The Influence of Divergent Growth Selection on Egg Traits

Data on quality traits were obtained from eggs produced by females of two lines (high and low) representing the 22nd generation of selection for divergent growth. Significant (P < 0.05 or 0.01) differences were observed for all traits measured except chalazae position. Higher values (P < 0.01) were observed in eggs from females of the high (rapid growth) line for egg weight, yolk weight and color, percent yolk, albumen height, shell thickness and color, chalazae size, and percent of eggs with blood and meat spots. In contrast, eggs from the low-growth line had larger values for shape index (P < 0.01) and Haugh units (P < 0.05).