A simple and cost-effective method for DNA extraction suitable for PCR in "sucupira branca"

ABSTRACT

"Sucupira branca" is a plant found in the Brazilian Cerrado and is adapted to low fertility soils, and its fruit extract has anti-inflammatory, healing, antiulcerogenic, antimicrobial, cercaricidal, leishmanicidal and antioxidant activities. Furthermore, it provides protection against oxidative stress, is a natural biocontrol agent of Aedes aegypti, has very resistant wood, is a melliferous plant and has been used in reforestation programs. The development of conservation strategies is important for maintaining diversity in natural populations of "sucupira branca" since these populations are in the process of genetic erosion. Molecular biology techniques, which are important for characterizing the genetic diversity of plants to develop conservation strategies, require sufficient high-quality genomic deoxyribonucleic acid (DNA). This study aimed to compare five methods to extract DNA from "sucupira branca". The quality and concentration of DNA were revealed by agarose gel electrophoresis, and only the protocols of Dellaporta, Wood and Hicks et al. (1983) and Khanuja et al. (1999) did not result in satisfactory quantities of DNA. When PCR (Polymerase Chain Reaction) was performed with three inter-simple sequence repeat (ISSR) primers, DNA was successfully amplified from extractions performed with the protocols proposed by Doyle and Doyle (1987), Romano and Brasileiro (1998) and Ferreira and Grattapaglia (1995), which are less expensive than commercial purification kits. These protocols resulted in DNA of sufficient quality and quantity after the amplification reactions were performed.