Confirmation of quantitative trait loci affecting fatness in chickens

D.G.J. Jennen, A.L.J. Vereijken, H. Bovenhuis, R.P.M.A. Crooijmans, J.J. van der Poel, M.A.M. Groenen

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40 Citations (Scopus)

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
Original languageEnglish
Pages (from-to)215-228
JournalGenetics, Selection, Evolution
Volume37
Issue number2
DOIs
Publication statusPublished - 2005

Keywords

  • advanced intercross lines
  • whole genome scan
  • affecting body-weight
  • composition maps
  • carcass traits
  • milk-yield
  • qtl
  • growth
  • population
  • broilers

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