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Spatio-temporal genetic variation of the biting midge vector species Culicoides imicola (Ceratopogonidae) Kieffer in France

Jacquet Stéphanie, Huber Karine, Guis Hélène, Setier-Rio Marie-Laure, Goffredo Maria, Allene Xavier, Rakotoarivony Ignace, Chevillon Christine, Bouyer Jérémy, Baldet Thierry, Balenghien Thomas, Garros Claire. 2016. Spatio-temporal genetic variation of the biting midge vector species Culicoides imicola (Ceratopogonidae) Kieffer in France. Parasites and Vectors, 9 (141), 12 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Quartile : Q1, Sujet : PARASITOLOGY

Abstract : Background Introduction of vector species into new areas represents a main driver for the emergence and worldwide spread of vector-borne diseases. This poses a substantial threat to livestock economies and public health. Culicoides imicola Kieffer, a major vector species of economically important animal viruses, is described with an apparent range expansion in Europe where it has been recorded in south-eastern continental France, its known northern distribution edge. This questioned on further C. imicola population extension and establishment into new territories. Studying the spatio-temporal genetic variation of expanding populations can provide valuable information for the design of reliable models of future spread. Methods Entomological surveys and population genetic approaches were used to assess the spatio-temporal population dynamics of C. imicola in France. Entomological surveys (2–3 consecutive years) were used to evaluate population abundances and local spread in continental France (28 sites in the Var department) and in Corsica (4 sites). We also genotyped at nine microsatellite loci insects from 3 locations in the Var department over 3 years (2008, 2010 and 2012) and from 6 locations in Corsica over 4 years (2002, 2008, 2010 and 2012). Results Entomological surveys confirmed the establishment of C. imicola populations in Var department, but indicated low abundances and no apparent expansion there within the studied period. Higher population abundances were recorded in Corsica. Our genetic data suggested the absence of spatio-temporal genetic changes within each region but a significant increase of the genetic differentiation between Corsican and Var populations through time. The lack of intra-region population structure may result from strong gene flow among populations. We discussed the observed temporal variation between Corsica and Var as being the result of genetic drift following introduction, and/or the genetic characteristics of populations at their range edge. Conclusions Our results suggest that local range expansion of C. imicola in continental France may be slowed by the low population abundances and unsuitable climatic and environmental conditions. (Résumé d'auteur)

Mots-clés Agrovoc : Culicoides, Variation génétique, Distribution géographique, Génétique des populations, Dynamique des populations, Entomologie, Enquête, Vecteur de maladie, Virus des animaux, Surveillance épidémiologique, Microsatellite, Génotype, Structure de la population, Zone méditerranéenne

Mots-clés géographiques Agrovoc : Europe du Sud, Provence-Alpes-Côte d'Azur, France, Corse

Mots-clés complémentaires : Culicoides imicola, Émergence

Classification Agris : L72 - Pests of animals
L20 - Animal ecology
L73 - Animal diseases

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

  • Jacquet Stéphanie, CIRAD-BIOS-UMR CMAEE (FRA)
  • Huber Karine, INRA (FRA)
  • Guis Hélène, CIRAD-BIOS-UMR CMAEE (MDG)
  • Setier-Rio Marie-Laure, EID (FRA)
  • Goffredo Maria, IZSA&M (ITA)
  • Allene Xavier, CIRAD-BIOS-UMR CMAEE (FRA)
  • Rakotoarivony Ignace, CIRAD-BIOS-UMR CMAEE (FRA)
  • Chevillon Christine, IRD (FRA)
  • Bouyer Jérémy, CIRAD-BIOS-UMR CMAEE (ETH) ORCID: 0000-0002-1913-416X
  • Baldet Thierry, CIRAD-BIOS-UMR CMAEE (FRA) ORCID: 0000-0003-2979-9517
  • Balenghien Thomas, CIRAD-BIOS-UMR CMAEE (MAR)
  • Garros Claire, CIRAD-BIOS-UMR CMAEE (FRA) ORCID: 0000-0003-4378-5031

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580087/)

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