PCR was set up in 5Opl volume as described by Kambhampati et
a/. (1992) in a thermal cycler (MJ Research; Model PTC-100-60).
The temperature profile for the amplification of the two rRNA gene
fragments was 95°C for 30 s, 40°C for 1 min and 72°C for 1 min for
ten cycles followed by twenty-five cycles of 95°C for 30 s, 50°C for
1 min and 72°C for 1 min. For the amplification of the NADH
dehydrogenase and the COI gene fragments, the temperature
profile was 95°C for 30 s, 45°C for 1 min and 72°C for 1 min for
thirty-five cycles. For both temperature profiles, an initial denatur-
ation step of 95°C for 3 min and a final extension step of 72°C for 7
min were added. After amplification, the products were electro-
phoresed on 1 Yo agarose gels containing 50,d per litre of 10 mglml
ethidium bromide. No contamination was detected in negative
controls