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Voordouw, Maarten

Nom
Voordouw, Maarten
Affiliation principale
Fonction
Ancien.ne collaborteur.trice
Identifiants
https://libra.unine.ch/handle/123456789/375
_
0000-0001-9384-0436

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  • Publication
    Accès libre
    Genetic variation in the primary sex ratio in populations of the intertidal copepod, Tigriopus californicus, is widespread on Vancouver Island
    (2008)
    Voordouw, Maarten 
    ;
    Stebbins, Gabe
    ;
    Robinson, H. Eve
    ;
    Perrot-Minnot, Marie-Jeanne
    ;
    Rigaud, Thierry
    ;
    Anholt, Bradley R
    Hypothesis: Genetic variation for the primary sex ratio is widespread in a copepodwith polygenic sex determination. Cytoplasmic sex ratio distorters (e.g. Wolbachia andmicrosporidians) influence the primary sex ratio in this copepod.
    Organism: The intertidal copepod, Tigriopus californicus; six populations from VancouverIsland, British Columbia.
    Study site: Quantitative genetics experiment in the laboratory. PCR and antibioticsexperiment to test for the presence of cytoplasmic sex ratio distorters.
    Results: Genetic variation for the primary sex ratio was found in five of the six populationssurveyed. The primary sex ratio was paternally transmitted. There was no evidence thatWolbachia or microsporidians influenced the primary sex ratio of T. californicus.
  • Publication
    Accès libre
    Paternal inheritance of the primary sex ratio in a copepod
    (2005)
    Voordouw, Maarten 
    ;
    Robinson, H. Eve
    ;
    Anholt, Bradley R.
    Uniparentally inherited genetic elements are under strong selection to manipulate sex determination in their host and shift the host sex ratio towards the transmitting sex. For any sex-ratio trait, lineage analysis and quantitative genetics are important tools for characterizing the mode of inheritance (biparental vs. maternal vs. paternal) thereby narrowing the field of possible sex-determining mechanisms (e.g. polygenic, sex chromosomes with meiotic drive, cytoplasmic microorganisms). The primary sex ratio of the harpacticoid copepod, Tigriopus californicus is often male-biased and is highly variable among full sib families. We found that this extra-binomial variation for the primary sex ratio is paternally but not maternally transmitted in T. californicus. Paternal transmission of the primary sex ratio has been well documented in the haplo–diploid hymenoptera but is relatively rare in diplo–diploid organisms. If the sex-ratio trait is paternally transmitted in other closely related harpacticoid copepods it would explain why male biased primary sex ratios are so common in this group.