Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/14996
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dc.contributor.authorEler, Eduardo Schmidt-
dc.contributor.authorSilva, Maria Nazareth Fda-
dc.contributor.authorSilva, Carlos E.F.-
dc.contributor.authorFeldberg, Eliana-
dc.date.accessioned2020-05-07T14:00:25Z-
dc.date.available2020-05-07T14:00:25Z-
dc.date.issued2012-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/14996-
dc.description.abstractWe made a comparative analysis of the cytogenetics of spiny rat species of the genus Proechimys collected from several sites of the Madeira River basin (Amazonas State, Brazil) and Jari River valley (Pará State, Brazil). Individuals were assigned to three groups based on diploid and fundamental numbers: 2n=28, FN=46 (P. cuvieri and P. gr. longicaudatus); 2n=38, FN=52 (Proechimys gr. guyannensis), and 2n=40, FN=54 (P. gardneri). The nucleolar organizer region (NOR) was interstitial on the long arm of one submetacentric pair, as seen in all species of Proechimys analyzed thus far. However, its position in the karyotype was variable. A duplication of the NOR in one of the homologues was detected in P. gr. longicaudatus from the Aripuanã basin along the mid Madeira. The C-band pattern varied between species and, together with the NOR, allowed the identification of two evolutionary units in P. gr. longicaudatus in the region of the mid Madeira River (cytotypes A and B). The morphology and banding of the sex chromosomes were species specific. A range extension is suggested for the geographic distribution of P. gardneri and P. gr. longicaudatus. Moreover, we suggest that species of Proechimys with 2n=38 chromosomes are restricted to east of the Negro River and north of the Amazon River. We also revised the published chromosome data available for Proechimys. © FUNPEC-RP.en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 11, Número 2, Pags. 830-846pt_BR
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/br/*
dc.subjectChromosome Analysisen
dc.subjectChromosome Armen
dc.subjectChromosome Banden
dc.subjectChromosome Noren
dc.subjectControlled Studyen
dc.subjectCytogeneticsen
dc.subjectCytotypeen
dc.subjectDiploidyen
dc.subjectFemaleen
dc.subjectGenetic Conservationen
dc.subjectGenusen
dc.subjectGeographic Distributionen
dc.subjectKaryotypingen
dc.subjectMaleen
dc.subjectNonhumanen
dc.subjectRaten
dc.subjectRiver Basinen
dc.subjectRodenten
dc.subjectSequence Homologyen
dc.subjectSex Chromosomeen
dc.subjectSpecies Differenceen
dc.subjectAnimalen
dc.subjectChromosome Bandingen
dc.subjectKaryotypingen
dc.subjectRodentiaen
dc.subjectEchimyidaeen
dc.subjectProechimysen
dc.subjectProechimys Cuvierien
dc.subjectRattusen
dc.subjectRodentiaen
dc.titleComparative cytogenetics of spiny rats of the genus proechimys (Rodentia, Echimyidae) from the Amazon regionen
dc.typeArtigopt_BR
dc.identifier.doi10.4238/2012.April.3.5-
dc.publisher.journalGenetics and Molecular Researchpt_BR
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