DAIRY SIRES » Acronym Descriptions

The variety of data included on a sire price list can cause confusion and a feeling of uncertainty. The links below provide some incite and explanation of the basic proof indexes and traits.
 
Total Performance Index (TPI)
Total Performance Index (TPI) is a multi-trait index calculated combining production, Type, longevity, and fertility into a single value. The higher, the better. The following notes the percentage of importance given to each feature.

46% PRODUCTION
  • 21 Protein
  • 17 Fat
  • 8 Feed efficiency
28% HEALTH
  • 13 Fertility index
  • 4 Productive life
  • 3 Cow livability
  • -5 Somatic cell score
  • -2 Daughter calving ease
  • -1 Daughter stillbirth
26% CONFORMATION
  • 11 Udder
  • 8 PTA type
  • 6 Feed and leg
  • -1 Dairy form