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Genetic relationship between leg problems and bone quality traits in a random mating broiler population
F González-Cerón1, R Rekaya2, S E Aggrey3
1NutriGenomics Laboratory, Department of Poultry Science, University of Georgia, Athens, GA 30602.
Poultry Science
|June 20, 2015
Summary
Genetic links between broiler leg problems (valgus, varus, tibial dyschondroplasia) and bone quality are weak. Management strategies are more effective than genetic selection for improving leg health in poultry.
Area of Science:
- Animal Genetics
- Poultry Science
- Bone Biology
Background:
- Leg problems like valgus (VL), varus (VR), and tibial dyschondroplasia (TD) are significant welfare concerns in broiler chickens.
- Bone quality traits are crucial for structural integrity and overall health in poultry.
Purpose of the Study:
- To investigate the genetic associations between common leg problems and various bone quality traits in a broiler population.
- To determine if genetic improvement can be a viable strategy for reducing leg abnormalities.
Main Methods:
- Utilized a random mating broiler control population.
- Employed a threshold-linear mixed model with a Bayesian approach for joint trait analysis.
- Assessed genetic correlations between leg disorders (VL, VR, TD) and bone quality indicators (shank and tibia measurements, density, strength, mineral content, ash content).
Main Results:
- Genetic correlations between leg problems and bone quality traits were weak, ranging from -0.06 to 0.11.
- This indicates a limited direct genetic relationship between the studied leg conditions and bone quality parameters.
- The findings suggest that genetic selection may not be the most efficient method for mitigating leg issues.
Conclusions:
- Genetic improvement strategies show limited potential for alleviating leg problems in broilers.
- Management strategies are likely to be more effective in addressing and reducing the incidence of leg disorders.
- Further research into environmental and management factors influencing leg health is warranted.
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