Effect of 11-year storage of GMO reference material at ultra-low temperature on nucleic acid detection of standard matrix sample of transgenic crop
WANG Wei-Xia,, LAI Feng-Xiang, HU Hai-Yan, HE Jia-Chun, WEI Qi, WAN Pin-Jun, FU Qiang,*China National Rice Research Institute, Hangzhou 310006, Zhejiang, China
Rice Pest Management Research Group of the Agricultural Science and Technology Innovation Program of China Academy of Agricultural Science(CAAS-ASTIP-2016-CNRRI) Fundamental Research Funds for Central Public Welfare Research Institute(2017RG005)
Abstract Reference material is indispensable for the reliability, comparability, and accuracy of transgenic detection results. In this paper, the effects of long-term preservation of matrix reference materials on PCR detection and the stability of low content reference materials were studied. The reproducibility and quantity stability of transgenic reference materials and transgenic samples with different contents were detected by three methods (common qualitative PCR, real-time fluorescent PCR, and droplet digital PCR). The result showed that the transgenic reference material with 0.1% GM content could still be clearly amplified after 9 years of storage, and the Ct value was about 36. The digital PCR revealed that the quantity of GM matrix reference materials remained stable for long storage time. There was no effect on the detection of transgenic elements in sample mixed with soybean, corn and rice powder which stored at -70 to -75℃ for 11 years. In summary, the long-term storage of GM matrix reference materials at low temperature would not affect the detection of each transgenic component and its application as a positive control for transgenic nucleic acid detection. Keywords:genetically modified organism (GMO);matrix reference material;detection of transgenic plants;reference material storage
PDF (6266KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 王渭霞, 赖凤香, 胡海燕, 何佳春, 魏琪, 万品俊, 傅强. 超低温11年保存期对转基因作物基体标准样品核酸检测的影响. 作物学报, 2022, 48(1): 238-248 DOI:10.3724/SP.J.1006.2022.12001 WANG Wei-Xia, LAI Feng-Xiang, HU Hai-Yan, HE Jia-Chun, WEI Qi, WAN Pin-Jun, FU Qiang. Effect of 11-year storage of GMO reference material at ultra-low temperature on nucleic acid detection of standard matrix sample of transgenic crop. Acta Agronomica Sinica, 2022, 48(1): 238-248 DOI:10.3724/SP.J.1006.2022.12001
Table 1 表1 表1留存的参加能力证的混合作物样品的转基因参数信息和推荐用标准 Table 1Information of transgenic detection parameters and recommended standards of the retained mixed crop samples
样品编号 Sample ID
起存时间 Start date
存期 Storage
阳性转基因元件及检测参考标准 Positive transgenic elements and references
M: Trans2K plus DNA ladder; 1~13: 为利用植物基因组DNA提取试剂盒提取的DNA, 各泳道相应样品编号见表3。上样量4.0 μL。 Fig. 1Agarose gel electrophoresis of genomic DNA from a single crop reference material
M: Trans2K plus DNA ladder; Lanes 1-13 are the corresponding DNA sample number shown in Table 3. Loading amount was 4.0 μL.
测试样品为低温保存9年的转基因含量0.1%的基体标准物质; M: 100 bp DNA ladder; 1~6: 转基因含量0.1%的标准物质; 7~9: 转基因含量1.0%的阳性对照; 10~12: 非转基因混合物; 13~15: 样品DNA提取空白对照; 16~18: PCR空白水对照。 Fig. 2Electrophoretic image of GMO reference material with content 0.1% detected by event-specific qualitative PCR
The events with 0.1% content were matrix reference materials stored nine years at low temperature; M: 100 bp DNA ladder; 1-6: GMO reference material with 0.1% content; 7-9: positive control with content 1.0% (w/w); 10-12: non-transgenic negative control; 13-15: blank control; 16-18: PCR blank H2O control.
测试样品为低温保存9年的转基因含量0.1%的基体标准物质; CK+: 转基因含量1.0%的阳性对照。 Fig. 3Amplification curves of GMO reference material with GM content 0.1% detected by qRT-PCR
The events with 0.1% content were matrix reference materials stored nine years at low temperature; CK+: positive control with content 1.0% (w/w).
Table 2 表2 表2转化体实时荧光PCR对保存9年的转基因含量0.1%的标准物质的检测 Table 2Detection of reference materials with GM content 0.1% stored for nine years by event-specific qRT-PCR
M: 100 bp DNA ladder; 1~3: 样品S7; 4~6: 样品S8; 7~9: 转基因含量1.0%的阳性对照; 10~12: 非转基因阴性对照; 13~15: 样品DNA提取空白对照; 16~18: PCR空白水对照; S7和S8为2014年留存的能力验证样品, 存期6年。 Fig. 4Qualitative PCR detection of transgenic components in S7 and S8 samples stored for six years
M: 100 bp DNA ladder; 1-3: sample S7; 4-6: sample S8; 7-9: positive control with GM content 1.0% (w/w); 10-12: non-transgenic negative control; 13-15: extract blank control; 16-18: blank H2O control; S7 and S8 are the capability verification samples retained in 2014 with a shelf life of six years.
M: 100 bp DNA ladder; 1~3: 样品S9; 4~6: 样品S10; 7~9: 转基因含量1.0%的阳性对照; 10~12: 非转基因阴性对照; 13~15: 样品DNA提取空白对照; 16~18: PCR空白水对照; S9和S10为2009年留存的能力验证样品, 存期11年。 Fig. 5Qualitative PCR detection of transgenic components in S9 and S10 samples stored for 11 year
M: 100 bp DNA ladder; 1-3: sample S9; 4-6: sample S10; 7-9: positive control with GM content 1.0% (w/w); 10-12: non-transgenic negative control; 13-15: extract blank control; 16-18: PCR blank H2O control; S9 and S10 are the capability verification samples retained in 2009 with a shelf life of 11 years.
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