Article (Scientific journals)
Scent of a break-up: Phylogeography and reproductive trait divergences in the red-tailed bumblebee (Bombus lapidarius)
Lecocq, T.; Dellicour, S.; Michez, D. et al.
2013In BMC Evolutionary Biology, 13 (1)
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Keywords :
Bumblebees; Genetic differentiation; Phylogeography; Reproductive traits
Abstract :
[en] Background: The Pleistocene climatic oscillations are considered as a major driving force of intraspecific divergence and speciation. During Ice Ages, populations isolated in allopatric glacial refugia can experience differentiation in reproductive traits through divergence in selection regimes. This phenomenon may lead to reproductive isolation and dramatically accentuates the consequences of the climatic oscillations on species. Alternatively, when reproductive isolation is incomplete and populations are expanding again, further mating between the formerly isolated populations can result in the formation of a hybrid zone, genetic introgression or reinforcement speciation through reproductive trait displacements. Therefore changes in reproductive traits driven by population movements during climatic oscillations can act as an important force in promoting pre-zygotic isolation. Notwithstanding, divergence of reproductive traits has not been approached in the context of climatic oscillations. Here we investigate the impact of population movements driven by climatic oscillations on a reproductive trait of a bumblebee species (Bombus lapidarius). We characterise the pattern of variation and differentiation across the species distribution (i) with five genes (nuclear and mitochondrial), and (ii) in the chemical composition of male marking secretions (MMS), a key trait for mate attraction in bumblebees. Results: Our results provide evidence that populations have experienced a genetic allopatric differentiation, in at least three main refugia (the Balkans, Centre-Eastern Europe, and Southern Italy) during Quaternary glaciations. The comparative chemical analyses show that populations from the Southern Italian refugium have experienced MMS differentiation and an incipient speciation process from another refugium. The meeting of Southern Italian populations with other populations as a result of range expansion at a secondary contact zone seems to have led to a reinforcement process on local MMS patterns. Conclusions: This study suggests that population movement during Quaternary climatic oscillations can lead to divergence in reproductive traits by allopatric differentiation during Ice Ages and by reinforcement during post-glacial recolonization. © 2013 Lecocq et al.; licensee BioMed Central Ltd.
Disciplines :
Biochemistry, biophysics & molecular biology
Genetics & genetic processes
Environmental sciences & ecology
Entomology & pest control
Author, co-author :
Lecocq, T.;  Laboratoire de Zoologie, Research Institute of Biosciences, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
Dellicour, S.;  Evolutionary Biology and Ecology, Université Libre de Bruxelles, Avenue FD Roosevelt 50, B-1050 Brussels, Belgium
Michez, D.;  Laboratoire de Zoologie, Research Institute of Biosciences, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
Lhomme, P.;  Laboratoire de Zoologie, Research Institute of Biosciences, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
Vanderplanck, Maryse ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Analyse, qual. et risques - Labo. de Chimie analytique
Valterová, I.;  Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flamingovo nam 2, CZ-166 10 Prague, Czech Republic
Rasplus, J.-Y.;  Institut National de la Recherche Agronomique, UMR 1062, Centre de Biologie Pour la Gestion des Populations, F-34988 Montferrier/Lez cedex, France
Rasmont, P.;  Laboratoire de Zoologie, Research Institute of Biosciences, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
Language :
English
Title :
Scent of a break-up: Phylogeography and reproductive trait divergences in the red-tailed bumblebee (Bombus lapidarius)
Publication date :
2013
Journal title :
BMC Evolutionary Biology
eISSN :
1471-2148
Publisher :
BioMed Central
Volume :
13
Issue :
1
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 January 2017

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