info:eu-repo/semantics/article
First cytogenetic characterization of Loricaria simillima (Loricariidae, Siluriformes) from Paraná River (Argentina) with emphasis in cytotaxonomy of Loricaria
Fecha
2016-11-30Registro en:
Benitez, M. F., Pastori, M. C., Garrido, G. G., Takagui, F.H., Giuliano-Caetano, L., y Fenocchio, A. S. (2016). First cytogenetic characterization of Loricaria simillima (Loricariidae, Siluriformes) from Paraná River (Argentina) with emphasis in cytotaxonomy of Loricaria. Caryologia: Revista Internacional de Citología, Citosistemática y Citogenética. Reino Unido : Taylor & Francis; 70(1), pp. 29-33.3.
2165-5391
CCPI-FCEQyN-A-037
6748
Autor
Benitez, Mauricio Fabián
Pastori, María Cristina
Garrido, Gladys Graciela
Takagui, Fábio Hiroshi
Giuliano-Caetano, Lucia
Fenocchio, Alberto Sergio
Institución
Resumen
This work aims to establish some cytogenetic characteristics of Loricaria simillima from Paraná River. The obtained results show that L. simillima has a 2n = 64 diploid number, with 12 metacentric, 12 sub-metacentric and 40 sub-telo/acrocentric chromosomes. No chromosomal differences were found between sexes. The nucleolus organizer region (NOR) revealed by Ag-NOR was located next to the centromeric region in the short arm of pair 8. The C-bands were pale and detected in pericentromeric regions of the most chromosomes and interstitially on a sub-metacentric pair, coincident with secondary and NORs constriction. A conspicuous interstitial band on an acrocentric chromosome was also observed. Finally DAPI and CMA3 fluorescent bandings showed G-C richness at the NOR region. Present data evidence a great similarity among L. simillima, L. cataphracta and L. carinata, reinforcing the hypothesis that they constitute a closely related phylogenetic group.