Abstract
A protocol is presented for Pinus radiata genomic DNA isolation based on an alkyltrimethyl-ammonium bromide (CTAB) method described for other woody species. The method involves mortar grinding of tissue, a modified CTAB extraction employing high salt concentrations and polyvinyl pyrrolidone, a RNase A treatment and successive isoamyl alco- hol-chloroform extractions. The yield was approximately 15 μg DNA per 100 mg of initial fresh plant material. The genomic DNA obtained by this method was suitable to be used in simple sequence repeat and random-amplified-polymorphic DNA reactions. This extraction method would allow the molecular analysis of shoots from different clones within P. radiata families.
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