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Comparative genetic diversity of parasites and their hosts: population structure of an urban cockroach and its haplo-diploid parasite (oxyuroid nematode)

Authors

  • E. Jobet,

    1. Laboratoire de Biologie Animale (UMR 5555 du CNRS), Centre de Biologie et d’Ecologie Tropicale et Méditerranéenne, Université de Perpignan, 66860 Perpignan Cedex, France,
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  • P. Durand,

    1. Laboratoire de Biologie Animale (UMR 5555 du CNRS), Centre de Biologie et d’Ecologie Tropicale et Méditerranéenne, Université de Perpignan, 66860 Perpignan Cedex, France,
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  • J. Langand,

    1. Laboratoire de Biologie Animale (UMR 5555 du CNRS), Centre de Biologie et d’Ecologie Tropicale et Méditerranéenne, Université de Perpignan, 66860 Perpignan Cedex, France,
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  • C. D. M. Müller-Graf,

    1. Laboratoire de Biologie Animale (UMR 5555 du CNRS), Centre de Biologie et d’Ecologie Tropicale et Méditerranéenne, Université de Perpignan, 66860 Perpignan Cedex, France,
    2. Laboratoire d’Ecologie, CNRS-UMR 7625, Pierre et Marie Curie Université, Case 237, 7 quai St. Bernard, 75252 Paris Cedex 05, France,
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  • J.-P. Hugot,

    1. Muséum d’Histoire Naturelle, Mammifères et Oiseaux (FR 1541 CNRS) 55 rue Buffon 75231 Paris Cedex 05, France,
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  • M.-E. Bougnoux,

    1. Laboratoire de Parasitologie-Mycologie, Hôpital Ambroise Paré, 9 avenue Charles-de-Gaulle, 92104 Boulogne-Cedex, France,
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  • C. Rivault,

    1. Laboratoire d’Ethologie (UMR 6552 du CNRS) Université de Rennes 1. Campus de Beaulieu, 35042 Rennes Cedex, France
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  • A. Cloarec,

    1. Laboratoire d’Ethologie (UMR 6552 du CNRS) Université de Rennes 1. Campus de Beaulieu, 35042 Rennes Cedex, France
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  • S. Morand

    Corresponding author
    1. Laboratoire de Biologie Animale (UMR 5555 du CNRS), Centre de Biologie et d’Ecologie Tropicale et Méditerranéenne, Université de Perpignan, 66860 Perpignan Cedex, France,
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Dr Serge Morand. Fax: +33 (0)4 68 66 22 86; E-mail: morand@univ-perp.fr

Abstract

Few studies have investigated the genetic structure of both host and parasite populations at a level of populations and at a level of individuals. We investigated the genetic structure of the urban cockroach Blattella germanica and its oxyuroid parasite Blatticola blattae. Random amplified polymorphic DNA (RAPD) markers were used to quantify genetic diversity between and within four populations (from two cities in France) of the host and its parasite. Diversity based on phenotypic frequencies was calculated for each RAPD marker using Shannon-Wiener’s index. We used multivariate analyses to test the significance of genetic differentiation between host and parasite populations. Analysis of molecular variance was also used. Both methods gave similar results. Diversity between pairs of individuals was estimated by Nei & Li’s index. Genetic diversity was higher within host or parasite populations (80% and 82%, respectively, of explained diversity) than between host or parasite populations (20% and 18%, respectively, explained diversity). The genetic distances between pairs of parasite populations (or individuals) were not correlated with the genetic distances between the corresponding pairs of host populations (or individuals).

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