Changes in sperm tail development associated with Y chromosome meiotic drive leading to an excess of males in the medfly Ceratitis capitata (Diptera: Tephritidae)

Pedro A. Rendón, Ronald D. Butler, Roger J. Wood

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The Mediterranean fruit fly Ceratitis capitata (Wied.) normally produces the sexes in equal ratio but strains carrying the Y chromosome meiotic drive MP (male-producing) factor show an excess of males. This is associated with a loss of sperm, and abnormal sperm structure in terms of multiple axonemes, atypical numbers of mitochondrial derivatives, and sometimes an incorrect initial orientation of paracrystalline bodies to the axoneme. Sperms are bundled together within spermatocysts, and those with depleted content and abnormalities occur in the same MP testes as normal spermatocysts. The maximum number of sperms per cyst in control strains was 256, each with a single axoneme originating from a single centriole (kinetosome). The maximum per cyst in MP strains was also 256 but MP cysts contained up to 300 axonemes, providing evidence of multiplication of centrioles. The structural changes in MP sperm are discussed in relation to similar abnormalities reported in the mosquito Aedes aegypti inheriting the Y chromosome meiotic drive haplotype MD. The evolutionary significance of this phenomenon is considered. © 2010 The Linnean Society of London.
    Original languageEnglish
    Pages (from-to)351-359
    Number of pages8
    JournalBiological Journal of the Linnean Society
    Volume101
    Issue number2
    DOIs
    Publication statusPublished - Oct 2010

    Keywords

    • Male-producing factor
    • Mediterranean fruit fly
    • Sex ratio
    • Spermatozoal abnormalities
    • Spermiogenesis

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