Listar GI-GIBE - Artigos por data de publicación
Mostrando ítems 21-40 de 83
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Heterogeneous nature and distribution of interruptions in dinucleotides may indicate the existence of biased substitutions underlying microsatellite evolution
(Springer Nature, 2008-06)[Abstract] Some aspects of microsatellite evolution, such as the role of base substitutions, are far from being fully understood. To examine the significance of base substitutions underlying the evolution of microsatellites ... -
Genetic diversity in fishery-exploited populations of the banded murex ("Hexaplex trunculus") from the southern Iberian Peninsula
(Elsevier, 2008-08)[Abstract] This study presents an analysis of the genetic diversity in Hexaplex trunculus from three localities of the southern Iberian Peninsula (Ria Formosa and Ria de Alvor in Portugal, and Río Piedras in Spain) using ... -
Long-term evolution of 5S ribosomal DNA seems to be driven by birth-and-death processes and selection in "Ensis" razor shells (Mollusca: Bivalvia)
(Springer Nature, 2009-10)[Abstract] A study of nucleotide sequence variation of 5S ribosomal DNA from six Ensis species revealed that several 5S ribosomal DNA variants, based on differences in their nontranscribed spacers (NTS), occur in Ensis ... -
Temporal genetic variation of microsatellite markers in the razor clam "Ensis arcuatus" (Bivalvia: Pharidae)
(Cambridge University Press, 2009-12)[Abstract] The aim of this study was to characterize new microsatellite loci in the razor clam Ensis arcuatus (Bivalvia: Pharidae) and examine the temporal genetic variability of a natural bed in Cies Islands (Galicia, ... -
Analysis of ITS1 and ITS2 sequences in "Ensis" razor shells: suitability as molecular markers at the population and species levels, and evolution of these ribosomal DNA spacers
(Canadian Science Publishing, 2010-01)[Abstract] Internal transcribed spacer 1 and 2 (ITS1 and ITS2) sequences were analysed in Ensis razor shells (Mollusca: Bivalvia: Pharidae). We aimed to (1) test ITS1 and ITS2 as molecular markers at the population level ... -
Genetic heterogeneity in natural beds of the razor clam "Ensis siliqua" revealed by microsatellites
(Cambridge University Press, 2011-06-09)[Abstract] The aim of this study was to analyse the genetic diversity and population structure in the razor clam Ensis siliqua along the European Atlantic coast taking into account their recent history of exploitation and ... -
The 5S rDNA gene family in mollusks: characterization of transcriptional regulatory regions, prediction of secondary structures, and long-term evolution, with special attention to Mytilidae mussels
(Oxford University Press, 2011-07-01)[Abstract] Several reports on the characterization of 5S ribosomal DNA (5S rDNA) in various animal groups have been published to date, but there is a lack of studies analyzing this gene family in a much broader context. ... -
The linked units of 5S rDNA and U1 snDNA of razor shells (Mollusca: Bivalvia: Pharidae)
(Nature, 2011-08)[Abstract] The linkage between 5S ribosomal DNA and other multigene families has been detected in many eukaryote lineages, but whether it provides any selective advantage remains unclear. In this work, we report the ... -
Molecular organization and phylogenetic analysis of 5S rDNA in crustaceans of the genus "Pollicipes" reveal birth-and-death evolution and strong purifying selection
(BioMed Central, 2011-10-17)[Abstract] Background: The 5S ribosomal DNA (5S rDNA) is organized in tandem arrays with repeat units that consist of a transcribing region (5S) and a variable nontranscribed spacer (NTS), in higher eukaryotes. Until ... -
Cytogenetic characterisation of the razor shells "Ensis directus" (Conrad, 1843) and "E. minor" (Chenu, 1843) (Mollusca: Bivalvia)
(Springer Nature, 2012-04-26)[Abstract] The European razor shell Ensis minor (Chenu 1843) and the American E. directus (Conrad 1843) have a diploid chromosome number of 38 and remarkable differences in their karyotypes: E. minor has four metacentric, ... -
Population genetic analysis of "Ensis directus" unveils high genetic variation in the introduced range and reveals a new species from the NW Atlantic
(Springer Nature, 2012-07-31)[Abstract] We report current genetic variation of populations of the razor shell Ensis directus (Conrad 1843) (Mollusca: Bivalvia: Pharidae) in native (North American) and introduced (European) ranges using nuclear and ... -
Systematic analysis and evolution of 5S ribosomal DNA in metazoans
(Springer Nature, 2013-07-10)[Abstract] Several studies on 5S ribosomal DNA (5S rDNA) have been focused on a subset of the following features in mostly one organism: number of copies, pseudogenes, secondary structure, promoter and terminator ... -
Species delimitation and DNA barcoding of Atlantic Ensis (Bivalvia, Pharidae)
(Wiley, 2013-09-03)[Abstract] Ensis Schumacher, 1817 razor shells occur at both sides of the Atlantic and along the Pacific coasts of tropical west America, Peru, and Chile. Many of them are marketed in various regions. However, the absence ... -
Karyological Characterization of the Endemic Iberian Rock Lizard, Iberolacerta Monticola (Squamata, Lacertidae): Insights into Sex Chromosome Evolution
(Karger, 2013-12)[Abstract] Rock lizards of the genus Iberolacerta constitute a promising model to examine the process of sex chromosome evolution, as these closely related taxa exhibit remarkable diversity in the degree of sex chromosome ... -
Accessing transcriptomic data for ecologically important genes in the goose barnacle ("Pollicipes pollicipes"), with particular focus on cement proteins
(Elsevier, 2014-03-04)[Abstract] In this study 4310 expressed sequence tags (ESTs) were used to identify potentially useful transcripts for future studies in the gooseneck barnacle Pollicipes pollicipes (Gmelin, 1789). 119 ESTs were obtained ... -
Comparative cytogenetic analysis of marine “Palaemon” species reveals a X₁X₁X₂X₂/X₁X₂Y sex chromosome system in “Palaemon elegans”
(Springer, 2017-10-12)[Abstract]: The maintenance of species and the promotion of speciation are closely related to chromosomal rearrangements throughout evolution. Decapoda represents the most species-rich order among crustaceans and, despite ... -
Toward Reliable Population Estimates of Wolves by Combining Spatial Cap-ture-Recapture Models and Non-invasive DNA Monitoring
(Springer Nature, 2018-02-01)[Abstract]: Decision-makers in wildlife policy require reliable population size estimates to justify interventions, to build acceptance and support in their decisions and, ultimately, to build trust in managing authorities. ... -
Determinants of Mercury Contamination in Viperine Snakes, Natrix Maura, in Western Europe
(Elsevier, 2018-04-03)[Abstract] The effects of Hg contamination are presumably widespread across the components of aquatic ecosystems, but investigations have been mainly focused on freshwater fish, because this biota represents a major source ... -
A Test of the Substitution–Habitat Hypothesis in Amphibians
(Wiley, 2018-05-16)[Abstract] Most examples that support the substitution-habitat hypothesis (human-made habitats act as substitutes of original habitat) deal with birds and mammals. We tested this hypothesis in 14 amphibians by using ... -
Cryptic Population Structure Reveals Low Dispersal in Iberian Wolves
(Springer Nature, 2018-09-20)[Abstract]: Highly mobile mammalian carnivores are expected to have the capability to maintain high levels of gene flow across large geographic scales. Nonetheless, surprising levels of genetic structure have been found ...