Detection of knockdown resistance mutations in Anopheles sacharovi (Diptera: Culicidae) and genetic distance with Anopheles gambiae (Diptera: Culicidae) using cDNA sequencing of the voltage-gated sodium channel gene.
The knockdown resistance (kdr) mutation in the voltage-gated sodium channel gene (VGSCG), an important resistance mechanism against pyrethroids, was studied in Anopheles sacharovi Favre. It was found that the specific primers Agd1 and Agd2 used for polymerase chain reaction (PCR) amplification of Anopheles gambiae Giles VGSCG also amplified this genomic region in An. sacharovi. Comparison of the IIs4-IIs6 domain segments of the gene indicated 70% nucleotides common to both species and a genetic distance of 0.255 between them. Four different samples of pyrethroid-resistant An. sacharovi produced three types of amino acid, serine (TCG),leucine (TTG),and phenylalanine (TTT) at the kdr mutation point, whereas only two kdr mutations, leucine to phenylalanine and leucine to serine, occur in An. gambiae.
Lüleyap
H Umit
HU
University of Cukurova, Faculty of Medicine, Department of Medical Biology and Genetics, 01330 Adana, Turkey. ululeyap@mail.cu.edu.tr
Alptekin
Davut
D
Kasap
Halil
H
Kasap
Mulkiye
M
D000818:Animals; D000852:Anopheles / Q000145:classification / Q000235:genetics* / Q000502:physiology; D001483:Base Sequence; D017931:DNA Primers; D018076:DNA, Complementary; D007113:Immunity, Innate; D008969:Molecular Sequence Data; D009154:Mutation; D016133:Polymerase Chain Reaction; D015222:Sodium Channels / Q000235:genetics*
D017931:DNA Primers; D018076:DNA, Complementary; D015222:Sodium Channels