Listar por autor "González-Tizón, Ana M."
Mostrando ítems 21-38 de 38
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Genome sizes and karyotypes in the razor clams "Ensis arcuatus" (Jeffreys, 1865) and "E. siliqua" (Linnaeus, 1758)
Fernández-Tajes, Juan; Martínez-Lage, Andrés; Freire, Ruth; Guerra, Alejandro; Méndez, Josefina; González-Tizón, Ana M. (CNRS - Station Biologique de Roscoff- ABiMS, 2008-03)[Abstract] The razor clams Ensis arcuatus and E. siliqua show a diploid DNA content of 3.85 ± 0.049 pg and 4.00 ± 0.050 pg, respectively. Both have a diploid chromosome number of 38 although their karyotypes show remarkable ... -
Heterogeneous nature and distribution of interruptions in dinucleotides may indicate the existence of biased substitutions underlying microsatellite evolution
Varela, Miguel A.; Sanmiguel, Roberto; González-Tizón, Ana M.; Martínez-Lage, Andrés (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 ... -
Isolation and characterization of 21 polymorphic microsatellite loci for the rockpool shrimp Palaemon elegans using Illumina MiSeq sequencing
González-Castellano, Inés; Perina Cedrón, Alejandra; González-Tizón, Ana M.; Torrecilla Pérez, Zeltia; Martínez-Lage, Andrés (Springer Nature, 2018-11-21)[Abstract] The rockpool shrimp Palaemon elegans is considered an important crustacean species within the European coastline fauna. This species is experiencing an ongoing geographical expansion beyond its native distribution ... -
Isolation and characterization of polymorphic microsatellite loci in the razor clam "Ensis siliqua"
Varela, Miguel A.; González-Tizón, Ana M.; Francisco Candeira, Marta; Martínez-Lage, Andrés (Wiley, 2007-03)[Abstract] Five polymorphic microsatellite loci in the razor clam Ensis siliqua are described. A collection consisting of 34 individuals from Finisterre, Spain, was analysed. Loci were isolated from the sequences of ... -
Karyological Characterization of the Endemic Iberian Rock Lizard, Iberolacerta Monticola (Squamata, Lacertidae): Insights into Sex Chromosome Evolution
Rojo Oróns, Verónica; Giovannotti, Massimo; Naveira, Horacio; Nisi Cerioni, Paola; González-Tizón, Ana M.; Caputo Barucchi, Vincenzo; Galán, Pedro; Olmo, Ettore; Martínez-Lage, Andrés (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 ... -
Karyotypes and Ag-NORs of the mussels Mytilus californianus and M. trossulus from the Pacific Canadian coast
Martínez-Lage, Andrés; González-Tizón, Ana M.; Ausió, Juan; Méndez, Josefina (Elsevier, 1997-01-01)[Abstract] The karyotypes and the nucleolus organizer regions (NORs) of “M. californianus” and “M. trossulus” from the Pacific coast are reported here for the first time. The karyotypes show seven metacentric and seven ... -
Long-term evolution of 5S ribosomal DNA seems to be driven by birth-and-death processes and selection in "Ensis" razor shells (Mollusca: Bivalvia)
Vierna Fernández, Joaquín; González-Tizón, Ana M.; Martínez-Lage, Andrés (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 ... -
Molecular and evolutionary analysis of mussel histone genes ("Mytilus" spp.): possible evidence of an "orphon origin" for H1 histone genes
Eirín-López, J.M.; González-Tizón, Ana M.; Martínez-Lage, Andrés; Méndez, Josefina (Springer Nature, 2002-09)[Abstract:] Linker histones are a divergent group of histone proteins with an independent evolutionary history in which, besides somatic subtypes, tissue- and differentiation-specific subtypes are included. In the present ... -
Molecular evolutionary characterization of the mussel "Mytilus" histone multigene family: first record of a tandemly repeated unit of five histone genes containing an H1 subtype with orphon features
Eirín-López, J.M.; Ruiz Lorenzo, María Fernanda; González-Tizón, Ana M.; Martínez-Lage, Andrés; Sánchez Rodríguez, Lucas; Méndez, Josefina (Springer Nature, 2004-02)[Abstract] The present work represents the first characterization of a clustered histone repetitive unit containing an H1 gene in a bivalve mollusk. To complete the knowledge on the evolutionary history of the histone ... -
Molecular organization and phylogenetic analysis of 5S rDNA in crustaceans of the genus "Pollicipes" reveal birth-and-death evolution and strong purifying selection
Perina Cedrón, Alejandra; Seoane Miraz, David; González-Tizón, Ana M.; Rodríguez Fariña, María Fernanda; Martínez-Lage, Andrés (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 ... -
Origin and evolution of "Mytilus" mussel satellite DNAs
Martínez-Lage, Andrés; Rodríguez Fariña, María Fernanda; González-Tizón, Ana M.; Méndez, Josefina (Canadian Science Publishing, 2005-04)[Abstract] A phylogenetic reconstruction based on the amplification of 3 satellite DNAs (stDNAs) was carried out in 1 crustacean species and 15 bivalve species of the subclass Pteriomorphia (10, subfamily Mytilinae; 1, ... -
Polyploidy in a Natural Population of Mussel, Mytilus Trossulus
González-Tizón, Ana M.; Martínez-Lage, Andrés; Ausió, Juan; Méndez, Josefina (Canadian Science Publishing, 2000-03)[Abstract] We have analyzed natural polyploidy in a population of “Mytilus trossulus” from Vancouver Island (British Columbia, Canada) by means of cytogenetic techniques. Results obtained are the first reporting on this ... -
Population genetic analysis of "Ensis directus" unveils high genetic variation in the introduced range and reveals a new species from the NW Atlantic
Vierna Fernández, Joaquín; Jensen, K. Thomas; González-Tizón, Ana M.; Martínez-Lage, Andrés (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 ... -
Species delimitation and DNA barcoding of Atlantic Ensis (Bivalvia, Pharidae)
Vierna Fernández, Joaquín; Cuperus, Joël; Martínez-Lage, Andrés; Jansen, Jeroen M.; Perina Cedrón, Alejandra; Van Pelt, Hilde; González-Tizón, Ana M. (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 ... -
Telomeric localization of the vertebrate-type hexamer repeat, (TTAGGG) ₙ, in the wedgeshell clam "Donax trunculus" and other marine invertebrate genomes
Plohl, Miroslav; Prats, Eva; Martínez-Lage, Andrés; González-Tizón, Ana M.; Méndez, Josefina; Cornudella, Luis (American Society for Biochemistry and Molecular Biology, 2002-05-31)[Abstract]: The hexamer repeat sequence (TTAGGG) n, found at the ends of all vertebrate chromosomes, was previously identified as the main building element of one member of aHindIII satellite DNA family characterized in ... -
Temporal genetic variation of microsatellite markers in the razor clam "Ensis arcuatus" (Bivalvia: Pharidae)
Varela, Miguel A.; Martínez-Lage, Andrés; González-Tizón, Ana M. (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, ... -
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
Vizoso, Miguel; Vierna Fernández, Joaquín; González-Tizón, Ana M.; Martínez-Lage, Andrés (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)
Vierna Fernández, Joaquín; Jensen, K. Thomas; Martínez-Lage, Andrés; González-Tizón, Ana M. (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 ...