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Open Access

Detection of quantitative trait loci for reproduction and production traits in Large White and French Landrace pig populations (Open Access publication)

  • Thierry Tribout1Email author,
  • Nathalie Iannuccelli2,
  • Tom Druet1,
  • Hélène Gilbert1,
  • Riquet Juliette2,
  • Gueblez Ronan3,
  • Marie-José Mercat3,
  • Jean-Pierre Bidanel1,
  • Denis Milan2 and
  • Pascale Le Roy4
Genetics Selection Evolution200840:61

https://doi.org/10.1186/1297-9686-40-1-61

Received: 17 January 2007

Accepted: 31 July 2007

Published: 15 January 2008

Abstract

A genome-wide scan was performed in Large White and French Landrace pig populations in order to identify QTL affecting reproduction and production traits. The experiment was based on a granddaughter design, including five Large White and three French Landrace half-sib families identified in the French porcine national database. A total of 239 animals (166 sons and 73 daughters of the eight male founders) distributed in eight families were genotyped for 144 microsatellite markers. The design included 51 262 animals recorded for production traits, and 53 205 litter size records were considered. Three production and three reproduction traits were analysed: average backfat thickness (US_M) and live weight (LWGT) at the end of the on-farm test, age of candidates adjusted at 100 kg live weight, total number of piglets born per litter, and numbers of stillborn (STILLp) and born alive (LIVp) piglets per litter. Ten QTL with medium to large effects were detected at a chromosome-wide significance level of 5% affecting traits US_M (on SSC2, SSC3 and SSC17), LWGT (on SSC4), STILLp (on SSC6, SSC11 and SSC14) and LIVp (on SSC7, SSC16 and SSC18). The number of heterozygous male founders varied from 1 to 3 depending on the QTL.

Keywords

quantitative trait locuspigcommercial populationproduction traitreproduction trait

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Authors’ Affiliations

(1)
INRA UR337 Station de génétique quantitative et appliquée, Jouy-en-Josas, France
(2)
INRA UR444 Laboratoire de génétique cellulaire, Castanet-Tolosan, France
(3)
IFIP Institut du Porc, La Motte au Vicomte, Le Rheu Cedex, France
(4)
INRA UMR598 Génétique animale, Rennes, France

Copyright

© INRA, EDP Sciences 2008

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