Title
Chromosomal evolution in the African Arvicanthine rats (Murinae, Rodentia): comparative cytogenetics of Lemniscomys (L-zebra, L-rosalia, L-striatus) and Arvicanthis dembeensis Chromosomal evolution in the African Arvicanthine rats (Murinae, Rodentia): comparative cytogenetics of Lemniscomys (L-zebra, L-rosalia, L-striatus) and Arvicanthis dembeensis
Author
Publication type
article
Publication
Frankfurt ,
Subject
Biology
Source (journal)
Journal of zoological systematics and evolutionary research. - Frankfurt
Volume/pages
40(2002) :4 , p. 223-231
ISSN
0947-5745
ISI
000179746300005
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
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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