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Breed and holding period
What is the effect of breed and holding period on egg quality characteristics of chicken?
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13 Replies
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Egg size, weight, shell thickness, color, nutritional value.
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Effects of breed on egg quality:
Egg size and weight, shell quality, yolk colour and quality, albumen quality
Effect of holding period on egg quality:
Albumen thinning, weight loss, air cell enlargement, pH increase, yolk flattening
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Yes
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The effect of breed and holding period on egg quality characteristics in chickens can be significant, and both factors can interact in complex ways. Here’s a breakdown of their individual and combined impacts:
<b style=”letter-spacing: 0.24px;”>. Effect of Breed on Egg Quality Characteristics
Different chicken breeds (e.g., White Leghorn, Rhode Island Red, ISA Brown) exhibit varying egg quality traits due to genetic differences:
- Egg Weight & Size: Larger breeds (e.g., dual-purpose breeds) generally produce larger eggs than lighter layer breeds.
- Shell Quality: Some breeds produce eggs with thicker shells (better protection and shelf life), while others may have more fragile shells.
- Albumen Quality (Haugh Unit): High-performing layer breeds usually have better albumen quality, especially early in the laying cycle.
- Yolk Color & Composition: Breed influences pigmentation and yolk nutrient profile due to differences in metabolism and feed utilization.
- Shell Color: A breed-specific trait (e.g., brown vs. white shells).
- <b style=”letter-spacing: 0.24px;”>2. Effect of Holding Period (Storage Time) on Egg Quality
The longer eggs are stored, the more their internal quality deteriorates, regardless of breed:
- Albumen Quality: Haugh Unit decreases over time due to thinning of the albumen.
- Weight Loss: Eggs lose moisture and CO₂ through pores in the shell, leading to weight loss.
- Air Cell Size: Increases with time as the egg loses internal moisture.
- pH Changes: Albumen and yolk pH rise, impacting functional properties.
- Shell Strength: Not affected much, but handling during storage can cause cracks.<b style=”letter-spacing: 0.24px;”>3. Combined Effect of Breed and Holding Period
- Interaction: Some breeds may maintain internal quality better over time due to thicker shells or denser albumen (slower CO₂ and moisture loss).
- Implication: Choosing the right breed can help maintain egg quality during extended storage or transport, especially in warmer climates or less controlled environments.
- <b style=”letter-spacing: 0.24px;”>Practical Application
- For commercial egg production, selecting high-performance breeds with good shell and internal quality, combined with proper storage (cool, humid conditions), can maximize shelf life and consumer satisfaction.
- Breeds that retain quality better over time can reduce wastage and improve profitability.
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Excellent
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There are six main factors affecting internal egg quality: disease, egg age, temperature, humidity, handling, and storage
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There were significant difference among the breeds and holding period for all the egg quality traits except egg width. Breed and holding period interactions were significant for egg length, shape index, albumen height and Haugh unit but not for other traits.
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The breed and holding period significantly influence egg quality characteristics in chickens. For instance, breeds like White Leghorn tend to produce eggs with higher weight, breaking strength, and shell thickness compared to others
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There were significant difference among the breeds and holding period for all the egg quality traits except egg width. Breed and holding period interactions were significant for egg length, shape index, albumen height and Haugh unit but not for other traits.
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Nice
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Noted
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Breed determines holding capacity of birds internally,yolk colour,shanks and also egg shell.
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Both chicken breed and holding period <mark>significantly influence egg quality characteristics</mark>, with different breeds exhibiting varying traits and longer holding periods affecting albumen height, Haugh unit, and other quality aspects.
Here’s a more detailed explanation:
Effect of Breed:
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Variations in Egg Quality:
Different chicken breeds lay eggs with varying characteristics, including shell color, egg size, and internal quality.
Shell Quality:
Some breeds are known for producing eggs with thicker or stronger shells, while others may have thinner shells.
Internal Quality:
Breed can also influence the internal quality of eggs, such as albumen height, yolk color, and Haugh unit (a measure of albumen quality).
Age of Breeder:
The age of the breeder hen also plays a role, with eggs from younger hens tending to have higher albumen height and Haugh unit values compared to those from older breeders.
Effect of Holding Period (Storage Time):
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Albumen Quality:
Longer holding periods lead to a decrease in albumen height and Haugh unit values, indicating a decline in albumen quality.
Egg Weight Loss:
Eggs tend to lose weight during storage, primarily due to a loss in albumen.
Yolk and Albumen pH:
Storage can also cause changes in yolk and albumen pH, with albumen pH increasing over time.
Air Cell Size:
The air cell size within the egg also increases with storage, as the egg loses moisture.
Nutritive Value:
The longer the egg is stored, the lower its nutritive value tends to be.
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