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Related Experiment Videos

Detection and localization of quantitative trait loci affecting fatness in broilers.

D G J Jennen1, A L J Vereijken, H Bovenhuis

  • 1Wageningen Institute of Animal Sciences, Animal Breeding and Genetics Group, Wageningen University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands. danyel.jennen@wur.nl

Poultry Science
|March 31, 2004
PubMed
Summary

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Researchers identified quantitative trait loci (QTL) influencing fatness in chickens. This study mapped significant QTL for body weight and abdominal fat percentage, aiding genetic selection for leaner poultry.

Area of Science:

  • Animal Genetics
  • Quantitative Genetics
  • Poultry Breeding

Background:

  • Broiler production focuses on optimizing growth and meat yield.
  • Genetic factors significantly influence fat deposition in chickens, impacting meat quality and production efficiency.
  • Identifying quantitative trait loci (QTL) is crucial for marker-assisted selection in broiler breeding programs.

Purpose of the Study:

  • To detect and map QTL associated with fatness traits in a three-generation broiler population.
  • To identify specific chromosomal regions linked to body weight and abdominal fat percentage.
  • To provide genetic markers for improving broiler feed efficiency and carcass composition.

Main Methods:

  • Utilized a three-generation broiler population derived from White Plymouth Rock lines.

Related Experiment Videos

  • Employed microsatellite genotyping on 410 markers across 25 chromosomes.
  • Applied across-family weighted regression interval mapping for quantitative trait loci (QTL) analysis.
  • Collected phenotypic data on body weight, abdominal fat weight, and percentage abdominal fat.

    • Main Results:

    • Identified 26 QTL in 18 regions across 12 chromosomes for the studied traits.
    • Detected two genomewise significant QTL: one for percentage abdominal fat on chromosome 1 and another for body weight on chromosome 13.
    • Found multiple suggestive QTL on chromosomes 1, 2, 4, 13, 15, and 18.

    Conclusions:

    • The study successfully localized QTL influencing fatness and body weight in chickens.
    • Findings provide valuable genetic information for selective breeding to reduce fat content in broilers.
    • Further research can utilize these QTL to develop more efficient and healthier poultry breeds.