Optimization Of Selection For Multiple Traits Using An Economic Model For Layer Chicken Enterprise
Abstract: This paper discussed how to optimize production traits for two layer breeds in Egypt. The first breed is indigenous Fayoumi and the second exotic Leghorn. Both breeds have their different performances and each breed was preferred over the other for some particular traits. By crossing the two breeds, the crossbreds could benefit from the strengths of the purebreds for particular traits. The economic model has been developed for commercial layer enterprise in Egypt to determine the economic value of genetic change for various traits. The economic value was then used in selection index to optimize selection for multiple traits. The economic model was also used to compare the performance of purebreds, crossbreds, and the hybrid line. In general the profits in F1 crossbred and hybrid line were higher than those in Leghorn and Fayoumi at following values of $2065, $1987, $1681 and $1763, respectively.
. Ali, I (1989). Reproductive performances of Fayoumi, Rhode Island Red and Fayoumi x Rhode Island Red crossbred hens and subsequent growth rate of their offspring up to sexual maturity. M. Sc. Thesis. Department of Poultry Science, Bangladesh Agricultural University.
. Barua, A., M.A.R. Howlider and Y. Yoshimura (1998). A study on the performance of Fayoumi, Rhode Island Red and Fayoumi X Rhode Island Red chickens under rural condition in Bangladesh. Asian-Aust. J. Anim. Sci., 11: 635-641.
. Besbes, B (2009). Genotype evaluation and breeding of poultry for performance under sub- optimal village conditions.World's Poultry Science Journal 65: 260-271.
. Bordas, A.; Merat, P. and Minvielle, F (1996). Heterosis in Egg-Laying lines under divergent selection for residual feed consumption. Poult. Sci. 75: 20 24.
. El-Hossari, M. A(1970). Effects of Natural Selection on selection for high body weight at 8 genetic and phenotypic variation in two strains of Fayoumi chickens. U.A.R., J. Anim. Prod.10 (1): 55-63.
. El-Labban A M, Iraqi M M, Hanafi M S and Hassan Heba, A (2011). Estimation of genetic and non-genetic parameters for egg production traits in local strains of chickens. Livestock Research for Rural Development 23 (1) 2011.
. EL-Labban, A. F. M.; Hanafi, M. S. and Khalil, M. H (1991). Genetic studies on egg production in Dokki-4 chicken. Annals of Agric. Sci. Moshtohor, 29 (3): 1081 1094.
. El-Soudany, S. M (2000). Effect of rearing system on performance of chickens. M. Sc. Thesis, Faculty of Agriculture, Ain Shams University, Egypt.
. Fisher, R. A (1918). The Correlation between Relatives on the Supposition of Mendelian Inheritance. Transactions of the Royal Society of Edinburgh 52: 399 433.Food and Agriculture Organization Statistics Division (2002).
. Huseyin Goger et al (2010). Effects of Applied Index Selection Approach on Egg Production Traits in Two Pure Breed Brown Egg Layers. Trends Anim Vet Sci J 2010 1(2):75-78.
. Hossary, M.A. &Galal, E.S.E (1994). Improvement and adaptation of the Fayoumi chicken. Animal Genetic Resources Information, 14: 3341.
. Iraqi, M. M (2008). Estimation of crossbreeding effects for egg production traits in crossbreeding experiment involving two local strains. Egyptian Poultry Science 28(3): 867-882.
. Ketelaars, E.H (2005) and Saxena, H.C (1992). What is this? Management of Poultry Production in the Tropics. Benekon, Holland, 11 pp.
. Khalil M H, Al-Homidan A H and Hermes I H (2002). Genetic evaluation for egg components in crossbreeding experiment of Saudi chickens with White Leghorn. Egyptian Journal of Animal Production 39(1): 67-76.
. Koutoulis K.C., G.C. Perry and P.D. Lewis (1997). Effect of lighting regimen, calcium supply and age at first egg on tibia stiffness and breaking strength, and shell quality in laying hens. Br. Poult. Sci. 39 (suppl): S9 S10.
. Mahmoud, T. H.; Kosba, M. A.; Safaa, M. H. and Afaf, I. E (1981). Breed by Location interaction and crossbreeding as factors influenced Egg production. Agricultural Research Review, (59) 6: 233 - 248, Cairo, Egypt.
. Mian M A (1994). Poultry Production. In; Animal Husbandry. National book Foundation, Islamabad. pp.294.
. Morris, T.R (1967). Light requirements of the fowl. In Environmental control in poultry production (BEMB).
. Morris, T.R (1980). Recent developments in lighting patterns for poultry in light-proof housing.
. Qunaibet M H, Elwafa E A and Mansour M M (1992). Improving the competitive status of Saudi broiler industry. J. King Saud University Agri. Sci. 4(2):164-184.
. Rahman M, Sorensen P, Jensen H A and Dolberg F (1997). Exotic hens under semi scavenging conditions in Bangladesh. Livestock Research for Rural Development Volume 9 (3) http://www.cipav.org.co/lrrd/lrrd9/3/bang931.htm.
. Rajput, N., M. L. Rind and R. Rind (2005). Effect of flock size on Fayoumi layer production. J. Anim. Vet. Adv., 4: 842-844.
. Wei, M., and J.H.J. van der Werf (1993). Animal model estimation of additive and dominance variances in egg production traits of poultry. J. him. Sci. 7157.