Consulta: creatorFacets:"Campos,Lucio Antonio de Oliveira"
Registros recuperados: 5
Data/hora: 05/06/2024 18:03:20

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

Prediction of social structure and genetic relatedness in colonies of the facultative polygynous stingless bee Melipona bicolor (Hymenoptera, Apidae)
Provedor de dados: 74
Autores: Reis,Evelyze Pinheiro dos; Campos,Lucio Antonio de Oliveira; Tavares,Mara Garcia.
Stingless bee colonies typically consist of one single-mated mother queen and her worker offspring. The stingless bee Melipona bicolor (Hymenoptera: Apidae) shows facultative polygyny, which makes this species particularly suitable for testing theoretical expectations concerning social behavior. In this study, we investigated the social structure and genetic relatedness among workers from eight natural and six manipulated colonies of M. bicolor over a period of one year. The populations of M. bicolor contained monogynous and polygynous colonies. The estimated genetic relatedness among workers from monogynous and polygynous colonies was 0.75 ± 0.12 and 0.53 ± 0.16 (mean ± SEM), respectively. Although the parental genotypes had significant effects on genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melipona; Microsatellites; Polygyny; Queen number; Social structure.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200028

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

Genetic divergence between Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae) populations
Provedor de dados: 74
Autores: Tavares,Mara Garcia; Pietrani,Nathalia Teixeira; Durvale,Maxwell de Castro; Resende,Helder Canto; Campos,Lucio Antonio de Oliveira.
Melipona quadrifasciata is a stingless bee widely found throughout the Brazilian territory, with two recognized subspecies, M. quadrifasciata anthidioides, that exhibits interrupted metasomal stripes, and M. quadrifasciata quadrifasciata, with continuous metasomal stripes. This study aimed to estimate the genetic variability of these subspecies. For this purpose, 127 colonies from 15 Brazilian localities were analyzed, using nine species-specific microsatellite primers. At these loci, the number of alleles ranged from three to 15 (mean: 7.2), and the observed heterozygosity (Ho) ranged from 0.03-0.21, while the expected heterozygosity (He) ranged from 0.23-0.47. The genetic distances among populations ranged from 0.03-0.45. The F ST multilocus value (0.23)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic differentiation; Microsatellites; Population genetics; Stingless bees.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100016

Karyotype of the gall fly Tomoplagia rudolphi (Lutz &amp;amp; Lima) (Diptera, Tephritidae)
Provedor de dados: 104
Autores: Carneiro,Marco Antônio A.; Gomes,Luiz Fernando; Pompolo,Silvia das Graças; Campos,Lucio Antonio de Oliveira.
The objective of the present study is to describe the karyotype of the fruit fly Tomoplagia rudolphi (Lutz &amp;amp; Lima, 1918). This fly induces the formation of galls on the stems of Vernonia polianthes (Asteraceae). The cytogenetic analysis of cerebral ganglia (larva and pupa) and testis (adults) of T. rudolphi showed a diploid chromosome number of 2n = 10 + xx (female) and 2n = 10 + xy (male). The diploid chromosome number 2n = 12 and the XX/XY sex determination system have been found in most of the species studied. The present investigation constitutes the first cytogenetics study of the genus Tomoplagia Coquilltt, 1910.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromosome; Cyclorrhapha; Cytogenetic; Fruit fly; Sex determination.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000600021