High molecular weight DNA was isolated from all the samples. The
yield of genomic DNA isolated from the different samples of turmeric powder and their adulterants, C. zedoaria and C. malabarica ranged
from 48.0 μg g−1 to 62.2 μg g−1 of dried tissue. An absorbance
(A260/A280) ratio of 1.7–1.8 indicated insignificant levels of contaminating
proteins and polysaccharides in the DNA