Simmental Indexes

Simmental Indexes

New Zealand Simmental selection indexes are calculated for two market specifications, namely, Maternal (Self Replacing) and Terminal. These Indexes relate to typical commercial herds in temperate New Zealand targeting these specifications.
Indexes are reported as an Estimated Breed Value (EBV), in units of relative earning capacity ($’s) for a given market. They reflect both the short-term profit generated by a sire through the sale of his progeny, and the longer-term profit generated by his daughters in a sustainable cow herd, if a proportion of heifers are retained for breeding.
The Indexes are derived using BreedObject technology. More information on this technology is available from the BreedObject web site.

Maternal (Self Replacing) Index ($)

– Estimates the genetic differences between animals in net profitability per cow joined for an example self replacing commercial herd (run in a temperate environment) producing steers. This Index assumes that the joinings are to British breed cows where there is only a modest concern about calving difficulty. The steer progeny are pasture grown and finished and marketed to produce a 300 kg carcase at 16 months. Daughters are retained for breeding. More information is available on the EBV weightings and profit drivers for the Maternal (Self Replacing) Index.

Terminal Index ($)

– Estimates the genetic differences between animals in net profitability per cow joined for an example commercial crossbred herd (run in a
temperate environment) targeting grass-finished production. This Index assumes that the joinings are to British breed cows where there is only a modest concern about calving difficulty. Both heifer and steer progeny are pasture grown and finished and are then slaughtered to produce a 300 kg carcase at 15 months. All progeny are slaughtered. More information is available on the EBV weightings and profit drivers for the Terminal Index.
Note that $Index Values for individual animals are sensitive to the assumptions used in the BreedObject analysis to calculate the relevant selection index
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