Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/18001
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dc.contributor.authorBonifácio, Heidi L.-
dc.contributor.authorSilva, Vera Maria Ferreira da-
dc.contributor.authorMartin, Anthony Richard-
dc.contributor.authorFeldberg, Eliana-
dc.date.accessioned2020-06-15T21:50:49Z-
dc.date.available2020-06-15T21:50:49Z-
dc.date.issued2012-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/18001-
dc.description.abstractClassical and molecular cytogenetic (18S rDNA, telomeric sequence, and LINE-1 retrotransposon probes) studies were carried out to contribute to an understanding of the organization of repeated DNA elements in the Amazon River dolphin (boto, Inia geoffrensis). Twenty-seven specimens were examined, each presenting 2n = 44 chromosomes, the karyotype formula 12m + 14sm + 6st + 10t + XX/XY, and fundamental number (FN) = 74. C-positive heterochromatin was observed in terminal and interstitial positions, with the occurrence of polymorphism. Interstitial telomeric sequences were not observed. The nucleolar organizer region (NOR) was located at a single site on a smallest autosomal pair. LINE-1 was preferentially distributed in the euchromatin regions, with the greatest accumulation on the X chromosome. Although the karyotype structure in cetaceans is considered to be conserved, the boto karyotype demonstrated significant variations in its formula, heterochromatin distribution, and the location of the NOR compared to other cetacean species. These results contribute to knowledge of the chromosome organization in boto and to a better understanding of karyoevolution in cetaceans. © 2012 Springer Science+Business Media B.V.en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 140, Número 7-9, Pags. 307-315pt_BR
dc.rightsRestrito*
dc.subjectRibosome Dnaen
dc.subjectAnimalsen
dc.subjectChromosome Noren
dc.subjectCytogeneticsen
dc.subjectDolphinen
dc.subjectEuchromatinen
dc.subjectGeneticsen
dc.subjectKaryotypingen
dc.subjectMetabolismen
dc.subjectRiveren
dc.subjectAnimalen
dc.subjectCytogeneticsen
dc.subjectRibosomal Dnaen
dc.subjectDolphinsen
dc.subjectEuchromatinen
dc.subjectKaryotypingen
dc.subjectNucleolus Organizer Regionen
dc.subjectRiversen
dc.subjectCetaceaen
dc.subjectInia Geoffrensisen
dc.titleMolecular cytogenetic characterization of the Amazon River dolphin Inia geoffrensisen
dc.typeArtigopt_BR
dc.identifier.doi10.1007/s10709-012-9680-7-
dc.publisher.journalGeneticapt_BR
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