Genetic improvement of reproductive performance is one of the most important breeding goals in pigs. Reproductive performance is the major component of sow productivity as well as a key factor affecting the efficiency and economy of pig industry in both breeding and commercial herds. Index selection is a method where the net values of all traits of the selection criteria are combined into a single index value (Hazel et al., 1994). The index is derived from combining the estimated breeding values and the corresponding economic values of each trait. Reproductive performance is expected to have a potential for remarkable improvement, due to the introduction of modern statistical methods (e.g. the BLUP animal model) for genetic evaluation (Glodek, 1999). An index is calculated for each animal based on its performance for each trait. Selection is then based on the ranking of individuals according to index value thus the index value is an estimate of the cumulative value of each animal’s genetic potential of all traits included. The aim of this paper is to construct selection indices including four traits of economic importance. The traits were chosen because of their realized significance in sow production as well as their sufficient information.   

P. Sangsuriya, C. Reodecha, V. Chavananikul

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 19, , 19.16, 2002
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