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Title
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Chromosomal evolution in the African Arvicanthine rats (Murinae, Rodentia): comparative cytogenetics of Lemniscomys (L-zebra, L-rosalia, L-striatus) and Arvicanthis dembeensis
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Author
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Abstract
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| Chromosome banding analysis (G- and C- bands) of two species of Lemniscomys from Tanzania, Lemniscomys zebra and Lemniscomys rosalia and of a third species from Benin, Lemniscomys striatus was carried out to trace the pattern of chromosomal evolution of the genus. The G- banding pattern comparison makes it possible to identify chromosomal rearrangements between the karyotypes. The two Tanzanian species (L. rosalia 2n = 54, FNa = 62; and L. zebra 2n = 54, FNa = 58) differ due to two pericentric inversions. A X polymorphism was detected in both species. Furthermore, L. rosalia shows two forms of the Y chromosome. The banding pattern of L. striatus (2n = 44; FNa = 68) from Benin allows identification of five Robertsonian fusions with respect to L. zebra. Moreover L. rosalia is characterized by a karyotype which is different from the one described for South Africa (2n = 48; FNa = 62), and therefore it should be considered as a different species. Comparative banding analysis with another Arvicanthine species (Arvicanthis dembeensis, 2n = 62, FNa = 62) showed complete homology in G-bands between the two genera, the differences involving tandem fusions, pericentric inversions, and Robertsonian fusions. |
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Language
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English
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Source (journal)
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Journal of zoological systematics and evolutionary research. - Frankfurt
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Publication
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Frankfurt
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2002
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ISSN
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0947-5745
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DOI
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10.1046/J.1439-0469.2002.00185.X
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Volume/pages
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40
:4
(2002)
, p. 223-231
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ISI
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000179746300005
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Full text (Publisher's DOI)
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