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Carcass Color in Broilers When Replacing Wheat with Corn in the Diet.

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Replacing wheat with corn in broiler feed darkens meat color and increases yellowness. Corn-based diets reduce color differences across carcass regions, especially when skin is intact.

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Area of Science:

  • Animal Science
  • Poultry Nutrition
  • Food Science

Background:

  • Dietary ingredients significantly impact broiler meat quality.
  • Understanding color distribution is crucial for broiler carcass evaluation.
  • Cereal composition, like corn vs. wheat, can influence meat coloration.

Purpose of the Study:

  • To assess the effect of substituting wheat with corn on broiler carcass color distribution.
  • To identify specific carcass regions affected by dietary corn inclusion.
  • To evaluate the influence of corn on meat color parameters (CIEL*a*b* space).

Main Methods:

  • One thousand two hundred ROSS 308 male chicks were fed either corn or wheat-based diets.
  • Color measurements were taken on 15 carcasses per treatment 24 hours post-slaughter.
  • A MINOLTA CM600d spectrocolorimeter was used to measure color at 12 carcass locations.

Main Results:

  • Broiler carcass color distribution is non-homogeneous, with significant differences between skin-on and skin-off areas.
  • Corn-based diets resulted in darker meat (increased L*) and higher yellowness (increased a*) compared to wheat-based diets.
  • Corn inclusion reduced color variation across carcass regions, particularly when skin was present, and diminished shank color differences.

Conclusions:

  • Dietary corn influences broiler meat color, leading to darker and yellower meat compared to wheat.
  • Skin plays a role in homogenizing carcass color, masking some regional differences.
  • Hue° may indicate breast color variations due to dietary changes, suggesting its potential as a quality indicator.