Chromosomal evidence for a polytypic structure of Arvicanthis niloticus (Rodentia, Muridae) |
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| Authors: | V Volobouev E Viegas-Páquignot M Lombard F Petter J M Duplantier B Dutrillaux |
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| Institution: | Génétique écologique EPHE, UniversitéMontpellier-2, Montpellier, France;C. N. R. S. Structure et Mutagenèse Chromosomiques, Institut Curie, Paris, France;Museum d'Histoire Naturelle de Paris, Paris, France. -;ORSTOM, Dakar, Senegal |
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| Abstract: | The analysis of R- and C-banding patterns of chromosomes of Arvicanthis niloticus from five localities of Africa (Egypt, Senegal, Burkina-Faso, Mali and Central African Republic) revealed the existence of three karyotypic forms labelled in the study as ANI-1, ANI-2 and ANI-3. These forms differ from each other by 6 to 8 chromosomal rearrangements such as reciprocal and Robertsonian translocations and pericentric inversions. Moreover, they possess different quantities of C-heterochromatin. The data indicate that these three forms are distinct species, cytogenetically isolated, and that a further taxonomic analysis of the genus Arvicanthis is needed. |
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| Keywords: | Chromosomal evolution hylogenetic relationships Arvicanthis Polytypicstructure |
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