Journal
PLANT MOLECULAR BIOLOGY REPORTER
Volume 22, Issue 1, Pages 71-81Publisher
INT SOC PLANT MOLECULAR BIOLOGY
DOI: 10.1007/BF02773351
Keywords
DNA extraction; DNA purification; marker-assisted selection; RAMS; restriction enzyme digestion
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A simple and easy protocol for extracting high-quality DNA from microorganisms and plants is presented. The method involves inactivating proteins by using SDS/proteinase K and precipitating polysaccharides in the presence of high salt. Further purification is based on differential solubility of DNA and high-molecular-weight polysaccharides in aqueous media. The procedure does not use the toxic and potentially hazardous phenol and chloroform, and as many as 100 samples can be processed per day. Absorbency ratios (A(260)/A(280)) of 1.6-2.0 indicated a minimal presence of contaminating metabolites. The DNA was completely digested with 5 restriction enzymes: EcoR 1, Rsa 1, Taq 1, EcoR V, and Hind III. PCR analysis using enterobacterial repetitive intergenic consensus (ERIC) sequence, sequence-characterized amplified region (SCAR), and random amplified microsatellite (RAMS) primers showed the DNA's compatibility with downstream applications. This procedure is applicable to a range of pathogens and plants and thus may find wide application in quarantine services and marker-assisted selection (MAS) breeding.
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