCR reaction system can provide a preliminary basis for the genetic variation research and molecular identification of genetic relationships in different populations of apple plants.

Key words: apple, SSR-PCR optimal reaction system, orthogonal design experiment, germplasm resource, single factor test

CLC Number: