Consulta: creatorFacets:"Mestres,Francesc"
Registros recuperados: 4
Data/hora: 09/06/2024 09:22:07

A cytological study of the O5 chromosomal inversion of Drosophila subobscura (Diptera, Drosophilidae)
Provedor de dados: 74
Autores: 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

Phenotypic plasticity in colonizing populations of Drosophila subobscura
Provedor de dados: 74
Autores: Pegueroles,Glòria; Mestres,Francesc; Argemí,Mercè; Serra,Lluís.
The phenotypic plasticity of some quantitative traits of two colonizing populations of Drosophila subobscura (Davis and Eureka, California) was studied. Temperature effects and the effect of rearing in the laboratory were studied. Laboratory rearing during four generations at 18ºC significantly increased the wing and tibial length. This increase was similar to that obtained when the flies were reared at 13ºC during two generations.The low temperature environment can be considered more stressful for females than for males, as shown by the increase of phenotypic variance. The two populations analyzed had great phenotypic plasticity in spite of the genetic bottleneck during the colonization event. Our study shows that keeping flies for a relatively short time...
Tipo: Info:eu-repo/semantics/article
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000400008

Changes in chromosomal polymorphism and global warming: the case of Drosophila subobscura from Apatin (Serbia)
Provedor de dados: 74
Autores: Zivanovic,Goran; Mestres,Francesc.
In this study, chromosomal inversion polymorphism data for a natural population of Drosophila subobscura from a swampy region near the town of Apatin (Serbia) were compared with data for the same population collected approximately 15 years earlier. The pattern of chromosomal inversion polymorphism changed over time. There were significant increases in the frequency of characteristic southern latitude ("warm" adapted) chromosomal arrangements and significant decreases in the frequency of characteristic northern latitude ("cold" adapted) chromosomal arrangements in the O and U chromosomes. The chromosomal arrangements O3+4 and O3+4+22 (derived from the O3+4 arrangement) showed significant increases in 2008 and 2009 with regard to the 1994 sample. There was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromosomal inversions; Drosophila subobscura; Global warming; Karyotypes.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300020

One-winged Drosophila subobscura: a phenotype with an obscure genetic basis
Provedor de dados: 54
Autores: Orengo,Dorcas J.; Hauschteck-Jungen,Elisabeth; Mestres,Francesc.
A line of one-winged Drosophila subobscura was studied. The absent wing is substituted by a bulky structure with macro and microchaetes, showing a thoracic appearance. Genetic crosses showed that there is no way to select for the trait by simple crossing. The number of one-winged flies in the various generations was always low. In one case a wingless fly was also obtained. The trait presents an unknown genetic pattern.
Tipo: Info:eu-repo/semantics/article
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000300001