Comparison of different extraction methods of genomic DNA of raw soybean milk.

[Objective] The paper was too explore and compare methods of DNA extraction from raw soybean milk.[Method] Taken the soybean milk purchased from market as the material,pyrolysis method,isopropanol precipitation method,CTAB method,SDS method,high-salt low-pH and guanidine isothiocyanate method,as well as their improved methods were used to extract genomic DNA,and the extraction effects of these methods were compared by detecting the DNA using optical density,agarosegel electrophoresis and polymerase chain reaction(PCR)methods.[Result] The genomic DNA extracted by all methods except isopropanol precipitation method could be used in PCR reaction.Meanwhile,the high DNA concentration and purity will be gained by different methods in the order of high-salt low-pH method,high-salt low-pH method,improved CTAB method,improved isopropanol precipitation method,guanidine isothiocyanate method and improved pyrolysis method.[Conclusion] These methods are simply to operate,fast to gain results,and suitable for the extraction of total DNA from raw soybean milk.