Consulta: subjectFacets:"Drosophila buzzatii"
Registros recuperados: 2
Data/hora: 10/06/2024 16:44:30

Mitochondrial DNA phylogeography of Brazilian populations of Drosophila buzzatii
Provedor de dados: 74
Autores: Brito,Reinaldo A. de; Manfrin,Maura H.; Sene,Fabio M.
The Argentinean Chaco region has been considered the center of origin of Drosophila buzzatii in South America because it contains most of the chromosomal polymorphism detected in natural populations. Two hypotheses have been put forward to explain the distribution of D. buzzatii in Brazil, one proposing that it has only recently passively colonized Brazil via human dispersal and the other suggesting that D. buzzatii has actively migrated to Brazil some time ago. Data from chromosomal inversions support recent colonization, whereas data from allozymes and mtDNA variation indicate that D. buzzatii has been in Brazil longer, favoring an active dispersal hypothesis. In our present work we analyzed data on 56 South American flies, mostly from Brazil, sequenced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drosophila buzzatii; Population structure; Mitochondrial DNA; Phylogeography; Brazil; Climatic cycles.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000200009

Differences in wing melanization and pigmentation pattern in Drosophila buzzatii (Diptera: Drosophilidae) under chemical stress
Provedor de dados: 99
Autores: Mongiardino Koch,Nicolás; Hasson,Esteban; Soto,Ignacio M.
Recently, the genetic basis and developmental mechanisms underlying the process of melanization have become progressively elucidated, allowing us to study the evolutionary processes that govern the huge variability of pigmentation observed in nature. However, environmental factors contributing to such variability have received little attention, even though they might have profound ecological consequences. Here we describe a method for analyzing the wing melanization patterns of drosophilids in both qualitative and quantitative ways. We test this method on wings of Drosophila buzzatii Patterson &amp;amp; Wheeler individuals, reared in control and alkaloid-enriched mediums. The alkaloids were extracted from the secondary host of these flies, Echinopsis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drosophila buzzatii; Melanin; Ecotoxicology; Alkaloids; Stress.
Ano: 2012
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802012000100008