This paper outlines the construction of industry selection indexes for the SIL sheep genetic evaluation process. Traits of direct economic importance in New Zealand sheep production form goal trait groups with each goal trait assigned an economic weight for use in selection indexes. Goal trait group indexes are calculated as the sum of breeding values for each goal trait within the relevant group after multiplication by the relevant economic weight. Three overall indexes can also be calculated by combining goal trait group indexes. The three overall indexes include a Dual Purpose (DP) index, a Terminal Sire (TS) index and a Fine Wool (FW) index. Flexibility is offered to users through the ability to choose overall and goal trait group indexes presented in their results, and the ability to add new indexes to the system.
Proceedings of the New Zealand Society of Animal Production, Volume 60, Hamilton, 189-191, 2000
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