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A new reciprocal translocation in a subfertile bull

Author(s): Ducos Alain | Dumont Pascal | Séguéla Anne | Pinton Alain | Berland Hélène | Brun-Baronnat Corinne | Darré Aafke | Guienne Brigitte | Humblot Patrice | Boichard Didier | Darré Roland

Journal: Genetics Selection Evolution
ISSN 0999-193X

Volume: 32;
Issue: 6;
Start page: 589;
Date: 2000;
Original page

Keywords: cattle | chromosome abnormality | fertility | semen quality | cytogenetics

Abstract 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.
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