NDLI: Robertsonian polymorphism, B chromosomes variation and sex chromosomes heteromorphism in the African water rat Dasymys (Rodentia, Muridae)

Content Provider	Springer Nature Link
Author	Volobouev, V. T. Sicard, B. Aniskin, V. M. Gautun, J. C. Granjon, L.
Copyright Year	2000
Abstract	Chromosome banding analysis (G- and C-bands) of Dasymys rufulus from Senegal, Mali and the Ivory Coast, and D. cf. incomtus from Eastern and South-western Ethiopia was carried out. The diploid numbers (2N) in the former species range between 36 and 39 due to the presence of 0–3 small biarmed heterochromatic B chromosomes, resulting in a corresponding variation of the number of autosomal arms (NFa) between 44 and 50. The basic autosomal set was, however, constant and identical in these specimens. The karyotypes of D. cf. incomtus from Eastern and Western Ethiopia were found to be different (2N=40 and 38, respectively). Comparison of G-banding patterns of the species studied revealed that they differ from each others by 1–2 Rb fusions/fissions, one paracentric inversion and heteromorphous sex chromosomes resulting from addition/deletion of heterochromatic blocks (X) and pericentric inversion (Y). In the light of the available chromosome banding data, the significance of intraspecies karyotypic variability within D. cf. incomtus and its relevance to the systematics of the genus are discussed.
Starting Page	689
Ending Page	697
Page Count	9
File Format	PDF
ISSN	09673849
Journal	Chromosome Research
Volume Number	8
Issue Number	8
e-ISSN	15736849
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2000-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Human Genetics Plant Genetics & Genomics Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics

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