Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.creatorChiavegatto, Raquel Bezerra-
dc.creatorChaves, Ana Luisa Arantes-
dc.creatorRocha, Laiane Corsini-
dc.creatorBenites, Flávio Rodrigo Gandolfi-
dc.creatorPeruzzi, Lorenzo-
dc.creatorTechio, Vânia Helena-
dc.identifier.citationCHIAVEGATTO, R. B. et al. Heterochromatin bands and rDNA sites evolution in polyploidization events in Cynodon Rich. (Poaceae). Plant Molecular Biology Reporter, [S.l.], v. 37, p. 477-487, Dec. 2019. DOI: 10.1007/s11105-019-01173-2.pt_BR
dc.description.abstractCynodon is a genus with a wide distribution in tropical and subtropical areas. Ploidy levels in Cynodon range from diploid to hexaploid; hence, polyploidy is the most important driver of chromosome number variation in this genus. After polyploidization, structural rearrangements such as deletions, insertion, or duplications of DNA sequences frequently occur, allowing variation of chromosome morphology, size, and number. These events might result in a wide diversity of karyotypes, contributing to reproductive isolation, and consequently to speciation. In this study, we investigate the karyotype variation of Cynodon based on comparative cytogenetic analyses. We conducted chromosome counts, DNA quantification, CMA/DAPI double staining, and FISH mapping of 5S and 35S rDNA sites. Cytomolecular data were analyzed in a phylogenetic framework, in order to trace the evolutionary history of the karyotype variation considering polyploidy events in this group. Our results indicate that the most recent common ancestor of Cynodon had two 35S and 5S rDNA sites, two CMA bands, nine DAPI+ bands on the long arm, five DAPI+ bands on the short arm, and three DAPI+ bands in the pericentromeric region. During polyploidization events, there were losses and gains of heterochromatic sequences mainly on the short arms and centromeric regions.pt_BR
dc.sourcePlant Molecular Biology Reporterpt_BR
dc.subjectChromosome evolutionpt_BR
dc.subjectForage grasspt_BR
dc.subjectKaryotype variationpt_BR
dc.subjectPloidy levelpt_BR
dc.titleHeterochromatin bands and rDNA sites evolution in polyploidization events in Cynodon Rich. (Poaceae)pt_BR
Appears in Collections:DBI - Artigos publicados em periódicos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.