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Última A note on the population genetic consequences of delayed larval development in insects Genet. Mol. Biol. Salles,Marcos Mattoso de; Otto,Paulo A.. Observations by Dobzhansky's group in the 1940s suggesting that the presence of recessive genotypes could account for lower larval developmental rates in Drosophila melanogaster were not confirmed at the time and all subsequent investigations on this subject focused on the analysis of ecological models based on competition among pre-adult individuals. However, a paper published in this journal in 1991 eventually confirmed the finding made by Dobzhansky and his co-workers. In this report, we provide a theoretical analysis of the population genetic effects of a delay in the rate of larval development produced by such a genetic mechanism. Tipo: Info:eu-repo/semantics/article Palavras-chave: Difference and differential equations; Drosophila; Dynamic systems; Larval development; Population genetics. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300019 Assemblages of drosophilids (Diptera, Drosophilidae) in mangrove forests: community ecology and species diversity Iheringia, Sér. Zool. Schmitz,Hermes J.; Hofmann,Paulo R. P.; Valente,Vera L. S.. Brazilian fauna of drosophilids has been researched in various ecosystems, but those in mangrove forests remain overlooked in Brazil and elsewhere. The present study attempts to characterise the assemblages of drosophilids of this environment, based on 28 collections taken in three mangrove areas in Santa Catarina Island, southern Brazil. The three mangroves surveyed were different in their surroundings, which varied from highly urbanised areas to conservation areas with natural vegetation. Overall, 69 species were collected, and no remarkable difference was detected in species composition and abundances or in the richness, evenness and heterogeneity between sites. The species abundance distribution observed fitted to a theoretical lognormal distribution... Tipo: Info:eu-repo/semantics/report Palavras-chave: Biodiversity; Diversity measures; Drosophila; Neotropical region; Source-sink hypothesis. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000200008 Biogeographical aspects of drosophilids (Diptera, Drosophilidae) of the Brazilian savanna Rev. Bras. entomol. Chaves,Natália Barbi; Tidon,Rosana. Some species of drosophilids have been intensely studied, especially in the areas of genetics and molecular biology. However, little is known about their ecology and biogeography. Here, we revise the records of Drosophilidae species in the Cerrado domain, in order to organize the available information and to recognize patterns of geographic distribution and endemism. The 43 sampled sites in this domain reveal 100 species of drosophilids (10 of them exotic to the Neotropical region), distributed in eight genera. The collections were concentrated mainly in the States of Goiás (including the Federal District) and Minas Gerais. Serra do Cipó is the site with the highest richness of these insects. Of the 90 neotropical species found in the Cerrado, 77 also... Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila; Exotic species; Neotropical species; Pattern of distribution; Zaprionus. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000300005 Breeding sites of drosophilids (Diptera) in the Brazilian Savanna. I. Fallen fruits of Emmotum nitens (Icacinaceae), Hancornia speciosa (Apocynaceae) and Anacardium humile (Anacardiaceae) Rev. Bras. entomol. Roque,Francisco; Hay,John Du Vall; Tidon,Rosana. In this study, drosophilids that bred in fruits of three common plant species of the Brazilian Savanna were investigated: Emmotum nitens, Hancornia speciosa and Anacardium humile, along with the temporal and spatial distribution of these insects among fruits obtained from six individuals of E. nitens. Fallen fruits were collected in natural environments, placed on moist sand in individual containers and all drosophilids that emerged from these resources during 15 days were collected, counted and identified. From 3,651 fruits collected (3,435 of E. nitens, 179 of A. humile and 37 of H. speciosa) 4,541 flies emerged and were classified into 19 species of Drosophilidae. Their distribution was unequal among the three resources, also over time, and among the... Tipo: Info:eu-repo/semantics/other Palavras-chave: Biodiversity; Cerrado biome; Drosophila. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262009000200016 Changes in Brazilian Drosophilidae (Diptera) assemblages across an urbanisation gradient Neotropical Entomology Gottschalk,Marco S.; De Toni,Daniela C.; Valente,Vera L.S.; Hofmann,Paulo R.P.. The present study aims to characterise the assemblages of Drosophilidae sampled from four sites subject to different levels of urbanisation, in the city of Florianópolis, South Brazil. Five samples were collected between August 2000 and August 2001 and five between August 2002 and August 2003 in each site. A gradual change in the dominant species was observed in the urbanisation gradient, with an increase in relative abundance of exotic species in urban areas. Among the native species, the relative abundance of Drosophila capricorni Dobzhansky &amp; Pavan had an expressive decrease. In the other hand the richness in the low urbanisation site increased, probably due to the presence of urban gardens. The diversity index did not vary significantly among... Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila; Zaprionus; Ecology; Diversity; Richness. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000600005 Chromosomal phylogeny of the Drosophila fasciola species subgroup revisited (Diptera, Drosophilidae) Genet. Mol. Biol. Diniz,Nilda Maria; Sene,Fabio Melo. The analysis of polytene chromosomes in 26 strains of seven species in the Drosophila fasciola subgroup, from several locations in Brazil, in addition to strains of two species belonging to the Drosophila mulleri subgroup (D. aldrichi and D. mulleri), enabled us to determine that the 3c inversion found in the latter species differ in one of its break points from that present in the species of the fasciola subgroup. Therefore, a change in the mulleri complex denomination from inversion 3c to inversion 3u is proposed. Accordingly, the fasciola subgroup is no longer a lesser phylogenetic part within the mulleri subgroup. Rather, it is directly related to the likely ancestor of the repleta group, called Primitive I. This information removes the main obstacle... Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila; Chromosome phylogeny; Repleta group; Fasciola subgroup; Chromosome inversions. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400016 Detection of P element transcripts in embryos of Drosophila melanogaster and D. willistoni Anais da ABC (AABC) Blauth,Monica L.; Bruno,Rafaela V.; Abdelhay,Eliana; Loreto,Elgion L.S.; Valente,Vera L.S.. The P element is one of the most thoroughly studied transposable elements (TE). Its mobilization causes the hybrid dysgenesis that was first described in Drosophila melanogaster. While studies of the P element have mainly been done in D. melanogaster, it is believed that Drosophila willistoni was the original host species of this TE and that P was transposed to the D. melanogaster genome by horizontal transfer. Our study sought to compare the transcriptional behavior of the P element in embryos of D. melanogaster, which is a recent host, with embryos of two strains of D. willistoni, a species that has contained the P element for a longer time. In both species, potential transcripts of transposase, the enzyme responsible for the TE mobilization, were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila; D. willistoni hybrid dysgenesis RNAi P element transposable element. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400007 Diagnóstico de adultos de Drosophila Suzukii e Zaprionus sp. em duas regiões produtoras de morando do Rio Grande do Sul. Repositório Alice KLESENER, D. F.; SANTOS, R. S. S. dos; BOFF, M. I. C.; RIBEIRO, A. M. A.; MARCHIORETTO, L. R.; AMARAL, L. O.. A família Drosophilidae (Diptera) abriga espécies que causam prejuízos à agricultura, infestando diferentes frutíferas em todo o mundo. Tipo: Separatas Palavras-chave: Rio Grande do Sul; Brasil; Morango; Drosophila; Drosophila suzukii; Zaprionus. Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1102394 Distribution and conservation of the transposable element gypsy in drosophilid species Genet. Mol. Biol. Herédia,Fabiana; Loreto,Elgion Lúcio S.; Valente,Vera Lúcia S.. In an attempt to understand the dynamics of transposable elements (T'S) in the genome of host species, we investigated the distribution, representativeness and conservation of DNA sequences homologous to the Drosophila melanogaster gypsy retrotransposon in 42 drosophilid species. Our results extended the knowledge about the wide distribution of gypsy in the genus Drosophila, including several Neotropical species not previously studied. The gypsy-like sequences showed high divergence compared to the D. melanogaster gypsy element. Furthermore, the conservation of the restriction sites between gypsy sequences from phylogenetically unrelated species pointed to a more complex evolutionary picture, which includes the possibility of the horizontal transfer events... Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila; Retrotransposon; Gypsy; Southern blot; PCR. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100023 Distribution and insertion numbers of transposable elements in species of the Drosophila saltans group Genet. Mol. Biol. Castro,Juliana P. de; Setta,Nathalia de; Carareto,Claudia Marcia A.. Information about the distribution and insertion numbers of many transposable elements is restricted to few species of Drosophila, although these elements are widely distributed throughout the genus. The aim of this work was to describe the distribution and insertion numbers of four retrotransposons (copia, gypsy, micropia, I) and four transposons (hobo, mariner, Minos and Bari-1) in the saltans group of Drosophila. Our data shows that, except for mariner, all the other elements are widespread within the saltans group and show variable insertion numbers of up to 24 copies. Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila; Genomic insertion; Saltans group; Retrotransposons; Transposons. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200029 Dmp53, basket and drICE gene knockdown and polyphenol gallic acid increase life span and locomotor activity in a Drosophila Parkinson's disease model Genet. Mol. Biol. Ortega-Arellano,Hector Flavio; Jimenez-Del-Rio,Marlene; Velez-Pardo,Carlos. Understanding the mechanism(s) by which dopaminergic (DAergic) neurons are eroded in Parkinson's disease (PD) is critical for effective therapeutic strategies. By using the binary tyrosine hydroxylase (TH)-Gal4/UAS-X RNAi Drosophila melanogaster system, we report that Dmp53, basket and drICE gene knockdown in dopaminergic neurons prolong life span (p < 0.05; log-rank test) and locomotor activity (p < 0.05; χ² test) in D. melanogaster lines chronically exposed to (1 mM) paraquat (PQ, oxidative stress (OS) generator) compared to untreated transgenic fly lines. Likewise, knockdown flies displayed higher climbing performance than control flies. Amazingly, gallic acid (GA) significantly protected DAergic neurons, ameliorated life span, and climbing... Tipo: Info:eu-repo/semantics/article Palavras-chave: Basket; Dmp53; Drice; Drosophila; Paraquat. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400020 Drosophila relics hobo and hobo-MITEs transposons as raw material for new regulatory networks Genet. Mol. Biol. Loreto,Elgion L.S.; Deprá,Maríndia; Diesel,José F.; Panzera,Yanina; Valente-Gaiesky,Vera Lucia S.. Abstract Hypermutable strains of Drosophila simulans have been studied for 20 years. Several mutants were isolated and characterized, some of which had phenotypes associated with alteration in development; for example, showing ectopic legs with eyes being expressed in place of antennae. The causal agent of this hypermutability is a non-autonomous hobo-related sequence (hoboVA). Around 100 mobilizable copies of this element are present in the D. simulans genome, and these are likely mobilized by the autonomous and canonical hobo element. We have shown that hoboVA has transcription factor binding sites for the developmental genes, hunchback and even-skipped, and that this transposon is expressed in embryos, following the patterns of these genes. We suggest... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hobo; Transposable elements; Cis-regulatory sequences; Drosophila. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000200198 Drosophilidae (Diptera) associated to fungi: differential use of resources in anthropic and Atlantic Rain Forest areas Iheringia, Sér. Zool. Gottschalk,Marco S; Bizzo,Luís; Döge,Jonas S; Profes,Marcos S; Hofmann,Paulo R. P; Valente,Vera L. S. This study investigates the Drosophilidae species associated to fruiting bodies of fungi in forested and anthropized environments of the Atlantic Rain Forest Biome, in south and southeastern Brazil. We collected samples of imagoes flying over and emerging from fruiting bodies of species of five fungi families, in six collection sites. We obtained 18 samples, from which emerged 910 drosophilids of 31 species from the genera Drosophila Fallen, 1823, Hirtodrosophila Duda, 1923, Leucophenga Mik, 1886, Mycodrosophila Oldenberg, 1914, Scaptomyza Hardy, 1849, Zaprionus Coquillett, 1901 and Zygothrica Wiedemann, 1830. The Drosophila species collected on fungi, as well as Zaprionus indianus Gupta, 1970, had previously been recorded colonizing fruits, demonstrating... Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila; Mycophagous insects; Feeding sites; Breeding sites. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000400016 Drosophilids (Diptera) from an Atlantic Forest Area in Santa Catarina, Southern Brazil Rev. Bras. entomol. Döge,Jonas S.; Valente,Vera L. S.; Hofmann,Paulo R. P.. The present work aims at knowing the faunal composition of drosophilids in forest areas of southern Brazil. Besides, estimation of species richness for this fauna is briefly discussed. The sampling were carried out in three well-preserved areas of the Atlantic Rain Forest in the State of Santa Catarina. In this study, 136,931 specimens were captured and 96.6% of them were identified in the specific level. The observed species richness (153 species) is the largest that has been registered in faunal inventories conducted in Brazil. Sixty-three of the captured species did not fit to the available descriptions, and we believe that most of them are non-described species. The incidence-based estimators tended to give rise to the largest richness estimates while... Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic Rain Forest; Drosophila; Neotropic; Species richness estimation; Taxonomic survey. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000400013 Drosophilids (Insecta, Diptera) of the Paranã Valley: eight new records for the Cerrado biome Biota Neotropica Mata,Renata Alves da; Roque,Francisco; Tidon,Rosana. The Paranã Valley, located in the Central Brazil Plateau, within the domain of the Cerrado biome, is frequently cited as a center of endemism and diversity. Nonetheless, this region is poorly known, mainly considering its invertebrate fauna. Here, drosophilid flies were used as biological tools to contribute to a broader inventory, whose goals were mapping the Cerrado biodiversity and identifying areas to be conserved. Three previously unsampled areas in the Paranã Valley were sampled. Amongst the 12,297 specimens collected 45 species were identified, which represents 50% of the drosophilid species previously recorded in the Cerrado. Moreover, this sampling presented eight new occurrences for the biome (Drosophila annulosa, D. calloptera, D. papei, D.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Brazilian savanna; Central Brazil Plateau; Conservation; Drosophila; Inventory. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000100006 EFECTO DE DENSIDAD POBLACIONAL DE HUEVOS SOBRE VIABILIDAD Y TIEMPO DE DESARROLLO DE Drosophila melanogaster (DROSOPHILIDAE) Acta biol.Colomb. FONG,CRISTIAN; DÍAZ,FERNANDO; OSORIO,JULIO; CASTANO,LINA; GONZÁLEZ,FANNY; JURADO,LAURA; CASTILLO,KATHERINE; CÁRDENAS,HEIBER. Para estimar el efecto de la densidad poblacional de huevos sobre la viabilidad huevoadulto de Drosophila melanogaster se realizaron tres tratamientos en frascos con medio de cultivo agar-banano: a densidad de 10, 50 y 90 huevos. La variable de respuesta fue la proporción de individuos adultos emergidos desde la aparición del primer imago hasta 15 días después de la siembra. Las viabilidades huevo-adulto promedio fueron 0,320, 0,338 y 0,328 para las densidades de 10, 50 y 90 huevos respectivamente. No se evidenciaron diferencias significativas entre los tres tratamientos (p>0.05). Por lo tanto, no se detectó en este estudio influencia de la densidad poblacional de huevos sobre la viabilidad huevo-adulto. Probablemente debido a que la proporción entre el... Tipo: Info:eu-repo/semantics/article Palavras-chave: Densidad poblacional; Drosophila; Huevos; Viabilidad. Ano: 2008 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2008000200008 Effect of single cell protein as a protein source in Drosophila culture BJM Uysal,Handan; Aydogan,M. Nuri; Algur,O. Faruk. The effects of biomass of Phanerochaete chrysosporium at various concentrations (1; 2.5; 5; 10; 25; 50; 75 and 100%) on the growth of Drosophila melanogaster have been investigated. Biomass was used as a protein source instead of corn flour in Standard Drosophila Medium(SDM). It was seen that it causes increments in both body size of larvae and the numbers of offsprings, especially at higher concentrations (50, 75 and 100%). At the application of 100% concentration, metamorphosis accelerated and was completed one day before the control. There were phenotipic abnormalities in both control (0.64%) and applications with low concentrations (0.02-0.19%), while they were not observed at the application of 100% concentration Tipo: Info:eu-repo/semantics/article Palavras-chave: Single cell protein; Toxicity; Drosophila; Phanerochaete chrysosporium. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000400007 Enhanced tethered-flight duration and locomotor activity by overexpression of the human gene SOD1 in Drosophila motorneurons Genet. Mol. Biol. Petrosyan,Agavni; Hsieh,I-Hui; Phillips,John P.; Saberi,Kourosh. Mutation of the human gene superoxide dismutase (hSOD1) is associated with the fatal neurodegenerative disease familial amyotrophic lateral sclerosis (Lou Gehrig’s disease). Selective overexpression of hSOD1 in Drosophila motorneurons increases lifespan to 140% of normal. The current study was designed to determine resistance to lifespan decline and failure of sensorimotor functions by overexpressing hSOD1 in Drosophila‘s motorneurons. First, we measured the ability to maintain continuous flight and wingbeat frequency (WBF) as a function of age (5 to 50 days). Flies overexpressing hSOD1 under the D42-GAL4 activator were able to sustain flight significantly longer than controls, with the largest effect observed in the middle stages of life. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Behavioral genetics; Superoxide dismutase; Drosophila; Motorneuron; Longevity. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000100107 Evolution of DNMT2 in drosophilids: Evidence for positive and purifying selection and insights into new protein (pathways) interactions Genet. Mol. Biol. Vieira,Gilberto Cavalheiro; D’Ávila,Marícia Fantinel; Zanini,Rebeca; Deprá,Maríndia; da Silva Valente,Vera Lúcia. Abstract The DNA methyltransferase 2 (DNMT2) protein is the most conserved member of the DNA methyltransferase family. Nevertheless, its substrate specificity is still controversial and elusive. The genomic role and determinants of DNA methylation are poorly understood in invertebrates, and several mechanisms and associations are suggested. In Drosophila, the only known DNMT gene is Dnmt2. Here we present our findings from a wide search for Dnmt2 homologs in 68 species of Drosophilidae. We investigated its molecular evolution, and in our phylogenetic analyses the main clades of Drosophilidae species were recovered. We tested whether the Dnmt2 has evolved neutrally or under positive selection along the subgenera Drosophila and Sophophora and investigated... Tipo: Info:eu-repo/semantics/article Palavras-chave: Drosophila; Dnmt2; Positive selection; Epigenetic; Positive-destabilizing selection. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000200215 Factors affecting the biology of Pachycrepoideus vindemmiae (Hymenoptera: Pteromalidae), a parasitoid of spotted-wing drosophila (Drosophila suzukii). Repositório Alice SILVA, C. S. B. D.; PRICE, B. E.; SOOHOO-HUI, A.; WALTON, V. M.. Pachycrepoideus vindemmiae is a wasp that parasitizes and host-feeds on pupae of the invasive spotted-wing drosophila (SWD, Drosophila suzukii). Few studies have addressed interactions between these two species and little is known about the potential of this parasitoid as a biocontrol agent of SWD and the different variables that may affect it. Here, we investigated the impact of extrinsic and intrinsic factors on life-history traits of P. vindemmiae. Both constant (entire adulthood) and limited (30 minutes) supplies of water + honey, honey, or host increased parasitoid survival compared to controls (water or fasting). Water + honey caused the highest parasitoid survivals (35?60 days), independent of supply period, sex, and host availability. Females were... Tipo: Artigo de periódico Palavras-chave: Pachycrepoideus vindemmiae; Drosophila; Water; Parasitoids. Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118757 Registros recuperados: 50 Primeira ... 1 2 3 ... Última

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