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Relationship between Bone Stability and Egg Production in Genetically Divergent Chicken Layer Lines
Simon Jansen1, Ulrich Baulain1, Christin Habig1
1Institute of Farm Animal Genetics, Friedrich-Loeffler-Institut, 31535 Neustadt, Germany.
Animals : an Open Access Journal From MDPI
|May 20, 2020
Summary
Bone mineral density (BMD) is crucial for bone stability in laying hens, not high egg production. Genetics plays a key role in improving bone strength, addressing skeletal disorders in the egg industry.
Area of Science:
- Animal Science
- Poultry Science
- Veterinary Medicine
Background:
- Skeletal disorders significantly impair animal welfare in the egg production industry.
- Reduced bone stability in laying hens is often linked to selective breeding for higher egg production.
Purpose of the Study:
- To analyze the relationship between bone stability traits and egg production in laying hens.
- To investigate phenotypic variability in bone characteristics across different layer lines.
Main Methods:
- Evaluated four purebred layer lines with varying origins and performance levels.
- Collected data on production parameters, bone morphometry, bone mineral density (BMD), and bone breaking strength (BBS) of tibiotarsus and humerus.
- Employed multifactorial models and regression analyses.
Main Results:
- Bone mineral density (BMD) was identified as critically important for bone stability.
- For the tibiotarsus, morphometric parameters and bone weight were associated with bone breaking strength (BBS).
- No significant effect of total eggshell production on BBS or BMD was detected within the studied chicken lines.
Conclusions:
- High egg yield does not inherently pose a risk to bone health in laying hens.
- Genetic parameters highlight the importance of genetics in enhancing bone strength and mitigating osteoporosis in layers.
- Targeting BMD is essential for improving skeletal integrity and animal welfare in the egg industry.
Keywords:
animal welfarebone breaking strengthbone mineral densityfractureslaying henslaying performanceosteoporosisphylogenyMore Related Videos
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