NOR- bearing as a plesiomorphic characteristic in Mimus saturninus (Passeriformes Mimidae)

Journal of Biotechnology and Biodiversity

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Title NOR- bearing as a plesiomorphic characteristic in Mimus saturninus (Passeriformes Mimidae)
NOR- bearing as a plesiomorphic characteristic in Mimus saturninus (Passeriformes Mimidae)
 
Creator Kretschmer, Rafael
Lima, Vanusa Lilian
Degrandi, Tiago Marafiga
Vinadé, Lucia
Schünemann, Adriano Luis
Garnero, Analía Del Valle
Gunski, Ricardo José
 
Subject Karyotype
macro and microchromosomes
chromosome banding
cariotipo
macro y microcromosomas
bandas cromosómicas
cariótipo
macro e microcromossomos
faixas cromossomicas
 
Description The order Passeriformes is the largest group of species karyotyped among birds, however little is known about the cytogenetic of the Mimidae family, registering only karyology basic data (giemsa staining). The aim of this study was to analyze the chromosomal complement from the species Mimus saturninus by conventional staining and differential chromosome banding. Diploid number and chromosome morphology were determined, as well as the distribution pattern of constitutive heterochromatin (CBG-banding), GTG-banding andAgNOR staining (NORs). The Chalk-browed Mockingbird has 2n=80. The first and fourth pairs are submetacentric and the second, third and fifth are acrocentric. The remaining chromosomes pairs of the complement have telocentric morphology. The Z chromosome is submetacentric and the W is metacentric. CBG-banding showed positive staining in the pericentromeric region of most macrochromosomes and microchromosomes and also at Z chromosome, differently from W chromosome which appeared totally heterochromatic. The GTG-banding was similar to Gallus gallus and in other species which have already been GTG-banded. The NORs were identified in a pair of microchromosomes characterized by presenting a remarkable secondary constriction. This can be considered as a plesiomorphic characteristic for M. saturninus once baseline groups (Paleognathae) also showed a pair of microchromosomes bearing NORs.
The order Passeriformes is the largest group of species karyotyped among birds, however little is known about the cytogenetic of the Mimidae family, registering only karyology basic data (giemsa staining). The aim of this study was to analyze the chromosomal complement from the species Mimus saturninus by conventional staining and differential chromosome banding. Diploid number and chromosome morphology were determined, as well as the distribution pattern of constitutive heterochromatin (CBG-banding), GTG-banding andAgNOR staining (NORs). The Chalk-browed Mockingbird has 2n=80. The first and fourth pairs are submetacentric and the second, third and fifth are acrocentric. The remaining chromosomes pairs of the complement have telocentric morphology. The Z chromosome is submetacentric and the W is metacentric. CBG-banding showed positive staining in the pericentromeric region of most macrochromosomes and microchromosomes and also at Z chromosome, differently from W chromosome which appeared totally heterochromatic. The GTG-banding was similar to Gallus gallus and in other species which have already been GTG-banded. The NORs were identified in a pair of microchromosomes characterized by presenting a remarkable secondary constriction. This can be considered as a plesiomorphic characteristic for M. saturninus once baseline groups (Paleognathae) also showed a pair of microchromosomes bearing NORs.
 
Publisher Universidade Federal do Tocantins - UFT
 
Date 2014-04-04
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Artigo
Artigo
 
Format application/pdf
application/zip
 
Identifier https://sistemas.uft.edu.br/periodicos/index.php/JBB/article/view/1203
10.20873/jbb.uft.cemaf.v5n2.kretschmer
 
Source Journal of Biotechnology and Biodiversity; v. 5 n. 2 (2014): Journal of Biotechnology and Biodiversity; 140-147
2179-4804
 
Language eng
 
Relation https://sistemas.uft.edu.br/periodicos/index.php/JBB/article/view/1203/8074
https://sistemas.uft.edu.br/periodicos/index.php/JBB/article/view/1203/15449
 
Rights Copyright (c) 2014 Journal of Biotechnology and Biodiversity
 

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