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杉木srap-pcr体系优化

DOI: 10.3969/j.issn.1000-2006.2014.01.003, PP. 15-20

Keywords: 杉木,srap-pcr,体系优化

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Abstract:

为建立杉木srap-pcr反应体系,利用l16(45)正交设计对影响杉木srap-pcr反应体系的mg2+、dntps、引物、taq酶和dna浓度5种因素的4个水平进行优化实验,结合正交直观分析和方差分析,对影响反应较大的mg2+、dntps和引物浓度进行单因素实验,最终确定杉木srap-pcr最佳的反应体系为:在20μl的pcr反应体系中,mg2+浓度为2.25mmol/l、dntps为0.15mmol/l、引物浓度为0.4μmol/l、taq酶为1.5μmol/min、模板dna为60ng,10×pcrbuffer2μl,不足部分用双蒸水补充至20μl。pcr反应程序的两步最适退火温度第1步为35℃,第2步为53℃。利用上述反应体系进行杉木pcr扩增,能得到清晰、稳定的条带。

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