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Feed and reproductive efficiency differences between divergently selected lines for birthweight environmental
Nora Formoso-Rafferty1, Miguel de la Flor1, Juan Pablo Gutiérrez1
1Facultad de Veterinaria, Departamento de Producción Animal, UCM, Madrid, Spain.
Summary
Homogeneous mouse lines demonstrated robust feed efficiency and superior reproductive capacity. Selecting for trait homogeneity in livestock can enhance sustainability without compromising key production efficiencies.
Area of Science:
- Animal Science
- Genetics
- Agricultural Production
Background:
- Sustainability is crucial in modern agriculture.
- Optimizing livestock feed efficiency can impact reproductive performance.
- Homogeneity in animal traits is explored for robustness and efficiency.
Purpose of the Study:
- To compare feed and reproductive efficiency in two divergent mouse lines.
- To investigate the relationship between trait homogeneity and animal performance.
- To assess the potential of homogeneous lines for sustainable livestock breeding.
Main Methods:
- Utilized two divergent mouse lines differing in birthweight variability.
- Assessed feed efficiency using metrics like weight gain and feed intake.
- Evaluated reproductive capacity by examining parturition rates, litter size, and survival.
Main Results:
- The low variability line exhibited lower weight and feed intake but comparable feed efficiency.
- Reproductively, the low variability line showed higher performance in parturitions, litter size, and survival.
- Homogeneity was associated with robustness, maintaining feed efficiency while improving reproductive efficiency.
Conclusions:
- Low variability mouse lines offer a promising model for enhancing reproductive efficiency in livestock.
- Selecting for homogeneity can lead to more robust animals with improved sustainability.
- Balancing feed and reproductive efficiency through genetic selection is achievable.
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