Chromosome analysis in French pig and cattle populations
Abstract
For many years, chromosomal controls have been conducted on French porcine and bovine populations at the UMR GenPhySE at the Veterinary School of Toulouse. The aim of these analyses is to detect chromosomal abnormalities that could potentially cause severe reproductive problems in carrier animals or their partners. Thus, in pigs, to date, more than 52,000 purebred boars have been analyzed (2,500 analyses per year), allowing the detection of 276 original structural rearrangements (91% reciprocal translocations, 4% inversions, 1% Robertsonian translocations). Based on these results, we have been able to establish that the prevalence of balanced structural rearrangements in French porcine populations is 0.52%.
Recently, at the request of bovine selection organizations, we set up a chromosome screening (GTG banding) of young bulls before reproduction. To date, 4400 individuals have been analyzed and 2 anomalies (a tandem translocation between chromosomes BTA26 and BTA29 and a trisomy in mosaic) have been identified.