Free Access
Genet. Sel. Evol.
Volume 37, Number 2, March-April 2005
Page(s) 215 - 228
Genet. Sel. Evol. 37 (2005) 215-228
DOI: 10.1051/gse:2004045

Confirmation of quantitative trait loci affecting fatness in chickens

Danyel G.J. Jennena, b, Addie L.J. Vereijkenc, Henk Bovenhuisa, Richard M.P.A. Crooijmansa, Jan J. van der Poela and Martien A.M. Groenena

a  Animal Breeding and Genetics Group, Wageningen Institute of Animal Sciences, Wageningen University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands
b  Institute of Animal Breeding Science, University Bonn, Endenicher Allee 15, 53113 Bonn, Germany
c  Nutreco, Breeding Research Centre, P.O. Box 220, 5830 AE Boxmeer, The Netherlands

(Received 8 September 2003; accepted 16 August 2004)

Abstract - 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 (G 2) onwards until generation 9 (G 9) was reached. QTL for abdominal fat weight (AFW) and/or percentage abdominal fat (AF%) on chromosomes 1, 3 and 27 were confirmed in the G 9 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.

Key words: quantitative trait loci / advanced intercross line / chicken / fatness traits

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© INRA, EDP Sciences 2005