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Genetics Selection Evolution

Open Access

A new reciprocal translocation in a subfertile bull

  • Alain Ducos1Email author,
  • Pascal Dumont2,
  • Anne Séguéla1,
  • Alain Pinton1,
  • Hélène Berland1,
  • Corinne Brun-Baronnat1,
  • Aafke Darré3,
  • Brigitte Marquant-Le Guienne2,
  • Patrice Humblot2,
  • Didier Boichard4 and
  • Roland Darré1
Genetics Selection Evolution200032:589

Received: 27 April 2000

Accepted: 19 July 2000

Published: 15 November 2000


Three bulls of the Montbéliarde breed that exhibited fertility rates lower than 30% following more than 400 artificial inseminations were examined. Semen quality (sperm motility and morphology) from these bulls was normal. Fertilizing ability estimated from in vitro embryo production results was studied for two of them. In vitro production rate was very low for one bull (A) and normal for the other (B). Cytogenetic analyses were carried out on the three bulls using chromosome banding techniques. These analyses revealed a reciprocal translocation (12;17)(q22;q14) in bull B. Based on family analyses, the hypothesis of a de novo origin of this rearrangement is proposed.


cattlechromosome abnormalityfertilitysemen qualitycytogenetics

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Authors’ Affiliations

Unité mixte de recherches ENVT-INRA de cytogénétique des populations animales, Toulouse Cedex 3, France
Union nationale des coopératives d'élevage et d'insémination artificielle (U.N.C.E.I.A.), Maisons Alfort Cedex, France
ENFA, Castanet-Tolosan Cedex 3, France
SGQA, Institut national de la recherche agronomique, Jouy-en-Josas Cedex, France


© INRA, EDP Sciences 2000