Broiler Genetics May Influence Performance Response When Fed Low Crude Protein Diets
DOI:
https://doi.org/10.3923/ijps.2022.136.141Keywords:
Amino acid, broiler, crude protein, growth performance, meat productionAbstract
Background and Objective: Genetic selection for rapid growth and increased meat yield in a short period of time has greatly improved feed efficiency. However, the increased pressure for growth has prompted unforeseen consequences of other stressors on the broiler bird. These stressors utilize energy and nutrients that otherwise would be utilized for growth. This study was designed to evaluate how two genetic lines would perform while consuming less protein as a potential model to evaluate feed additives that may improve digestibility or immune and oxidative status. Materials and Methods: A field study was conducted and a reduced protein model was used in these two experiments. In experiment 1, Cobb 500 male broiler chicks were randomly allocated to one of two dietary treatments: Nutrient adequate basal diet and the basal diet with reduced crude protein. In experiment 2, Cobb 700 male broiler chicks were randomly assigned to the experimental diets used in experiment 1. Results: Body weight was decreased in Cobb 500 broilers compared with Cobb 700 broilers when dietary crude protein was reduced. Furthermore, Cobb 500 broilers consumed less feed compared with Cobb 700 broilers when dietary crude protein was reduced. Conclusion: As a producer, it is essential to find the point of maximum economic efficiency for the strain of broilers being reared. These data indicated differences among broiler genetic lines and dietary crude protein need to be considered when formulating diets.
References
Tixier-Boichard, M., F. Leenstra, D.K. Flock, P.M. Hocking and S. Weigend, 2012. A century of poultry genetics. World's Poult. Sci. J., 68: 307-321. 2. Siegel, P.B., 2014. Evolution of the modern broiler and feed efficiency. Annu. Rev. Anim. Biosci., 2: 375-385. 3. Zuidhof, M.J., B.L. Schneider, V.L. Carney, D.R. Korver and F.E. Robinson, 2014. Growth, efficiency and yield of commercial broilers from 1957, 1978 and 2005. Poult. Sci., 93: 2970-2982. 4. Smith, E.R. and G.M. Pesti, 1998. Influence of broiler strain cross and dietary protein on the performance of broilers. Poult. Sci., 77: 276-281. 5. Smith, E.R., G.M. Pesti, R.I. Bakalli, G.O. Ware and J.F. Menten, 1998. Further studies on the influence of genotype and dietary protein on the performance of broilers. Poult. Sci., 77: 1678-1687. 6. Sterling, K.G., G.M. Pesti and R.I. Bakalli, 2006. Performance of different broiler genotypes fed diets with varying levels of dietary crude protein and lysine. Poult. Sci., 85: 1045-1054. 7. Holsheimer, J.P. and C.H. Veerkamp, 1992. Effect of dietary energy, protein and lysine content on performance and yields of two strains of male broiler chicks. Poult. Sci., 71: 872-879. 8. MACLEOD, M.G., 2002. Comparison of body weight responses to dietary lysine concentration in broilers of two commerciallines and a 'relaxed-selection'line. Br. Poult. Sci., 39: 34-35. 9. Fraps, G.S., 1943. Relation of the protein, fat and energy of the ration to the composition of chickens. Poult. Sci., 22: 421-424. 10. Parsons, C.M. and D.H. Baker, 1982. Effect of dietary protein level and monensin on performance of chicks. Poult. Sci., 61: 2083-2088. 11. Summers, J.D., D. Spratt and J.L. Atkinson, 1992. Broiler weight gain and carcass composition when fed diets varying in amino acid balance, dietary energy and protein level. Poult. Sci., 71: 263-273. 12. Hartcher, K.M. and H.K. Lum, 2020. Genetic selection of broilers and welfare consequences: A review. World's Poult. Sci. J., 76: 154-167. 13. Klasing, K.C., 1998. Nutritional modulation of resistance to infectious diseases. Poult. Sci., 77: 1119-1125. 14. FASS., 2010. Guide for the Care and Use of Agricultural Animals in Research and Teaching. 3rd Edn., Federation of Animal Science Societies, Champaign, IL., USA. 15. Si, J., D.J. Burnham and P.W. Waldroup, 2004. Extent to which crude protein may be reduced in corn-soybean meal broiler diets through amino acid supplementation. Int. J. Poult. Sci., 3: 46-50. 16. Wang, J., S. Su, C. Pender, R. Murugesan, B. Syed and W.K. Kim, 2021. Effect of a phytogenic feed additive on growth performance, nutrient digestion and immune response in broiler-fed diets with two different levels of crude protein. Animals, Vol. 11, 10.3390/ani11030775 17. Filho, D.F., P. Rosa, B. Vieira, M. Macari and R. Furlan, 2005. Protein levels and environmental temperature effects on carcass characteristics, performance and nitrogen excretion of broiler chickens from 7 to 21 days of age. Rev. Bras. Cienc. Avícola, 7: 247-253. 18. Uzu, G., 1988. Limit of reduction of the protein level in broiler feeds. Philipp. J. Vet. Anim. Sci. (Philipp.), 9: 242-243.
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