Nucleolar organizer regions in Sittasomus griseicapillus and Lepidocolaptes angustirostris (Aves, Dendrocolaptidae): evidence of a chromosome inversion

Cytogenetic studies in birds are still scarce compared to other vertebrates. Woodcreepers (Dendrocolaptidae) are part of a highly specialized group within the Suboscines of the New World. They are forest birds exclusive to the Neotropical region and similar to woodpeckers, at a comparable evolutionary stage. This paper describes for the first time the karyotypes of the Olivaceous and the Narrow-billed Woodcreeper using conventional staining with Giemsa and silver nitrate staining of the nucleolar organizer regions (Ag-NORs). Metaphases were obtained by fibular bone marrow culture. The chromosome number of the Olivaceous Woodcreeper was 2n = 82 and of the Narrow-billed Woodcreeper, 2n = 82. Ag-NORs in the largest macrochromosome pair and evidence of a chromosome inversion are described herein for the first time for this group.

Bibliographic Details

Main Authors:	Barbosa,Marcelo de Oliveira, Silva,Rubens Rodrigues da, Correia,Vanessa Carolina de Sena, Santos,Luana Pereira dos, Garnero,Analía del Valle, Gunski,Ricardo José
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Genética 2013
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100010
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