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Evolutionary Biology Group


Ana González Tizón

I am interested in evolution of marine species, basically on molluscs and crustaceans. My research work deals with cytogenetics, population genetics, phylogenetics and phylogeography of some of these species. I am currently in charge of a Genetics and Forensic Genetics Course. I have also given courses on History of Genetics and Human Genetics.






rofessor (Genetics)
Evolutionary Biology Group coordinator


  • A. Perina, B.M. von Reumont, A. Martínez- Lage, A.M. González-Tizón. (2014) Accessing transcriptomic data for ecologically important genes in the goose barnacle (Pollicipes pollicipes), with particular focus on cement proteins. Marine Genomics 15, 9-11.[pdf]
  • Rojo, V.; Giovannotti, M.; Naveira, H.; Nisi Cerioni, P.; González-Tizón, A.; Caputo Barucchi, V.; Galán, P.; Olmo, E. & Martínez, A. (2014): Karyological characterization of the endemic Iberian rock lizard, Iberolacerta monticola (Squamata, Lacertidae): insights into sex chromosome evolution. Cytogenetic and Genome Research, 142(1): 28-39.[pdf]
  • Joaquín Vierna, Joël Cuperus, Andrés Martínez-Lage, Jeroen M. Jansen, Alejandra Perina, Hilde Van Pelt & Ana M. González-Tizón (2013) Species delimitation and DNA barcoding of Atlantic Ensis (Bivalvia, Pharidae). Zoologica Scripta. doi:10.1111/zsc12038 [pdf] [supplementary material]
  • Ana M. González-Tizón, Verónica Rojo, Joaquín Vierna,  K. Thomas Jensen, Emilie Egea, Andrés Martínez-Lage (2013) Cytogenetic characterisation of the razor shells Ensis directus (Conrad, 1843) and E. minor (Chenu, 1843) (Mollusca: Bivalvia). Helgol Mar Res 67:73-82[pdf]
  • Joaquín Vierna, K. Thomas Jensen, Ana M. González-Tizón, Andrés Martínez-Lage (2012) Population genetic analysis of Ensis directus unveils high genetic variation in the introduced range and reveals a new species from the NW Atlantic. Mar Biol 159:2209-2227 [pdf]
  • Alejandra Perina, David Seoane, Ana M González-Tizón, Fernanda Rodríguez-Fariña and Andrés Martínez-Lage: Molecular organization and phylogenetic analysis of 5S rDNA in crustaceans of the genus Pollicipes reveal birth-death evolution and strong purifying selection. BMC Evolutionary Biology 2011, 11:304. [pdf]
  • Varela MA, Martínez-Lage A, González-Tizón AM (2011) Genetic heterogeneity in natural beds of the razor clam Ensis siliqua revealed by microsatellites. Journal of the Marine Biological Association of the United Kingdom 92:171-177.[pdf]
  • Miguel Vizoso; Joaquín Vierna; Ana M. González-Tizón; Andrés Martínez-Lage (2011) 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. Journal of Heredity 102:433-447 [pdf] [supplementary material]
  • Joaquín Vierna, K. Thomas Jensen, Andrés Martínez-Lage, and Ana. M. González-Tizón. The linked units of 5S rDNA and U1 snDNA of razor shells (Mollusca: Bivalvia: Pharidae). Heredity 1-16 1-16 doi:10.1038/hdy.2010.174 [pdf] [supplementary material]
  • Joaquín Vierna, Andrés Martínez-Lage, and Ana M. González-Tizón (2010) Analysis of ITS1 and ITS2 sequences in Ensis razor shells: suitability as molecular markers at the population and species level, and evolution of these ribosomal DNA spacers.  Genome 53:23-34.[pdf]
  • Miguel A. Varela, Andrés Martínez-Lage, Ana M. González-Tizón (2009) Temporal genetic variation of microsatellite markers in the razor clam Ensis arcuatus (Bivalvia: Pharidae). Journal of the Marine Biological Association of the United Kingdom 89:1703-1707 [pdf]
  • Joaquín Vierna, Ana M. González-Tizón and Andrés Martínez-Lage (2009) Long-Term evolution of 5S ribosomal DNA seems to be driven by birth-and-death processes and election in Ensis razor shells (Mollusca: Bivalvia) Biochemical Genetics 47:635-644.[pdf]
  • González-Tizón A M, Fernández-Moreno M, Vasconcelos P, Gaspar M B and Martínez-Lage A (2008) Genetic diversity in fishery-exploited populations of the banded murex (Hexaplex trunculus) from the southern Iberian Peninsula. Journal of Experimental Marine Biology and Ecology doi:10.1016/j.jembe.2008.06.013 [pdf]
  • Varela M A, Sanmiguel R, González-Tizón A and Martínez-Lage A (2008) Heterogeneous Nature and Distribution of Interruptions in Dinucleotides May Indicate the Existence of Biased Substitutions Underlying Microsatellite Evolution. Journal of Molecular Evolution 66: 575–580. [pdf]
  • Fernández-Tajes J, Martínez-Lage A, Freire R, Guerra A, Méndez J and González-Tizón A M (2008) Genome sizes and karyotypes in the razor clams Ensis arcuatus (Jeffreys, 1865) and E. siliqua (Linnaeus, 1758). Cahiers de Biologie Marine 49:1 79-85. [pdf]
  • Fernández-Tajes J, Gaspar M Martínez-Patiño D, McDonough N, Roberts D, González-Tizón A, Martínez-Lage A and Méndez J (2007) Genetic variation of the razor clam Ensis siliqua (Jeffreys, 1875) along the European coast based on random amplified polymorphic DNA markers. Aquaculture Research 38: 1205-1212. [pdf]
  • Varela M A, González-Tizón A, Mariñas L and Martínez-Lage A (2007) Genetic divergence detected by ISSR markers and characterisation of microsatellite regions in Mytilus mussels. Biochemical Genetics 45: 565–578. [pdf]
  • Francisco-Candeira M, González-Tizón A, Varela M A and Martínez-Lage A (2007) Development of microsatellite markers in the razor clam Solen marginatus (Bivalvia: Solenidae). Journal of the Marine Biological Association of the United Kingdom 87: 977–978. [pdf]
  • Varela M A, González-Tizón A, Francisco-Candeira M and Martínez-Lage A (2007) Isolation and characterization of polymorphic microsatellite loci in the razor clam Ensis siliqua. Molecular Ecology Notes 7: 221-222. [pdf]
  • Martínez-Lage A, Rodríguez F, González-Tizón A and Méndez J (2005) Origin and evolution of Mytilus mussel satellite DNAs. Genome 48: 247-256. [pdf]
  • Eirín-López J M, Ruíz M F, González-Tizón A, Martínez-Lage A, Ausió J, Sánchez L and Méndez J (2005) Common Evolutionary Origin and Birth-and-Death Process in the Replication-Independent Histone H1 Isoforms from Vertebrate and Invertebrate Genomes. Journal of Molecular Evolution 61: 398-407. [pdf]
  • Martínez-Lage, A y González-Tizón, A (2004) Aplicaciones de la bioinformática en la elaboración de filogenias moleculares 53-81. En Bioinformática, editado por la Fundación Alfredo Brañas. Santiago de Compostela. [pdf]
  • Eirín-López J M, Ruíz M F, González-Tizón A, Martínez-Lage A, Sánchez L and Méndez J (2004) Molecular evolutionary characterization of mussel Mytilus histone multigene family: First record of a tandemly repeated unit of five histone genes containing an H1 subtype with “orphon” features. Journal of Molecular Evolution 58: 131 -144. [pdf]
  • Eirín-López J M, González-Tizón A, Martínez-Lage A and Méndez (2004) Birth-and-dead evolution with strong purifying selection in the histone H1 multigene family and the origin of orphon H1 genes. Molecular Biology and Evolution 21: 1992-2003. [pdf]
  • Fernández-Tajes J, González-Tizón A, Martínez A and Méndez J (2003) Cytogenetics in a razor clam Solen marginatus (Mollusca: Bivalvia: Solenidae). Cytogenetics and Genome Research 101: 43 -46. [pdf]
  • Eirín-López J M, González-Tizón A, Martínez-Lage A, Sánchez L and Méndez J (2002) Molecular and evolutionary analysis of mussels histone genes (Mytilus spp.): possible evidence of an “orphon origin” for H1 histone genes. Journal of Molecular Evolution 55: 272 -283. [pdf]
  • Martínez-Lage A, Rodríguez F, González-Tizón A, Prats E, Cornudella L and Méndez J (2002) Comparative analysis of different satellite DNAs in four Mytilus species. Genome 45: 922 -929. [pdf]
  • Plohl M, Prats E, Martínez-Lage A, González-Tizón A, Méndez J and Cornudella L (2002) Telomeric location of the vertebrate-type hexameric repeat, (TTAGGG)n, in the genome of the wedgeshell clam Donax trunculus and other marine invertebrate genomes. Journal of Biological Chemistry 277: 19839-19846. [pdf]
  • Rego I, Martínez A, González A, Vietes J, Leira F and Méndez J (2002) PCR technique for identification of mussel species. Journal of Agricultural and Food Chemistry 50: 1780 -1784. [pdf]
  • Martínez A, Mariñas L, González-Tizón A and Méndez J (2002) Cytogenetic characterization of Donax trunculus (Bivalvia: Donacidae) by means of karyotyping, fluorochrome banding, and fluorescent in situ hybridization. Journal of Molluscan Studies 68: 393 -396. [pdf]
  • González-Tizón A, Martínez-Lage A, Ausió J and Méndez J (2000) Polyploidy in a natural population of mussel, Mytilus trossulus. Genome 43 : 409-411. [pdf]
  • González-Tizón A, Martínez-Lage A, Rego I, Ausió J and Méndez J (2000) DNA content, karyotypes and chromosomal location of 18S-5.8S-28S ribosomal loci in some species of bivalve mollusc from the Pacific Canadian coast. Genome 43: 1065-1072. [pdf]
  • Martínez-Lage A, González-Tizón A, Ausió J and Méndez J (1997) Karyotypes and Ag-NORs of the mussels Mytilus californianus and M. trossulus from the Pacific Canadian Coast. Aquaculture 153: 239-249. [pdf]
  • Martínez-Lage A, González-Tizón A and Méndez J (1996) Chromosome differences between European mussel populations (genus Mytilus). Caryologia 49: 343-355. [pdf]
  • Martínez-Lage A, González-Tizón A and Méndez J (1995) Chromosomal markers in three species of genus Mytilus (Mollusca: Bivalvia). Heredity 74: 369-375. [pdf]
  • Martínez-Lage A, González-Tizón A and Méndez J (1994) Characterization of different chromatin types in Mytilus galloprovincialis L. after C-banding, fluorochrome and restriction endonuclease treatments. Heredity 72: 242-249. [pdf]
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