PERSONAL DE APOYO
BENITEZ Mauricio FabiÁn
artículos
Título:
First cytogenetic characterization of Loricaria simillima (Loricariidae, Siluriformes) from Paraná River (Argentina) with emphasis in cytotaxonomy of Loricaria
Autor/es:
BENITEZ, MAURICIO FABIÁN; PASTORI, MARÍA CRISTINA; GARRIDO, GLADYS GRACIELA; TAKAGUI, FABIO; LUCIA GIULANO; FENOCCHIO, ALBERTO SERGIO
Revista:
CARYOLOGIA
Editorial:
UNIV FLORENCE BOTANY INST
Referencias:
Lugar: Florencia; Año: 2017 vol. 70 p. 29 - 33
ISSN:
0008-7114
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 interstitiallyon 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.
