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COMPARATIVE STUDIES ON THE EGG QUALITY TRAITS OF WHITE LEGHORN, AUSTRO RED AND KALINGA BROWN BREEDS OF CHICKEN

KrishiKosh

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Title COMPARATIVE STUDIES ON THE EGG QUALITY TRAITS OF WHITE LEGHORN, AUSTRO RED AND KALINGA BROWN BREEDS OF CHICKEN
 
Creator NEGI, PRITI
 
Contributor Das, K.
 
Description Egg quality is an important factor which affects the consumer preference and economic returns from laying birds. Egg quality has been defined by Stadelman (1977) as the characteristics of an egg that affect its acceptability to the consumer. The appearance of the eggs as influenced by severity of defects is important for consumer appeal (Jacqueline et al., 2000). Egg quality is the more important price contributing factor in table and hatching eggs (Monira et al., 2003). Therefore, the economic success of a laying flock solely depends on the total number of quality eggs produced. Quality of chicken eggs may vary according to breed/strains, rearing temperature, relative humidity, season, nutrition and management effects on egg quality. The present study was undertaken to assess the egg quality characteristics of three breeds namely White Leghorn, Austro Red and Kalinga Brown in two different seasons namely summer and rainy season. The breeds were maintained at Government Poultry Farm, Durg (C.G.) in deep litter system which were of same age group that is 30-35 weeks. More than fifty eggs from each breed were studied to estimate the egg quality traits. The overall mean of egg weight, egg volume, shape index, yolk index, albumen index, Haugh Unit, yolk weight, albumen weight, shell weight, shell thickness, shell weight per unit surface area, shell percentage, yolk percentage and albumen percentage ignoring breed and season were 51.81±0.28g; 47.49±0.32; 76.52±0.20; 0.449±2.49; 0.054±0.67; 73.70±0.41; 14.51±0.12g; 31.11±0.21g; 5.69±0.04g; 0.31±0.002mm; 0.101±0.002g/sqcm; 10.99±0.06; 28.62±0.16; and 60.38±0.20 respectively. In White Leghorn and Austro Red shape index, albumen index, Haugh Unit and shell thickness were highest. Egg weight and egg volume were highest for Kalinga Brown. Yolk percentage was highest in Austro Red and Kalinga Brown whereas low in White Leghorn. Practically there were no differences among breeds for egg weight, yolk index, albumen weight, shell weight, shell weight per unit surface area, shell percentage and albumen percentage. Egg weight, albumen index, Haugh Unit, yolk weight, albumen weight, shell weight, shell percentage and yolk percentage were higher in rainy season and the reverse trend was observed for shell thickness and albumen percentage in summer season. No significant differences between the seasons with regard to shape index was observed. Highest incidence of blood spots were observed in Austro Red as compared to Kalinga Brown in both season whereas no blood spots were found in White Leghorn in two different seasons. Correlations are of the interest to the breeder since they permit prediction of direction and magnitude of change in the dependent traits as a correlated response to direct selection for the principle trait. If the genetic association of any trait that can be easily measured is established with other internal egg quality traits then it can be chosen as an established selection criterion for improving the internal egg quality. The correlation of egg weight and egg volume with yolk weight, albumen weight and shell weight were positive while negative with shell thickness, shell percentage, yolk percentage, albumen percentage and shape index in all the three breeds. Albumen index was positively correlated with Haugh Unit while Haugh Unit negatively correlated with shell thickness and albumen percentage.
 
Date 2016-08-08T12:10:46Z
2016-08-08T12:10:46Z
2008
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/71479
 
Language en
 
Format application/pdf
 
Publisher Chhattisgarh Kamdhenu Vishwavidyalaya, Durg (C.G.)