Sire Evaluation in the German Trotter (Standardbred) Population

O. Katona; O. Distl

Sire Evaluation in the German Trotter (Standardbred) Population

In: State of Breeding Evaluation in Trotters

Authors:

O. Katona

O. Katona Hauptverband für Traber-Zucht und -Rennen e. V., FR Germany

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O. Distl

O. Distl Lehrstuhl für Tierzucht der Universität München, FR Germany

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Type:: Chapter

Pages:: 55–61

DOI:: https://doi.org/10.1163/9789004684676_007

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Summary

Since 1973, we are working on the breeding programme for the German trotter population. Following data are filed continually: all horses born since 1966: name, age, date of birth, pedigree, (2 generations); at present, this file contains 40.005 horses. All racing performances since 1973 (name of horse, date of race, race course, rank at finish incl. disqualifications, earnings, racing time, racing distance, condition of race track, starting method, purse of the race); at present, this file contains 1.154.221 racing performances.

For sire evaluation, following traits are taken into account:

- average racing time per year of the two to seven year old horses; heritability estimates for own performance range from .23 to .44, depending on the age - concerning progeny performance the estimate amounts to .35.

- average racing time per year of the two and three year old progeny; heritability estimate is .50.

- money earnings per year of the two to seven year old horses; heritability estimates range from .14 to .27, depending on the age -concerning progeny performance the estimate amounts to .21.

- percentage of progeny raced at the age of two years; heritability estimate is .15.

- percentage of progeny raced at the age of two and three years; heritability estimate is .21.

- percentage of progeny not raced up to the age of five years (=culling rate); heritability estimate is .27.

After adjusting to the important environmental factors, breeding values are estimated by BLUP-method separately for own performance and progeny performance. Concerning progeny performance, the non-random mating structure is adjusted by means of the racing performance of the paternal half-sibs of the mated mares.

Furthermore, following selection indices are constructed:

- average racing time/money earnings per year.

- average racing time per year to the two and three year old progeny/percentage of progeny raced at the age of two and three years. This parameter displays the capacity to produce precocious progeny.

These indices are published annually in the official breeder’s magazine both for own performance and progeny performance. As a supplementary information, the percentages of the progeny raced at the age of two years and the culling rates of the sires are also published.

In the very next future, scoring of the young sires will be done by the index for average racing time/money earnings (own performance), and culling of the sires beneath the average by the same index, but of course for progeny performance.

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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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Sire Evaluation in the German Trotter (Standardbred) Population

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State of Breeding Evaluation in Trotters

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