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Impact of genetic selection for growth and immunity on resource allocations¹,^,2

Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg 24061-0306

³ Corresponding author: pbsiegel{at}vt.edu

The allocation of resources for maintenance, growth, reproduction, and health is a dynamic throughout the life of an animal. Resources are finite, and where allocations are directed is a function of an individual’s genetic background, stage in the life cycle, and environmental challenges. Included in this paper are discussions of the concept of resource allocation with examples from experiments.

Key Words: chicken • genetic selection • sheep red blood cell • body weight • antibody

¹ Some portions of this manuscript are redundant with Siegel, P. B. 2003. Genetics of adaptability and robustness. In Proc. 3rd Eur. Poult. Genet. Symp., Univ. Wageningen, Wageningen, the Netherlands.

² Papers from the Informal Nutrition Symposium, "Modulating Immunity: The Role of Nutrition, Disease, Genetics, and Epigenetics," were presented at the Poultry Science Association 97th Annual Meeting in Niagara Falls, Ontario, Canada, on July 20, 2008.