Extensive Robertsonian polymorphism in the African rodent Gerbillus nigeriae : geographic aspects and meiotic data
2011; Wiley; Volume: 284; Issue: 4 Linguagem: Inglês
10.1111/j.1469-7998.2011.00803.x
ISSN1469-7998
AutoresKarmadine Hima, M. Thiam, Josette Catalan, Philippe Gauthier, Jean‐Marc Duplantier, Sylvain Piry, Mbacké Sembène, Janice Britton‐Davidian, Laurent Granjon, Gauthier Dobigny,
Tópico(s)Genomics and Phylogenetic Studies
ResumoJournal of ZoologyVolume 284, Issue 4 p. 276-285 Extensive Robertsonian polymorphism in the African rodent Gerbillus nigeriae: geographic aspects and meiotic data K. Hima, K. Hima Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, France Centre Régional Agrhymet, Rive Droite, Niamey, Niger *Contributed equally.Search for more papers by this authorM. Thiam, M. Thiam Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, France Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus ISRA-IRD de Bel-Air, Dakar, Sénégal *Contributed equally.Search for more papers by this authorJ. Catalan, J. Catalan Laboratoire Génétique et Environnement, Institut des Sciences de l'Evolution de Montpellier (UMR CNRS-UM2), Université de Montpellier II, Montpellier, FranceSearch for more papers by this authorP. Gauthier, P. Gauthier Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, FranceSearch for more papers by this authorJ. M. Duplantier, J. M. Duplantier Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, FranceSearch for more papers by this authorS. Piry, S. Piry Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, FranceSearch for more papers by this authorM. Sembène, M. Sembène Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus ISRA-IRD de Bel-Air, Dakar, SénégalSearch for more papers by this authorJ. Britton-Davidian, J. Britton-Davidian Laboratoire Génétique et Environnement, Institut des Sciences de l'Evolution de Montpellier (UMR CNRS-UM2), Université de Montpellier II, Montpellier, FranceSearch for more papers by this authorL. Granjon, L. Granjon Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, France Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus ISRA-IRD de Bel-Air, Dakar, SénégalSearch for more papers by this authorG. Dobigny, G. Dobigny Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, France Centre Régional Agrhymet, Rive Droite, Niamey, NigerSearch for more papers by this author K. Hima, K. Hima Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, France Centre Régional Agrhymet, Rive Droite, Niamey, Niger *Contributed equally.Search for more papers by this authorM. Thiam, M. Thiam Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, France Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus ISRA-IRD de Bel-Air, Dakar, Sénégal *Contributed equally.Search for more papers by this authorJ. Catalan, J. Catalan Laboratoire Génétique et Environnement, Institut des Sciences de l'Evolution de Montpellier (UMR CNRS-UM2), Université de Montpellier II, Montpellier, FranceSearch for more papers by this authorP. Gauthier, P. Gauthier Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, FranceSearch for more papers by this authorJ. M. Duplantier, J. M. Duplantier Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, FranceSearch for more papers by this authorS. Piry, S. Piry Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, FranceSearch for more papers by this authorM. Sembène, M. Sembène Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus ISRA-IRD de Bel-Air, Dakar, SénégalSearch for more papers by this authorJ. Britton-Davidian, J. Britton-Davidian Laboratoire Génétique et Environnement, Institut des Sciences de l'Evolution de Montpellier (UMR CNRS-UM2), Université de Montpellier II, Montpellier, FranceSearch for more papers by this authorL. Granjon, L. Granjon Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, France Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus ISRA-IRD de Bel-Air, Dakar, SénégalSearch for more papers by this authorG. Dobigny, G. Dobigny Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, Montferrier-sur-Lez, France Centre Régional Agrhymet, Rive Droite, Niamey, NigerSearch for more papers by this author First published: 09 March 2011 https://doi.org/10.1111/j.1469-7998.2011.00803.xCitations: 7 Correspondence Dobigny Gauthier, Centre de Biologie pour la Gestion des Populations (UMR IRD-INRA-CIRAD-Montpellier SupAgro), Campus International de Baillarguet, 34988 Montferrier-sur-Lez, France. Tel: 227 +20 31 50 54Email: gauthier.dobigny@ird.fr Editor: Jean-Nicolas Volff Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Robertsonian (Rb) fusions are one of the most frequent types of chromosomal rearrangements and have greatly contributed to the evolution of mammalian genome architecture. Apart from rare exceptions, investigations at the species level (i.e. polymorphism) are almost exclusively restricted to two mammalian models, namely the house mouse Mus musculus domesticus (2n=22–40) and the common shrew Sorex araneus (2n=20–33). Yet, these two species display important but usually locally restricted Rb polymorphisms. Another rodent species, Gerbillus nigeriae, has also been shown to display a wide range of diploid number variation (2n=60–74) due to Rb polymorphism. However, data about the latter species are rather scarce. We provide here a survey including recapitulation of 137 available karyotypic data that were implemented with 241 new records, thus allowing us to draw the first map of 2n variation throughout the species range. First, truly segregating centric fusions are observed in almost all localities investigated. Moreover, the geographic patterns (from 79 West African localities in total) show that local 2n variations are clearly lower than those observed at a wider scale, thus leading to some spatial structuring that may reflect phylogeographic assemblages. The meiotic study of 13 male specimens allowed us to identify several instances of double and triple Rb heterozygous individuals, and strongly suggested that heterozygosity is more the rule than the exception in the species. From there, it is tempting to speculate that the extraordinary Rb plasticity observed in G. nigeriae may be selectively maintained and confer adaptability to this species, which inhabits unstable Sahelian environments, where it is able to colonize efficiently habitats that undergo rapid human-mediated and/or climatic changes. Citing Literature Volume284, Issue4August 2011Pages 276-285 RelatedInformation
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