Phylogenetic analysis of the mitochondrial cytochrome oxidase subunit I gene of five species of the Culicoides imicola species complex

Y. M. Linton, Anne Jennifer Mordue, R. H. Cruickshank, R. Meiswinkel, P. S. Mellor, John F Dallas

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    Abstract

    The phylogenetic status of members of the Culicoides imicola Kieffer (Diptera: Ceratopogonidae) species complex of haematophagous midges is unknown, and simple means to identify the members using all life stages are unavailable. IN this study, the status of three confirmed (C. imicola s.s., C. bolitinos Meiswinkel and C. loxodontis Meiswinkel) and two provisional (C. tuttifrutti Meiswinkel and C. kwagga Meiswinkel) members of the complex from South Africa was assessed using phylogenetic analysis of partial DNA and amino acid sequences of the mitochondrial cytochrome oxidase subunit I (COI) gene. The four of five individuals of each species analysed contained one or two haplotypes each. Interspecific divergence was significant and characterised by strong A <-> T transversion bias. Phylogenetic trees constructed using neighbour-joining, parsimony and maximum likelihood showed each species to be distinct. Combinations of sites for two restriction enzymes in the COI sequences were species-specific and could form the basis of a diagnostic PCR assay.

    Original languageEnglish
    Pages (from-to)139-146
    Number of pages7
    JournalMedical and Veterinary Entomology
    Volume16
    DOIs
    Publication statusPublished - 2002

    Keywords

    • Culicoides imicola
    • African horse sickness
    • AT transversion bias
    • blue tongue virus
    • cytochrome oxidase
    • mtDNA
    • species complex
    • South Africa
    • SOUTH-AFRICA
    • DNA MARKERS
    • DIPTERA
    • CERATOPOGONIDAE
    • SUBSTITUTION
    • SYSTEMATICS
    • SEQUENCE
    • PRIMERS
    • STATE
    • BIAS

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