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International Journal of Tropical Insect Science

, Volume 28, Issue 3, pp 168–177 | Cite as

Genetic differentiation in sympatric populations of the groundnut seed beetle Caryedon serratus (Coleoptera: Chrysomelidae): new insights from molecular and ecological data

  • M. SembèeneEmail author
  • J.-Y. Rasplus
  • J.-F. Silvain
  • A. Delobel
Article

Abstract

The extent of genetic differentiation between native and groundnut-feeding forms of the groundnut seed beetle Caryedon serratus Olivier was studied. Sixteen samples (560 individuals of both sexes collected in four localities in Senegal) of C. serratus were reared from pods of four distinct host plants (Arachis hypogaea L., Bauhinia rufescens Lam., Piliostigma reticulatum (DC) Hochst and Tamarindus indica L.), and five microsatellite loci were analysed. Phylogenetic and statistical analyses indicated that host plants strongly influence the degree of genetic differentiation between sampled individuals. Within host plants, genetic differentiation was low. Genetic differentiation between hosts was highly significant (average θ = 0.374) and geographical distances between localities did not influence the genetic structuration of C. serratus populations from a given host plant. The results of this study show that C. serratus could be under a host race formation process.

Key words

Caryedon serratus microsatellites genetic differentiation groundnut host plants Senegal 

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Copyright information

© ICIPE 2008

Authors and Affiliations

  • M. Sembèene
    • 1
    Email author
  • J.-Y. Rasplus
    • 2
  • J.-F. Silvain
    • 3
  • A. Delobel
    • 4
  1. 1.Département de Biologie AnimaleFaculté des Sciences et TechniquesDakarSenegal
  2. 2.INRA-UMR 1062 CBGP (INRA/IRD/Cirad/Montpellier SupAgro)Montferrier-sur-LezFrance
  3. 3.Laboratoire EvolutionIRD-UR R72Gif-sur-YvetteFrance
  4. 4.Fontenay-aux-RosesFrance

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