Shared Y chromosome repetitive DNA sequences in stallion and donkey as visualized using whole-genomic comparative hybridization

J. Gosalvez, F. Crespo, J.L. Vega-Pla, C. López-Fernández, E.I. Cortés-Gutiérrez, R. Mezzanotte
  • J. Gosalvez
    Department of Biology, Genetics Unit, Universidad Autonoma de Madrid (UAM), Madrid, Italy | jaime.gosalvez@uam.es
  • F. Crespo
    Veterinary Services of the Spanish Army (FESCCR- Ministerio de Defensa), Avila,, Spain
  • J.L. Vega-Pla
    Veterinary Services of the Spanish Army (FESCCR- Ministerio de Defensa), Avila,, Spain
  • C. López-Fernández
    Department of Biology, Genetics Unit, Universidad Autonoma de Madrid (UAM), Madrid,, Spain
  • E.I. Cortés-Gutiérrez
    Department of Genetics, Northwest Research Centre of Biology, Mexican National Institute for Health, Monterrey,, Mexico
  • R. Mezzanotte
    Department of Biomedical Sciences and Biotechnology. Section of Genetics. Cittadella Universitaria, Monserrato, Cagliari, Italy

Abstract

The genome of stallion (Spanish breed) and donkey (Spanish endemic Zamorano-Leonés) were compared using whole comparative genomic in situ hybridization (W-CGH) technique, with special reference to the variability observed in the Y chromosome. Results show that these diverging genomes still share some highly repetitive DNA families localized in pericentromeric regions and, in the particular case of the Y chromosome, a sub-family of highly repeated DNA sequences, greatly expanded in the donkey genome, accounts for a large part of the chromatin in the stallion Y chromosome.

Keywords

Mammalian genome. Mammalian cytogenetics. Genome evolution. Comparative genomics.

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Submitted: 2009-12-18 09:20:22
Published: 2010-01-28 11:56:51
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Copyright (c) 2010 J. Gosalvez, F. Crespo, J.L. Vega-Pla, C. López-Fernández, E.I. Cortés-Gutiérrez, R. Mezzanotte

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