Consulta: creatorFacets:"Salomão,Tânia Maria Fernandes"
Registros recuperados: 9
Data/hora: 02/06/2024 13:40:00

Evidence of ectopic recombination and a repeat-induced point (RIP) mutation in the genome of Sclerotinia sclerotiorum, the agent responsible for white mold
Provedor de dados: 74
Autores: Goldfarb,Míriam; Santana,Mateus Ferreira; Salomão,Tânia Maria Fernandes; Queiroz,Marisa Vieira de; Barros,Everaldo Gonçalves de.
Abstract Two retrotransposons from the superfamilies Copia and Gypsy named as Copia-LTR_SS and Gypsy-LTR_SS, respectively, were identified in the genomic bank of Sclerotinia sclerotiorum. These transposable elements (TEs) contained direct and preserved long terminal repeats (LTR). Domains related to codified regions for gag protein, integrase, reverse transcriptase and RNAse H were identified in Copia-LTR_SS, whereas in Gypsy-LTR_SS only domains for gag, reverse transcriptase and RNAse H were found. The abundance of identified LTR-Solo suggested possible genetic recombination events in the S. sclerotiorum genome. Furthermore, alignment of the sequences for LTR elements from each superfamily suggested the presence of a RIP (repeat-induced point mutation)...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Phytopathogens; Retrotransposons; Transposable elements.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000300426

Genetic diversity and structure of Atta robusta (Hymenoptera, Formicidae, Attini), an endangered species endemic to the restinga ecoregion
Provedor de dados: 74
Autores: Reis,Evelyze Pinheiro dos; Salomão,Tânia Maria Fernandes; Campos,Lucio Antonio de Oliveira; Tavares,Mara Garcia.
The genetic diversity and structure of the ant Atta robusta were assessed by ISSR (inter-simple sequence repeats) in 72 colonies collected from 10 localities in the Brazilian states of Espírito Santo (48 colonies) and Rio de Janeiro (24 colonies). The ISSR pattern included 67 bands, 51 of them (76.1%) polymorphic. Analysis of molecular variance (AMOVA) revealed a high level (57.4%) of inter-population variation, which suggested a high degree of genetic structure that was confirmed by UPGMA (unweighted pair-group method using an arithmetic average) cluster analysis. The significant correlation between genetic and geographic distances (r = 0.64, p &lt; 0.05) indicated isolation that reflected the distance between locations. Overall, the populations were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endemism; Endangered; ISSR; Population genetics; Restinga.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000400015

Cytogenetic characterization of Partamona cupira (Hymenoptera, Apidae) by fluorochromes
Provedor de dados: 74
Autores: Marthe,Jefferson de Brito; Pompolo,Silvia das Graças; Campos,Lucio Antônio de Oliveira; Salomão,Tânia Maria Fernandes; Tavares,Mara Garcia.
Four colonies of the stingless bee Partamona cupira (Hymenoptera: Apidae) were cytogenetically analyzed using conventional staining and the fluorochromes CMA3 e DAPI. The females have 2n = 34 chromosomes (2K=32&lt;img border=0 src="../../../../../../../img/revistas/gmb/2010nahead/ah06a04CarM.gif" align=absmiddle&gt;+2&lt;img border=0 src="../../../../../../../img/revistas/gmb/2010nahead/ah06a04CarA.gif" align=absmiddle&gt;). Some females, however, presented an additional large B acrocentric chromosome, to a total of 2n = 35. Chromosome B and the chromosomal pairs 2, 9 and 10 showed CMA3+ bands, indicating an excess of CG base-pairs. A clear association was verified between the P. helleri B chromosome SCAR marker and the presence of a B chromosome in P....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: B chromosome; SCAR; Stingless bees.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000200009

Comparative study on the use of specific and heterologous microsatellite primers in the stingless bees Melipona rufiventris and M. mondury (Hymenoptera, Apidae)
Provedor de dados: 74
Autores: Lopes,Denilce Meneses; Campos,Lúcio Antônio de Oliveira; Salomão,Tânia Maria Fernandes; Tavares,Mara Garcia.
Due to their high degree of polymorphism, microsatellites are considered useful tools for studying population genetics. Nevertheless, studies of genetic diversity in stingless bees by means of these primers have revealed a low level of polymorphism, possibly the consequence of the heterologous primers used, since in most cases these were not specifically designed for the species under consideration. Herein we compared the number of polymorphic loci and alleles per locus, as well as observed heterozygosity in Melipona rufiventris and M. mondury populations, using specific and heterologous primers. The use of specific primers placed in evidence the greater frequency of polymorphic loci and alleles per locus, besides an expressive increase in observed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melipona; Stingless bees; Microsatellite; Transferability.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000200030

Genetic divergence between populations of the stingless bee uruçu amarela (Melipona rufiventris group, Hymenoptera, Meliponini): is there a new Melipona species in the Brazilian state of Minas Gerais?
Provedor de dados: 74
Autores: Tavares,Mara Garcia; Dias,Luiz Antonio dos Santos; Borges,Andréia Arantes; Lopes,Denilce Meneses; Busse,Angélica Helene Pereira; Costa,Ronaldo Guimarães; Salomão,Tânia Maria Fernandes; Campos,Lucio Antonio de Oliveira.
Allozyme, microsatellite and random amplified polymorphic DNA (RAPD) molecular markers were used to investigate the within and between population genetic variability and between population genetic differentiation of the Brazilian stingless bee uruçu amarela (nominally Melipona rufiventris Lepeletier, 1836) present in savanna and Atlantic forest habitats of the Brazilian state of Minas Gerais (MG). We found low levels of within population variability, although there were a large number of private alleles that specifically characterized these populations. The F ST values indicated a high level of genetic diversity between populations. Analysis of molecular variance (AMOVA) showed a high degree of population differentiation between the savanna and Atlantic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endangered species; Genetic divergence; Molecular markers; Stingless bees; Uruçu amarela.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400027

Comparative cytogenetics in three Melipona species (Hymenoptera: Apidae) with two divergent heterochromatic patterns
Provedor de dados: 74
Autores: Cunha,Marina Souza da; Travenzoli,Natália Martins; Ferreira,Riudo de Paiva; Cassinela,Edson Kuatelela; Silva,Henrique Barbosa da; Oliveira,Francisco Plácido Magalhães; Salomão,Tânia Maria Fernandes; Lopes,Denilce Meneses.
Abstract The genus Melipona is subdivided into four subgenera based on morphological characteristics, and two groups based on cytogenetic patterns. The cytogenetic information on this genus is still scarce, therefore, the goal of this study was to characterize Melipona paraensis, Melipona puncticollis, and Melipona seminigra pernigra using the following techniques: C-banding, DAPI/CMA3 fluorochromes, and FISH with an 18S rDNA probe. Melipona paraensis (2n=18) and M. seminigra pernigra (2n=22) were classified as high heterochromatin content species (Group II). Their euchromatin is restricted to the ends of the chromosomes and is CMA3+; the 18S rDNA probe marked chromosome pair number 4. Melipona puncticollis (2n=18) is a low heterochromatin content species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromosomal evolution; DAPI/CMA3 fluorochromes; Fluorescent in situ Hybridization (FISH); Heterochromatin; Meliponini.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000500806

Genetic variability in five populations of Partamona helleri (Hymenoptera, Apidae) from Minas Gerais State, Brazil
Provedor de dados: 74
Autores: Borges,Andreia Arantes; Campos,Lucio Antônio de Oliveira; Salomão,Tânia Maria Fernandes; Tavares,Mara Garcia.
Partamona is a Neotropical genus of stingless bees that comprises 33 species distributed from Mexico to southern Brazil. These bees are well-adapted to anthropic environments and build their nests in several substrates. In this study, 66 colonies of Partamona helleri from five localities in the Brazilian state of Minas Gerais (São Miguel do Anta, Teixeiras, Porto Firme, Viçosa and Rio Vermelho) were analyzed using nine microsatellite loci in order to assess their genetic variability. Low levels of observed (Ho = 0.099-0.137) and expected (He = 0.128-0.145) heterozygosity were encountered and revealed discrete genetic differentiation among the populations (F ST =0.025). AMOVA further showed that most of the total genetic variation (94.24%) in P. helleri was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microsatellites; Partamona helleri; Population genetics; Stingless bees.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400028

Genetic distance and its association with heterosis in cacao
Provedor de dados: 52
Autores: Dias,Luiz Antônio dos Santos; Marita,Jane; Cruz,Cosme Damião; Barros,Everaldo Gonçalves de; Salomão,Tânia Maria Fernandes.
The efficiency of cacao breeding program can be increased by choosing superior crosses to be made between divergent clones. We assessed the genetic distance among five clones with RAPD data (genetic distance - GD) and with yield component data (Mahalanobis distance - MD). The clones were evaluated in a diallel, during five years, for five yield components. A total of 130 RAPD bands were scored. GD and MD were used to determine the correlation between genetic distances among clones and the performance of their hybrids. The correlation between GD and MD was 0.67 (P=0.03). Both distances were related to heterotic performance of hybrids for wet seed weight/plant and wet seed weight/fruit. The average hybrid performance for the same two yield components was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic distances; Heterosis; Performance data; RAPD data; Theobroma cacao L.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300005

Extraction of genomic DNA from Melipona quadrifasciata (Hymenoptera: Apidae, Meliponinae)
Provedor de dados: 54
Autores: Waldschmidt,Ana Maria; Salomão,Tânia Maria Fernandes; Barros,Everaldo Gonçalves de; Campos,Lúcio de Antônio Oliveira.
The objective of the present study was to test three different procedures for DNA extraction of Melipona quadrifasciata based on existing methods for DNA extraction of Apis, plants and fungi. These methods differ in the concentrations of specific substances in the extraction buffer. The results demonstrate that the method used for Apis is not adequate for DNA extraction from M. quadrifasciata. On the other hand, with minor modifications this method and the methods for plants and fungi were adequate for DNA extraction of this stingless bee, both for adults and larvae
Tipo: Info:eu-repo/semantics/article
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000300011