Extraction of genomic DNA
Genomic DNA (gDNA) was extracted using a phenol/chloroform
extraction method. Adults of each insect species were individually
ground in 400 μl of cold extraction buffer (10 mM Tris, pH 8.0, 0.1 M
EDTA, 20 μg/ml RNase and 0.5% SDS). The ground sample was
incubated at 50 °C for 10 min with 5 μl of proteinase K (20 mg/ml).
To remove macromolecules other than nucleic acids, a mixture of
phenol (pH 8.0) and chloroform (1:1, v/v) was added in a volume
equal to the bground?N sample. The mixture was then centrifuged at