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Post weaning genetic parameters and indexes for swine

, : Post weaning genetic parameters and indexes for swine. Journal of Animal Science 48(5): 1096-1100

Data were analyzed on 5952 pigs tested at the Ohio Swine Evaluation Station to estimate genetic parameters and compare testing strategies for selection for postweaning net merit. Net merit was defined as feed consumed from 20-90 kg, days of age at 90 kg and percentage lean cuts at 90 kg. Genetic parameters agreed well with those previously published. Theoretical examination of several indexes suggested that most breeders should test their pigs in groups on-the-farm and use an index combining growth and leanness. Approximately 10% improvement in changing net merit should result from measuring feed consumption. This could be worthwhile in testing stations and elite herds. Testing 2 littermate boars in a pen had a 6% advantage in predicting net merit compared to testing sibs to obtain slaughter data is not recommended.

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Related references

Rahnefeld G.W., 1973: Mass selection for post weaning growth in swine part 3 correlated response in weaning weight and feed efficiency to recurrent selection for post weaning average daily gain in swine. Canadian Journal of Animal Science 53(2): 173-178

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