1. Zuchtwertschätzung für Schafe in Deutschland.
- Author
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RUTEN, W. and SEGELKE, D.
- Subjects
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SHEEP breeds , *INFORMATION resources , *SHEEP breeding , *CLASSIFICATION of books , *AUDIOBOOKS , *PASTORAL systems , *MULTITRAIT multimethod techniques - Abstract
The VDL (Vereinigung Deutscher Landesschafzuchtverbände e. V.) as the umbrella organization of the German State Sheep Breeding Associations is the client for the sheep breeding value assessment. A consolidation of the pedigree and performance data during the development of the common herd book system at vit (serv.it Ovicap) allowed the establishment and introduction of a nationwide breeding value estimation for sheep. Since 2014 routine evaluation is executed once a year for 25 different sheep breeds. Since 2021 routine evaluation is executed twice a year. All known pedigree and performance data from the field test (fertility, fattening and slaughter performance characteristics, exterior classification for herd book recording or licensing as well as maternity or mammalian performance) are taken into account for the breeding value estimation. Various statistical models are used within the individual trait complexes: A BLUP single-trait repeatability model is used for fertility, and BLUP multi-trait models are used for all other feature complexes. The breeding values are expressed as relative breeding values with an average of 100 points and a genetic standard deviation of 20 points. With the introduction and establishment of the nationwide breeding value estimation for sheep, breeders and also the regional breeding associations have access to an innovative tool for breeding selection. Furthermore the objective breeding values are comparable across the regions. By using this source of information consistently, the breeding value estimation can and will contribute to productivity increase in sheep breeding. [ABSTRACT FROM AUTHOR]
- Published
- 2021