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A cytological study of the O5 chromosomal inversion of Drosophila subobscura (Diptera, Drosophilidae) Genet. Mol. Biol.
Mestres,Francesc; Figueras,Maria Teresa; Serra,Luís.
The O5 chromosomal inversion has been a cornerstone for understanding different aspects of the American colonization by Drosophila subobscura. To obtain more information of this evolutionary event it is important to know the pattern of bands of this inversion in detail. Comparing this pattern with that of D. melanogaster it is possible to predict which genes are located inside or close to the O5 inversion and use them as genetic markers. In this study, the complete band pattern of the O5 inversion is presented. Furthermore, the most important genes located inside it have been predicted. Finally, a constriction located close to the proximal breakage point of the O5 inversion has been observed many times and its possible genetic significance is discussed.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosohila subobscura; Chromosomal inversion; Colonization; Lethal genes.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400007
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Nucleolar organizer regions in Sittasomus griseicapillus and Lepidocolaptes angustirostris (Aves, Dendrocolaptidae): evidence of a chromosome inversion Genet. Mol. Biol.
Barbosa,Marcelo de Oliveira; Silva,Rubens Rodrigues da; Correia,Vanessa Carolina de Sena; Santos,Luana Pereira dos; Garnero,Analía del Valle; Gunski,Ricardo José.
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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cytogenetics; Woodcreepers; Ag-NOR; Chromosomal inversion.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100010
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