Evaluation of economical and rapid method of plant DNA extraction for PCR analysis of different crops

Abstract

In the recent genomic era, polymerase chain reaction (PCR) has become a basic tool in molecular studies and the success of PCR depends upon the template DNA. PCR technique is quite robust and often unnecessary to extract high quality of DNA and hence crude DNA can be used as template for amplification. Therefore, we have evaluated NaOH-Tris DNA extraction method for PCR analysis because this is very simple, time saving and safe without the need to use expensive or rare materials and laboratory apparatus. This method only requires a small amount of leaf tissue, NaOH, Tris, micro tube and plastic pestle. The amplified PCR products showed clear, sharp and uniform bands gave similar results as compared with the modified CTAB method. The DNA obtained is crude contains impurities like protein, RNA but these impurities did not affect PCR amplification. This DNA extraction method is evaluated for brinjal (Solanummelongena L.), chilli (Capsicum annuum L.), rice (Oryza sativa L.) and tomato (Solanumlycopersicum L.) crop. Many other crop plants could also be amplified using the same DNA extraction method for molecular analysis of large samples. Thus, the use of NaOH-Tris method will allow researchers to obtain DNA from plant quickly for use in molecular studies.