A simple and rapid DNA extraction method from leaves of grapevine suitable for polymerase chain reaction analysis.

The genomic grapevine (Vitis vinifera L.) DNA extraction is difficult because of secondary metabolites that interfere with DNA isolation procedures and subsequent applications. We developed a simple, rapid and efficient method for the extraction of genomic DNA from asymptomatic and pathogen-infected grape leaves. The protocol reported, based on a modified cetyl trimethylammonium bromide (CTAB) extraction procedure, allowed the rapid DNA extraction from little amounts of leaf material without employment of liquid nitrogen for initial tissue grinding. The protocol included polyvinylpyrrolidone (PVP) to bind phenolic compounds, β-mercaptoethanol to inhibit the oxidation of polyphenols, and a h…