Phenotypic Correlations amongst Performance Traits in Arbor Arce, Ross 308 and Cobb 500 Strains of Broiler Chicken Raised in Akwa Ibom State
Abstract
This study was conducted to establish the relationships among growth performance traits in three strains (Arbor Arce, Ross 308 and Cobb 500) of broiler chicken. A total of 144-day old chicks were assigned to three experimental treatments according to strain each treatment was further replicated four times with 12 birds per replicate in a completely randomized design. The experiment lasted for eight weeks. The growth performance parameters measured were initial body weight (IBW), final body weight (FBW), daily weight gain (DWG), total weight gain (TWG), daily feed intake (DFI), total feed intake (TFI) and feed conversion ratio (FCR). Data collected both at starter (1-4weeks) and finisher (5-8 weeks) phases were subjected to analyses of variance and correlation analysis to establish the relationship among the performance traits. The results indicated that there were significant (p<0.05) differences in all the parameters measured in the starter phase except initial body weight with cobb 500 being superior to Abor Acre and Ross. In the finisher phase, there were also significant (p<0.05) differences in all the parameters measured except DFI and TFI. The correlation coefficients among the performance traits in the starter phase were positive except the relation between growth performance traits and FCR which were significantly (p<0.05) negative. FBW had a perfect relation with TWG and DFI in the three strains studied. In the finisher phase, high, positive and highly significant (p<0.001) correlation coefficients were observed between IBW and FBW (r=0.780), IBW with TWG and DWG (r=0.611 and 0.652 respectively) and a perfect correlation (r=1.00) was observed between DWG and TWG in Arbor Arce strain. Similar relationships were also obtained in Ross and Cobb. The relationship between FCR and all other growth parameters were significantly (p<0.05) negative. It was concluded that that the significant positive correlation among the performance traits in the three strains of broiler chicken is a good indication of dependency among these traits. Therefore, improvement in one will lead to a corresponding improvement in the other traits.
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References
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