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Chromosomal control of pig populations in France: 2002–2006 survey

  • Alain Ducos
  • Hélène-Marie Berland
  • Nathalie Bonnet
  • Anne Calgaro
  • Sébastien Billoux
  • Nicolas Mary
  • Amélie Garnier-Bonnet
  • Roland Darré
  • Alain Pinton
Open Access
Research

Abstract

The chromosomal control of pig populations has been widely developed in France over the last ten years. By December 31st, 2006, 13 765 individuals had been karyotyped in our laboratory, 62% of these since 2002. Ninety percent were young purebred boars controlled before service in artificial insemination centres, and 3% were hypoprolific boars. So far, 102 constitutional structural chromosomal rearrangements (67 since 2002) have been described. Fifty-six were reciprocal translocations and 8 peri- or paracentric inversions. For the first time since the beginning of the programme and after more than 11 000 pigs had been karyotyped, one Robertsonian translocation was identified in 2005 and two others in 2006. The estimated prevalence of balanced structural chromosomal rearrangements in a sample of more than 7700 young boars controlled before service was 0.47%. Twenty-one of the 67 rearrangements described since 2002 were identified in hypoprolific boars. All were reciprocal translocations. Twelve mosaics (XX/XY in 11 individuals, XY/XXY in one individual) were also diagnosed. Two corresponded to hypoprolific boars, and three to intersexed animals. The results presented in this communication would justify an intensification of the chromosomal control of French and, on a broader scale, European and North-American pig populations.

Keywords

chromosome translocation inversion pig reproductive performance 

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Copyright information

© INRA, EDP Sciences 2007

Authors and Affiliations

  • Alain Ducos
    • 1
  • Hélène-Marie Berland
    • 1
  • Nathalie Bonnet
    • 1
  • Anne Calgaro
    • 1
  • Sébastien Billoux
    • 1
  • Nicolas Mary
    • 1
  • Amélie Garnier-Bonnet
    • 1
  • Roland Darré
    • 1
  • Alain Pinton
    • 1
  1. 1.UMR INRA-ENVT 444 Génétique cellulaireÉcole nationale vétérinaire de ToulouseToulouse cedex 3France

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