STUDY ON CARCASS PARAMETERS AND EGG QUALITY TRAITS OF DIFFERENT CHICKEN BREEDS AT DEBREZEIT AGRICULTURAL RESEARCH CENTER
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Date
2017-06
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Abstract
A study was conducted to evaluate egg quality traits and carcass characteristics of dual purpose breeds namely Novo color (NC), Dominant red barred (DRB), Koekoek (KK) and Lohmann brown (LB) available at DZARC station. The study lasted for 16 weeks. Egg quality measurements were taken at week 25, 27, 29, 31 and 33 with a total of 120 chickens each having two replications and at the end of the experiment carcass traits were evaluated with a total of 24. Mean values for egg weight, egg length, albumen weight and yolk weight, were significantly different (p<0.05) in dominant red barred followed by lohmann Brown . Mean values for yolk height, Haugh unit, shell weight yolk index and yolk ratio were significantly (p<0.05) higher in dominant red barred than koekoek. There was no statistically significant difference (p>0.05) in egg shape index, eggshell thickness ,shell ratio and yolk color among those breeds compared. albumin weight and albumin ratio was significantly different (P<0.05) and show fluctuating decreasing trend. The mean values for egg weight , shell weight, yolk weight ,albumin weight and egg width for DRB was superior than followed by LB. In general, the current result indicates that dual purpose laying type DRB is superior to that of LB in major internal egg traits of compared. This results revealed genotype had significant (P<0.01) effect on traits compared ,and this traits in DRB being dual purpose might be a very good traits to be considered. Data on carcass traits revealed that genotypic variations had a significant (P<0.01) effect on live carcass weight and highly valued carcass cut parts .mean values for live body weight, were significantly different(P<0.05) in KK followed by DRB and the live carcass weight were significantly higher in the male chicks compared to the female ones, and the highly valued carcass cuts (drumstick ,thigh and breast) shows no significant difference (p>0.05) among breeds except drumstick proportion which was higher in DRB , this concludes that growth of chickens was influenced by breed . In general with this dual purpose breeds the ever increasing demand for meat and eggs will be met with further researches and if proper selection and breeding plans are designed .
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MSc Thesis
Keywords
Carcas straits, dual purpose, egg quality, genotype