Home Selection The selection indices

The selection indices

The selection index is an output from the sum of the different traits indices. The weight of each trait depends on its genetic correlation with the other traits and on its economic importance. The index sets the rank of the sires proven to AI and the rank of the cows “mothers of sire”.

Anaborapi has set two selection indices: the Breeding Index with the aim to point out the sires to generate good cows and the Meat Index with the aim to point out the sires to generate animals for factory.

Trait Sire Cows
Meat Index Breeding Index Meat Index Breeding Index
Growing 14% 14% 10% 10%
Muscularity 20% 20% 14% 14%
Birth ease 40% 20% 40% 20%
Calving ease 20% 40% 20% 40%
Limbs 6% 6% 4% 4%
Morphological Indices

Size

Muscularity

Limbs

4%

6%

2%

4%

6%

2%

The differences between the two indices are exclusively in the weights referred to calving ease and birth ease. The traits linked to the calving weight 60%, the productive traits 34 % and the limbs 6%. In the Breeding Index the calving ease has an higher weight because the aim is the production of good cows. In the Meat Index the birth ease has an higher importance because the sires have to produce animals for slaughter. The Meat and Breeding Index of the cows are calculated including the indices of size, muscularity and limbs coming from their visual appraise and from the performance test results (for the same traits) of their ancestors.