Effect of Selection for Litter Size Variability on Growth, Carcass and Meat Quality in Rabbits

Area of Science:

• Animal Science
• Genetics
• Meat Science

Background:

• Litter size variability is a key factor in rabbit production.
• Selection for reduced variability may impact growth and meat characteristics.

Purpose of the Study:

• To evaluate the effects of selecting for reduced litter size variability on rabbit growth, carcass traits, and meat quality.
• To compare a line selected to reduce litter size variability (HO) with a line selected to increase it (HE).

Main Methods:

• Two divergent rabbit lines (HO and HE) were compared.
• Animals were fed a standard diet under controlled conditions.
• Growth rate, carcass traits, meat pH, color (L*), mineral content (Ca), and fatty acid profiles were analyzed.

Main Results:

• The HO line exhibited higher growth rates post-weaning despite lower initial weight.
• Carcass weight and composition were comparable between lines.
• The HO line showed increased meat lightness (L*), higher calcium and protein content, and reduced saturated fatty acids.

Conclusions:

• Selection for reduced litter size variability positively influences rabbit growth and meat nutritional profile.
• This strategy enhances protein and calcium content and decreases saturated fats without adverse effects on growth rate or carcass traits.