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Rapid extraction of high‐quality genomic DNA from Porphyra yezoensis (Bangiales, Rhodophyta)

We developed a simple, rapid and stable method for extraction of high molecular weight DNA from the marine red alga Porphyra yezoensis Ueda using both guanidium treatment and QIAGEN™ kit (Funakoshi, Tokyo, Japan). The method does not require expensive equipment and complex steps. The DNA yield averaged 1.5 μg 100 mg−1 of Porphyra tissue and the A260/A280 and A230/A260 ratios of the DNA were approximately 1.8 and 0.4, respectively. It was of sufficient quality to be used for not only polymerase chain reactions but also other DNA manipulation techniques such as restriction digestion and construction of genomic libraries.