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A remarkable autosomal heteromorphism in Pseudoryzomys simplex...

AutorInnen: 
Moreira, C. N., Di-Nizo, C. B., Silva, M. J. J., Yonenaga-Yassuda, Y., Ventura, K.
Erscheinungsjahr: 
2013
Vollständiger Titel: 
A remarkable autosomal heteromorphism in Pseudoryzomys simplex 2n = 56, FN = 54-55 (Rodentia, Sigmodontinae)
ZFMK-Autorinnen / ZFMK-Autoren: 
Org. Einordnung: 
Publiziert in: 
Genetics and Molecular Biology
Publikationstyp: 
Zeitschriftenaufsatz
DOI Name: 
10.1590/S1415-47572013000200010
Keywords: 
cytogenetics; fluorescent in situ hybridization; heterochromatin; Oryzomyini
Bibliographische Angaben: 
Moreira, C. N., Di-Nizo, C. B., Silva, M. J. J., Yonenaga-Yassuda, Y., Ventura, K. (2013): A remarkable autosomal heteromorphism in Pseudoryzomys simplex 2n = 56, FN = 54-55 (Rodentia, Sigmodontinae). - Genetics and Molecular Biology 36 (2): 201-206.
Abstract: 

Pseudoryzomys simplex, the false rice rat, is a monotypic genus of the Oryzomyini tribe (Sigmodontinae) distributed in part of Bolivia, Paraguay, Argentina and Brazil. Its diploid number has been described as 56 acrocentric chromosomes decreasing in size and no karyotype figure has been depicted. Herein, we present karyotypic data on P. simplex, including chromosome banding and molecular fluorescent in situ hybridization using telomeric sequences and the whole X-chromosome of its sister clade Holochilus brasiliensis (HBR) as probes. A case of remarkable autosomal heteromorphism due to the presence of a whole heterochromatic arm leading to the variability of FN is reported, as well as the occurrence of regions of homology between the X and Y chromosomes (pseudoautosomal regions) after chromosome painting with the HBR X probe on P. simplex metaphases.

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