Biotechnology Bulletin ›› 2023, Vol. 39 ›› Issue (3): 89-100.doi: 10.13560/j.cnki.biotech.bull.1985.2022-0810

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Development Core SNP Markers for Tobacco Germplasm Genotyping

YU Shi-zhou1(), CAO Ling-gai1, WANG Shi-ze1,2, LIU Yong1,3, BIAN Wen-jie4, REN Xue-liang1()   

  1. 1. Guizhou Academy of Tobacco Science, Guiyang 550081
    2. Hebei Normal University of Science & Technology, Qinhuangdao 066004
    3. Henan Agricultural University, Zhengzhou 450002
    4. China Tobacco Anhui Industrial Co., Ltd., Hefei 230088
  • Received:2022-06-30 Online:2023-03-26 Published:2023-04-10

Abstract:

Based on kompetitive allele specific PCR(KASP)technology platform, the tobacco SNP(single nucleotide polymorphism)markers and corresponding primers were developed and validated,which could assist tobacco germplasm evaluation, genetic diversity analysis, and core germplasm screening. Using Python and Perl tools, 1 179 154 SNPs covering tobacco genome were designed and screened for KASP primers, and their accuracy and applicability were verified by experiment. As results, 217 621 SNPs were enough for designing corresponding KASP primers. Then 1 378 SNPs were selected for experimental validation, and 732 were approved for SNP marker. Further 48 SNP markers, with an average PIC of 0.36 and an average MAF of 0.39, were finally identified as core markers, and they were evenly distributed on 24 chromosomes of the tobacco genome. The various germplasm, especially the genotypes of current major tobacco cultivars could be distinguished by the 48 core SNPs, and the marking is of extremely high reliability.

Key words: tobacco, germplasm, single nucleotide polymorphism, kompetitive allele specific PCR