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Taxonomic and evolutionary analysis of Zaprionus indianus and its colonization of Palearctic and Neotropical regions Genet. Mol. Biol.
Commar,Leliane Silva; Galego,Luis Gustavo da Conceição; Ceron,Carlos Roberto; Carareto,Claudia Marcia Aparecida.
Zaprionus indianus is a dipteran (Drosophilidae) with a wide distribution throughout the tropics and temperate Palearctic and Nearctic regions. There have been proposals to reclassify the genus Zaprionus as a subgenus or group of the genus Drosophila because various molecular markers have indicated a close relationship between Zaprionus species and the immigrans-Hirtodrosophila radiation within Drosophila. These markers, together with alloenzymes and quantitative traits, have been used to describe the probable scenario for the expansion of Zaprionus indianus from its center of dispersal (Africa) to regions of Asia (ancient dispersal) and the Americas (recent dispersal). The introduction of Z. indianus into Brazil was first reported in 1999 and the current...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alloenzyme; Bioinvasion; Molecular markers; Phylogenetic analysis; Quantitative traits.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300003
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Differential transcription of ribosomal cistrons denoting nucleolar dominance in hybrids of Drosophila mulleri and Drosophila navojoa (mulleri complex, Repleta group) Genet. Mol. Biol.
Commar,Leliane Silva; Bicudo,Hermione E.M.C.; Rahal,Paula; Ceron,Carlos Roberto.
The fruit flies Drosophila mulleri and Drosophila navojoa are included in the mulleri complex of the mulleri subgroup and Repleta group. Although there is no demonstration that interspecific crosses between them occur in nature, they intercross in the laboratory in both cross directions. Previous data have shown the occurrence of nucleolar dominance in interspecific hybrids of some species in the mulleri complex. We investigated nucleolar dominance in D. mulleri/D. navojoa hybrids using the transcription profiles of the rDNA internal transcribed spacer (ITS-1) region. The results showed that the ribosomal cistrons present in the X chromosome and in the microchromosome of D. navojoa are exclusively or preferentially transcribed in these hybrids depending on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila mulleri; D. navojoa; Interspecific hybrids; Nucleolar dominance; RDNA.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600028
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