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  • Title: A Multiplex PCR Based on Mitochondrial COI Sequences for Identification of Members of the Anopheles barbirostris Complex (Diptera: Culicidae) in Thailand and Other Countries in the Region.
    Author: Wilai P, Namgay R, Made Ali RS, Saingamsook J, Saeung A, Junkum A, Walton C, Harbach RE, Somboon P.
    Journal: Insects; 2020 Jul 02; 11(7):. PubMed ID: 32630637.
    Abstract:
    A multiplex-PCR assay based on mitochondrial cytochrome c oxidase subunit I (COI) sequences was developed for identification of five members of the Barbirostris Complex which occur in Thailand: Anopheles barbirostris s.s., An. dissidens, An. saeungae, An. wejchoochotei and An. barbirostris species A3. Anopheles campestris was not included in the assay due to the lack of unequivocal sequences. Allele-specific primers were designed for specific nucleotide segments of COI sequences of each species. Mismatch method and addition of long GC tail were applied for some primers. The assay provided products of 706 bp for An. barbirostris s.s., 238 bp for An. dissidens, 611 bp for An. saeungae, 502 bp for An. wejchoochotei and 365 bp for An. barbirostris A3. The assay was tested using 111 wild-caught female mosquitoes from Bhutan, Cambodia, Indonesia (Sulawesi) and Thailand. The results of the multiplex PCR were in complete agreement with COI sequencing; however, one of three specimens from Bhutan and all 11 specimens from Indonesia were not amplifiable by the assay due to their distinct COI sequences. This, together with the distinct rDNA sequences of these specimens, suggests the presence of at least two additional new species in the Barbirostris Complex.
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