Breeding Value Estimation of Trotters in the Netherlands

D. Minkema

Breeding Value Estimation of Trotters in the Netherlands

In: State of Breeding Evaluation in Trotters

Author:

D. Minkema

D. Minkema Research Institute for Animal Production “Schoonoord” P.O. Box 501, 3700 AM Zeist, The Netherlands

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Type:: Chapter

Pages:: 82–94

DOI:: https://doi.org/10.1163/9789004684676_011

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Summary

Since 1974 a breeding value index for trotter stallions is in use in the Netherlands, based on the selection index theory. The index was revised in 1981, when a genetic analysis of more recent data of trotter performances was completed.

The construction of the index and the genetic parameters involved are presented. The index is based on the earnings of the progeny, being in various stages of their trotting carreer. The earnings are corrected for yearly influences, for sex differences and for dam’s performance. Furthermore the number of progeny and the age class to which they belong are taken into account.

Next to an index based on untransformed earnings an index based on the square root of earnings is calculated, which index has a somewhat higher reliability.

It is stressed that a growing need exists for a code of practice for computation and publication of breeding value estimates for trotters. Of particular interest is the problem how the genetic trend in performance data should be taken into account adequately and how the breeding values of trotters from different countries may be compared.

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State of Breeding Evaluation in Trotters

E-Book ISBN:: 9789004684676

Publisher:: Wageningen Academic

Print Publication Date:: 01 Jan 1989

Subjects
- Life Sciences
  - General
  - Animal & Veterinary

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Breeding Value Estimation of Trotters in the Netherlands

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State of Breeding Evaluation in Trotters

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