The present paper is concentrated on two main topics. Firstly it discusses genetic development in growth, body composition, appetite and feed conversion ratio in pigs and poultry. Selection experiments involving these traits are reviewed and further development in selection on lean growth and efficiency is discussed including the role of appetite in selection schemes. The second topic is related to the increased importance of measuring body composition of live animals in order to increase the efficiency of lean growth. Some methods are discussed, but most emphasize is put on presenting results from use of Computerized Tomography (CT) in pig and poultry breeding.

O. Vangen, N. Kolstad

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XI. Genetics of reproduction, lactation, growth, adaptation, disease, and parasite resistance., , 367–380, 1986
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