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Genetics Selection Evolution

Open Access

Confirmation of quantitative trait loci affecting fatness in chickens

  • Danyel GJ Jennen1, 2Email author,
  • Addie LJ Vereijken3,
  • Henk Bovenhuis1,
  • Richard MPA Crooijmans1,
  • Jan J van der Poel1 and
  • Martien AM Groenen1
Genetics Selection Evolution200537:215

Received: 8 September 2003

Accepted: 16 August 2004

Published: 15 March 2005


In this report we describe the analysis of an advanced intercross line (AIL) to confirm the quantitative trait locus (QTL) regions found for fatness traits in a previous study. QTL analysis was performed on chromosomes 1, 3, 4, 15, 18, and 27. The AIL was created by random intercrossing in each generation from generation 2 (G2) onwards until generation 9 (G9) was reached. QTL for abdominal fat weight (AFW) and/or percentage abdominal fat (AF%) on chromosomes 1, 3 and 27 were confirmed in the G9 population. In addition, evidence for QTL for body weight at the age of 5 (BW5) and 7 (BW7) weeks and for the percentage of intramuscular fat (IF%) were found on chromosomes 1, 3, 15, and 27. Significant evidence for QTL was detected on chromosome 1 for BW5 and BW7. Suggestive evidence was found on chromosome 1 for AFW, AF% and IF%, on chromosome 15 for BW5, and on chromosome 27 for AF% and IF%. Furthermore, evidence on the chromosome-wise level was found on chromosome 3 for AFW, AF%, and BW7 and on chromosome 27 for BW5. For chromosomes 4 and 18, test statistics did not exceed the significance threshold.


quantitative trait lociadvanced intercross linechickenfatness traits

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Authors’ Affiliations

Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, Wageningen University, Wageningen, The Netherlands
Institute of Animal Breeding Science, University Bonn, Bonn, Germany
Nutreco, Breeding Research Centre, Boxmeer, The Netherlands


© INRA, EDP Sciences 2005