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

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Author(s): J. Gosalvez | F. Crespo | J.L. Vega-Pla | C. López-Fernández | E.I. Cortés-Gutiérrez | R. Mezzanotte

Journal: European Journal of Histochemistry
ISSN 1121-760X

Volume: 54;
Issue: 1;
Start page: e2;
Date: 2010;
Original page

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

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.
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