Publications by authors named "Adna Cristina Barbosa de Sousa"

3 Publications

  • Page 1 of 1

Low genetic diversity and high differentiation among relict populations of the neotropical gymnosperm Podocarpus sellowii (Klotz.) in the Atlantic Forest.

Genetica 2015 Feb 23;143(1):21-30. Epub 2014 Dec 23.

Laboratory of Plant Cytogenetics and Evolution, Department of Botany, Federal University of Pernambuco (UFPE), Recife, PE, 50670-420, Brazil.

Podocarpus sellowii (Podocarpaceae) is one of only a few gymnosperms native to Brazil and the sole species of the genus found in the northeastern region of that country. It has a very restricted distribution in this region, with only three known populations in highland forests (called Brejos de Altitude), which apparently have been isolated from each other since the Pleistocene. Due to this long-term isolation and the fact that these populations have few adult individuals and suffer great anthropogenic pressure, low genetic variability is expected, compromising their long-term viability. The present work assessed the genetic variability and structure of northeastern populations of P. sellowii to investigate the role of Pleistocene glaciations on the genetic relationships between them and to propose strategies for their conservation by analyzing the SSR and ISSR markers of adult and juvenile individuals. Low genetic diversity was found with both markers, associated with a high differentiation of the Brejo de Baturité population in relation to the others-suggesting their isolation at different points in time, probably during the Pleistocene. Actions directed towards increasing the genetic diversity of these populations will be needed, such as planting seedlings with high genetic variability-but the high degrees of differentiation observed between the populations must be taken into account.
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http://dx.doi.org/10.1007/s10709-014-9809-yDOI Listing
February 2015

Temporal genetic structure of major dengue vector Aedes aegypti from Manaus, Amazonas, Brazil.

Acta Trop 2014 Jun 11;134:80-8. Epub 2014 Mar 11.

Programa de Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Instituto Nacional Pesquisas da Amazônia, Manaus CEP 69.067-375, Amazonas, Brazil; Laboratório de Genética de Populações e Evolução de Mosquitos Vetores de Malária e Dengue, Instituto Nacional de Pesquisas da Amazônia, Manaus CEP 69.067-375, Amazonas, Brazil. Electronic address:

In recent years, high levels of Aedes aegypti infestation and several dengue outbreaks with fatal outcome cases have been reported in Manaus, State of Amazonas, Brazil. This situation made it important to understand the genetic structure and gene flow patterns among the populations of this vector in Manaus, vital pieces of information for their management and development of new control strategies. In this study, we used nine microsatellite loci to examine the effect of seasonality on the genetic structure and gene flow patterns in Ae. aegypti populations from four urban neighborhoods of Manaus, collected during the two main rainy and dry seasons. All loci were polymorphic in the eight samples from the two seasons, with a total of 41 alleles. The genetic structure analyses of the samples from the rainy season revealed genetic homogeneity and extensive gene flow, a result consistent with the abundance of breeding sites for this vector. However, the samples from the dry season were significantly structured, due to a reduction of Ne in two (Praça 14 de Janeiro and Cidade Nova) of the four samples analyzed, and this was the primary factor influencing structure during the dry season. Genetic bottleneck analyses suggested that the Ae. aegypti populations from Manaus are being maintained continuously throughout the year, with seasonal reduction rather than severe bottleneck or extinction, corroborating previous reports. These findings are of extremely great importance for designing new dengue control strategies in Manaus.
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http://dx.doi.org/10.1016/j.actatropica.2014.02.014DOI Listing
June 2014

Permanent genetic resources added to Molecular Ecology Resources Database 1 February 2011-31 March 2011.

Mol Ecol Resour 2011 Jul 31;11(4):757-8. Epub 2011 May 31.

Molecular Ecology Resources Editorial Office, 6270 University Blvd, Vancouver, BC V6T 1Z4, Canada.

This article documents the addition of 111 microsatellite marker loci to the Molecular Ecology Resources Database. Loci were developed for the following species: Acipenser oxyrinchus desotoi, Anopheles nuneztovari sensu lato, Asellus aquaticus, Calopteryx splendens, Calopteryx virgo, Centaurea aspera, Centaurea seridis, Chilina dombeyana, Proctoeces cf. lintoni and Pyrenophora teres f. teres.
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http://dx.doi.org/10.1111/j.1755-0998.2011.03028.xDOI Listing
July 2011
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