The production results for the DanBred breeding herds and central test station appear from the tables below.
All data from the breeding and multiplier herds combined with all the other data recorded by the owner are sent to the database of DanBred. Every Thursday evening a new index calculation will be automatically carried out in the central computer. Consequently, each Friday morning a new index for all animals in the breeding programme will be available.
The calculations are made by a UNIX computer using the PEST programme developed by E. Groeneveld.
The BLUP method is used for index calculations:
1. All relatives contribute to the estimation of the breeding values for each individual.
A reliable multi-trait animal model is developed on the basis of well-founded assessments of genetic correlations and heritabilities so that known correlations between the various traits of the breeding goal are used. This is very important when a trait is measured on a few animals, such as feed conversion, which is only measured at the test station.
When computing the breeding values the results are obtained using the following model:
Y = S + K + a + l + p +e
S is the effect of section (contemporary group)
In the DanBred breeding programme 90-95 percent of the sows are artifically inseminated. By means of AI and the station test, genetic relationships are created between the breeding stock in different herds. This genetic relationship allows the efficient use of the multi-trait BLUP method.
*LP5: Live piglets at day 5 after farrowing. Included in the breeding goal of the dam lines only.