Skin breaking strength in chickens: comparisons among genetic combinations

Area of Science:

• Animal Science
• Genetics
• Poultry Science

Background:

• Divergent selection for juvenile body weight in chickens is a common practice.
• Skin strength is an important factor in poultry meat quality and processing.
• Understanding the genetic basis of skin properties can inform breeding strategies.

Purpose of the Study:

• To investigate the effect of divergent selection for juvenile body weight on chicken skin breaking strength.
• To analyze the genetic components influencing skin breaking strength in different chicken generations and crosses.

Main Methods:

• Skin breaking strength was measured in chickens from high (H) and low (L) juvenile body weight lines.
• Analysis included F1 reciprocal crosses (HL and LH) and an F2 generation.
• Comparisons were made between skin from breast and thigh areas.

Main Results:

• Skin from the breast consistently showed higher breaking strength than thigh skin across all groups.
• The low (LL) line exhibited the lowest skin breaking strength.
• High (HH) and LH cross lines displayed the greatest skin breaking strength, with intermediate strength in HL and F2 generations.

Conclusions:

• Divergent selection for juvenile body weight significantly influences chicken skin breaking strength.
• Positive heterosis for skin breaking strength was observed, suggesting additive and possibly dominant genetic effects.
• Genetic factors related to body weight selection play a crucial role in determining skin integrity in chickens.